Pulley hangs on iOS 14 Beta 4 #390

florianbuerger · 2020-08-05T12:03:29Z

After upgrading to iOS 14 Beta 4, even the example projects won't launch anymore and the CPU is at 100%. I didn't have time to investigate further so I don't know if this is a bug from iOS 14 or Pulley. It worked fine until iOS 14 Beta 3.

Anyway, a short term fix I found is to slightly delay the layout code for Pulley with a good old DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) — which, in my initial testing — seems to resolve the issue. See for an example florianbuerger@ea6c287

Just wanted to leave that here in case anyone else is running into it.

The text was updated successfully, but these errors were encountered:

rafaelfrancisco-dev · 2020-08-06T13:58:08Z

This bug started showing up in 14b4, it's an auto layout loop caused by calling view.setNeedsLayout() inside of override open func viewDidLayoutSubviews() when setting the value on the variable currentDisplayMode. For now I've removed the view.setNeedsLayout() from the variable setter, but it might cause unexpected behavior when changing the drawer display mode after it is drawn.

My guess is that this bug is being caused by a faster UI drawing brought by the latest beta, which causes a new re-draw while the call to viewDidLayoutSubviews() hasn't finished yet, you can run your projects with the launch argument -UIViewLayoutFeedbackLoopDebuggingThreshold 100 to better debug this issue.

andreyz · 2020-08-11T12:42:21Z

Here's a good summary on how to debug auto-layout feedback loops.

pmacro · 2020-08-18T19:57:07Z

FYI still occurs on Beta 5.

pmacro · 2020-08-18T20:17:52Z

Around line 597:

changing this:

    public fileprivate(set) var currentDisplayMode: PulleyDisplayMode = .automatic {
        didSet {
            if self.isViewLoaded
            {
                self.view.setNeedsLayout()
            }

            if oldValue != currentDisplayMode
            {

to this:

    public fileprivate(set) var currentDisplayMode: PulleyDisplayMode = .automatic {
        didSet {
            if oldValue != currentDisplayMode
            {
                if self.isViewLoaded
                {
                    self.view.setNeedsLayout()
                }

Fixes it. I don't know this feature or codebase well enough to judge the implications of not running setNeedsLayout when old and new values are the same.

funkenstrahlen · 2020-08-19T07:43:17Z

I can confirm this issue. Still present on beta 5.

@pmacro Thank you for providing a proposal for a fix! Are you able to open a PR with the fix?

pmacro · 2020-08-19T22:58:12Z

@funkenstrahlen we only use drawer mode, so my workaround may not work in all cases. I think someone who knows the codebase, and all edge cases, or who has time to discover them, would be better placed to fix this. I posted the workaround mainly to help anyone else who's trying to test the rest of their app for iOS 14 launch.

…pports pannel mode. via issue #390

ulmentflam · 2020-08-20T14:35:46Z

Hey! Thanks everyone for looking into this issue as I have not had a chance to dive into Xcode 12 yet. I have created the xcode12 branch to start looking into the beta issues with iOS 14 and have included the above patch for this issue, as well as the fix for if the drawer in panel mode and the display mode does not transition. Please continue to test on this branch and let me know what you run into in the betas leading up to the iOS 14 release.

funkenstrahlen · 2020-09-01T11:38:17Z

Thank you for providing the xcode12 branch with the fix. It does actually improve the situation as the app does not hang on startup anymore.

However when I try to manually change the pulley position state it still starts to hang in an infinite loop.

stevi-clue · 2020-09-07T07:34:03Z

Hi! When can we expect an updated version of the SDK with the fix?

ulmentflam · 2020-09-07T20:10:56Z

@florianbuerger is this infinite loop happening when you call setDrawerPosition(position, animated, completion?)?

florianbuerger · 2020-09-08T10:16:33Z

@ulmentflam I am not 100% sure what you mean. Do you mean in the patched version I linked in my first message?

We have been using Pulley with that fix for a while now and we didn't encounter any more problems. There are no hangs anymore. We are calling setDrawerPosition(position, animated, completion?) often and also directly after launching the app to restore a saved drawer position. We are also using the panel mode on iPad, no issues there as well.

I haven't had time to check out the xcode12 branch.

ulmentflam · 2020-09-08T14:09:00Z

I'm sorry @florianbuerger, I did mean to tag @funkenstrahlen in my question above who is testing on the xcode12 branch. However, it is good to know that you are not experiencing any other hanging issues with a slight delay in the layout code as I continue to investigate.

florianbuerger · 2020-09-08T15:48:19Z

@ulmentflam Ah, got it 😄 I'll see if I can test the xcode12 branch this week. Not sure if we need anything else from my fork of Pulley, it has been a while since I looked at that part of the app.

sohail-niazi · 2020-09-14T11:42:59Z

Hi, I have tried this branch in xcode 12 but app hangs on launch. but it is working fine with xcode 11.

Hey! Thanks everyone for looking into this issue as I have not had a chance to dive into Xcode 12 yet. I have created the xcode12 branch to start looking into the beta issues with iOS 14 and have included the above patch for this issue, as well as the fix for if the drawer in panel mode and the display mode does not transition. Please continue to test on this branch and let me know what you run into in the betas leading up to the iOS 14 release.

ulmentflam · 2020-09-14T16:43:31Z

@sohail-niazi are you using Xcode 12 Beta 6?

sohail-niazi · 2020-09-14T18:03:00Z

@sohail-niazi are you using Xcode 12 Beta 6?

yes it is Xcode 12 beta 6.

pmacro · 2020-09-15T18:52:36Z

Hi @ulmentflam, I fully understand all the moving parts here, and that this may be an unreasonable question! But given the announcement that iOS 14 will be released tomorrow, could you please share your thoughts on the timing of this fix? Do you plan to have a compatible release ASAP, or do you plan to hold off until there is more clarity on reported issues, such as @sohail-niazi's? That information would help me, and hopefully others, who plan to release iOS 14 updates for their apps ASAP. Thank you!

ulmentflam · 2020-09-15T19:39:30Z

@pmacro I am planning to hold off until there is more clarity on the reported issues before getting this branch out specifically. I would like to get more clarity on @sohail-niazi's and @funkenstrahlen's issues before I release (as on the sample project I have not been able to replicate either of their issues on this branch). I want to get a fix for this issue out as soon as possible, as soon as I have clarity on these existing issues. That leads me to my next question for @sohail-niazi, Can you replicate this issue in the demo project for me?

funkenstrahlen · 2020-09-16T08:33:42Z

Unfortunately I will not be able to provide further input to this issue. I decided to go with a completely different approach and use system default modal views instead of Pulley in my app as I am trying to get the app compatible with macOS. This will be more easy with default system components in my case.

pschneider · 2020-09-16T14:25:33Z

@ulmentflam
We can reproduce this issue in two of our apps with latest stable version. After applying the xcode12 branch of this repo our views work as expected and we could so far not detect any other side effects.

sohail-niazi · 2020-09-16T18:36:12Z

@ulmentflam I have tried demo project for xcode12 branch. It works fine but still I cant make it work(my project) on ios14, ios13 is running fine. I have vereified xcode12 branch changes after pod install. But App just gets stuck on launch and no logs even.

UPDATE:
Demo project too is hanging on Start ... Steps to reproduce error:
1 - UnComment programatical loading of pulleyViewController and add primary/drawer views
2 - set initial position .closed and app hangs.

ulmentflam · 2020-09-16T18:47:31Z

@sohail-niazi have you made any customizations or tweeks to Pulley, or have you subclassed it?

sohail-niazi · 2020-09-16T18:50:01Z

@sohail-niazi have you made any customizations or tweeks to Pulley, or have you subclassed it?

No.. I am using base PulleyViewController in my application.

I was able to reproduce error on demo project. Steps to reproduce error:
1 - UnComment programatical loading of pulleyViewController and add primary/drawer views
2 - set initial position .closed and app hangs.

ulmentflam · 2020-09-16T19:21:18Z

@sohail-niazi That's great! It looks like there is still an auto-layout feedback loop when the initial drawer position is set. I am looking into it now, thanks for the feedback!

sohail-niazi · 2020-09-16T19:21:26Z

@ulmentflam Apparently PulleyViewController is running in infinite loop. It's viewDidLayoutSubviews() method is getting called in loop...
And getting this message in UIMainApplication after applying breakpoint in PulleyViewController :
"Application violated contract by causing UIApplicationMain() to return. This incident will be reported."

sohail-niazi · 2020-09-16T19:22:11Z

@sohail-niazi That's great! It looks like there is still an auto-layout feedback loop when the initial drawer position is set. I am looking into it now, thanks for the feedback!

Much appreciated speedy response. Thanks...

ulmentflam · 2020-09-17T01:24:15Z

@funkenstrahlen I know you are no longer using Pulley for your application, but were you by chance changing the position of the drawer to or from the .closed position?

funkenstrahlen · 2020-09-17T03:27:39Z

@funkenstrahlen I know you are no longer using Pulley for your application, but were you by chance changing the position of the drawer to or from the .closed position?

Yes that's exactly what I did and that also caused the same 'hang' symptom.

sohail-niazi · 2020-09-18T18:57:58Z

Issue is resolved in App. It is working fine now. The culprit was this code snippet:

 func drawerChangedDistanceFromBottom(drawer: PulleyViewController, distance: CGFloat, bottomSafeArea: CGFloat)
    {
        
        
        if distance > 0.0 {
            drawer.drawerBackgroundVisualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))
        } else {
            drawer.drawerBackgroundVisualEffectView = UIVisualEffectView(effect: .none)
        }
        
    }

removing It worked as expected.

@ulmentflam Thank you very much for great support and response.

ulmentflam · 2020-09-18T19:01:14Z

@sohail-niazi No problem! Are you still on the xcode12 branch?

sohail-niazi · 2020-09-18T19:05:03Z

@ulmentflam Yes I am.

ulmentflam · 2020-09-18T19:08:28Z

@emresa37 Are you still experiencing your issue on the xcode12 branch?

emresa37 · 2020-09-19T08:04:39Z

@ulmentflam No it's fixed. Thank you for great support 👍

ovdm · 2020-09-19T22:09:12Z

@ulmentflam also experienced the issue. 100% CPU, loop on layoutSubview..
Just upgraded to master and seems to be working.
Thanks for the support. Would have been virtually impossible for me to fix

pmacro · 2020-09-21T20:20:17Z

@ulmentflam I just wanted to confirm: is the xcode12 branch that everyone seems to be reporting as working, equal to the 2.8.3 release? Or is there something different in there that you're planning for a subsequent release?

And as an aside, thanks for all your work on this release, especially given the short time scale Apple gave us all to have solid iOS 14 versions of our libraries. 👏

150vb · 2020-09-22T04:30:32Z

Hello, Pulley still hangs on iOS 14 when I set the view alpha, and I am using release 2.8.3.

func drawerPositionDidChange(drawer: PulleyViewController, bottomSafeArea: CGFloat)
    {
        if drawer.drawerPosition != .collapsed
        {
            view.backgroundColor = .white
            drawer.drawerBackgroundVisualEffectView?.alpha = 0.1
            drawer.drawerContentContainerView?.alpha = 1.0
            drawer.shadowOpacity = 0.1
        } else {
            view.backgroundColor = .clear
             drawer.drawerBackgroundVisualEffectView?.alpha = 0.0
             drawer.drawerContentContainerView?.alpha = 0.0
             drawer.shadowOpacity = 0.0
        }
    }

ulmentflam · 2020-09-22T20:33:56Z

@pmacro The xcode12 branch that everyone is reporting as working is equal to the 2.8.3 release as of now. As new issues come in related to Xcode 12 it will be the bugfix branch for continued development

ulmentflam · 2020-09-22T20:42:49Z

@150vb I will look into that as soon I get a chance. In the meantime can you please look in to running your app with -UIViewLayoutFeedbackLoopDebuggingThreshold 100 as referenced here and posting any useful information you can on the auto-layout feedback loop that your app is running into?

150vb · 2020-09-23T05:32:23Z

@ulmentflam Thanks for the replies, I posted the logs here, I thought these would be useful. I was able to reappearance it via PullyDemo.

2020-09-23 13:12:07.161330+0800 PulleyDemo[18818:574117] [LayoutLoop] Degenerate layout! Layout feedback loop detected in subtree of <UIView: 0x7f95d20056e0; frame = (0 0; 375 812); wants auto layout; hosts layout engine; tAMIC = YES; >. 

Top-level view = <UIView: 0x7f95d20056e0; frame = (0 0; 375 812); wants auto layout; hosts layout engine; tAMIC = YES; >

Views caught in loop: 
3 <UIView: 0x7f95d20056e0; frame = (0 0; 375 812); wants auto layout; hosts layout engine; tAMIC = YES; >
|   <UIView: 0x7f95d06075a0; frame = (0 0; 375 812); wants auto layout; tAMIC = NO; >
|   |   <UIView: 0x7f95d220c2d0; frame = (0 0; 375 812); wants auto layout; tAMIC = NO; >
|   |   |   <MKMapView: 0x7f95d4817600; frame = (0 0; 375 812); wants auto layout; tAMIC = NO; >
|   |   |   |   <_MKMapContentView: 0x7f95d0606ab0; frame = (0 0; 375 812); >
|   |   |   |   |   <MKBasicMapView: 0x7f95d06178b0; frame = (0 0; 375 812); >
|   |   |   |   |   |   <_MKMapLayerHostingView: 0x7f95d0617c40; frame = (0 0; 375 812); >
|   |   |   |   |   <MKScrollContainerView: 0x7f95d061b640; frame = (-5277.33 -1968.67; 6192.75 6192.75); >
|   |   |   |   |   <MKAnnotationContainerView: 0x7f95d0617db0; frame = (0 0; 375 812); >
|   |   |   |   <MKAppleLogoImageView: 0x7f95d2125ad0; baseClass = UIImageView; frame = (10 752; 90 19); >
|   |   |   |   <MKAttributionLabel: 0x7f95d070b8c0; frame = (336.426 757.26; 28.5742 10.7402); >
|   |   |   <UIVisualEffectView: 0x7f95d220dc30; frame = (0 0; 375 44); wants auto layout; tAMIC = NO; >
|   |   |   |   <_UIVisualEffectBackdropView: 0x7f95d220e1a0; frame = (0 0; 375 44); >
|   |   |   |   <_UIVisualEffectSubview: 0x7f95d220f0b0; frame = (0 0; 375 44); >
|   |   |   |   <_UIVisualEffectContentView: 0x7f95d220de00; frame = (0 0; 375 44); >
|   |   |   <UIView: 0x7f95d060df90; frame = (323 52; 44 74); wants auto layout; tAMIC = NO; >
|   |   |   |   <UIButton: 0x7f95d0610550; frame = (11 10; 22 22); wants auto layout; tAMIC = NO; >
|   |   |   |   |   <UIImageView: 0x7f95d0610a30; frame = (-39 -39; 100 100); >
|   |   |   |   |   <UIImageView: 0x7f95d210c7b0; frame = (0 0; 22 22); >
|   |   |   |   <UIButton: 0x7f95d270a900; frame = (11 42; 22 22); wants auto layout; tAMIC = NO; >
|   |   |   |   |   <UIImageView: 0x7f95d212f490; frame = (0 0; 22 22); >
|   |   |   <UILabel: 0x7f95d220cc40; frame = (325 677; 42 25); text = '78°'; wants auto layout; tAMIC = NO; >
|   <UIView: 0x7f95d0608cd0; frame = (0 -76; 375 2187); >
|   1 <Pulley.PulleyPassthroughScrollView: 0x7f95d0813200; baseClass = UIScrollView; frame = (0 64; 375 748); wants auto layout; tAMIC = YES; >
|   |   <UIView: 0x7f95d0607c80; frame = (0 646; 375 768); >
|   |   <UIVisualEffectView: 0x7f95d0608e40; frame = (0 646; 375 768); >
|   |   |   <_UIVisualEffectBackdropView: 0x7f95d0609210; frame = (0 0; 375 768); >
|   |   <UIView: 0x7f95d0607b10; frame = (0 646; 375 768); wants auto layout; tAMIC = YES; >
|   |   |   2 <UIView: 0x7f95d07144c0; frame = (0 0; 375 768); wants auto layout; tAMIC = NO; >
|   |   |   |   <UIView: 0x7f95d0714d40; frame = (0 0; 375 778); wants auto layout; tAMIC = NO; >
|   |   |   |   |   <UIView: 0x7f95d0713870; frame = (0 0; 375 102); wants auto layout; tAMIC = NO; >
|   |   |   |   |   |   <UISearchBar: 0x7f95d22132f0; frame = (0 6; 375 56); text = ''; wants auto layout; tAMIC = NO; >
|   |   |   |   |   |   |   <UIView: 0x7f95d2213fb0; frame = (0 0; 375 56); >
|   |   |   |   |   |   |   |   <_UISearchBarScopeContainerView: 0x7f95d0713700; frame = (0 56; 375 0); >
|   |   |   |   |   |   |   |   |   <_UISearchBarScopeBarBackground: 0x7f95d0713c70; frame = (0 0; 375 0); >
|   |   |   |   |   |   |   |   |   <UISegmentedControl: 0x7f95d07132d0; frame = (188 7; 0 32); >
|   |   |   |   |   |   |   |   <UISearchBarBackground: 0x7f95d2214120; frame = (0 0; 375 56); >
|   |   |   |   |   |   |   |   |   <_UIBackdropView: 0x7f95d07148c0; frame = (0 0; 375 56); >
|   |   |   |   |   |   |   |   |   |   <_UIBackdropEffectView: 0x7f95d07152b0; frame = (0 0; 375 56); >
|   |   |   |   |   |   |   |   |   |   <UIView: 0x7f95d061b3b0; frame = (0 0; 375 56); >
|   |   |   |   |   |   |   |   <_UISearchBarSearchContainerView: 0x7f95d2214740; frame = (0 0; 375 56); >
|   |   |   |   |   |   |   |   |   <UISearchBarTextField: 0x7f95d303a600; frame = (8 10; 359 36); text = ''; >
|   |   |   |   |   |   |   |   |   |   <_UISearchBarSearchFieldBackgroundView: 0x7f95d070d5d0; frame = (0 0; 359 36); >
|   |   |   |   |   |   |   |   |   |   |   <_UISearchBarSearchFieldBackgroundView: 0x7f95d070d980; frame = (0 0; 359 36); >
|   |   |   |   |   |   |   |   |   |   <UIImageView: 0x7f95d210ceb0; frame = (6 8.66667; 19.6667 18); >
|   |   |   |   |   |   |   |   |   |   <UISearchBarTextFieldLabel: 0x7f95d0714040; frame = (29.6667 8; 199.667 20.3333); text = 'Where do you want to go?'; >
|   |   |   |   |   |   |   |   |   |   <_UISearchTextFieldCanvasView: 0x7f95d2215700; frame = (29.6667 2; 322.333 32); >
|   |   |   |   |   |   |   |   |   |   |   <UITextSelectionView: 0x7f95d500b3a0; frame = (0 0; 0 0); >
|   |   |   |   |   |   <UIView: 0x7f95d0713e40; frame = (0 101.667; 375 0.333333); wants auto layout; tAMIC = NO; >
|   |   |   |   |   <UITableView: 0x7f95d1825800; frame = (0 102; 375 646); wants auto layout; tAMIC = NO; >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d2145aa0; frame = (0 567; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d2145e70; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d2146000; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d21462a0; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2146540; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d21475c0; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d2143df0; frame = (0 486; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d21441c0; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d2144350; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d21445f0; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2144890; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2145910; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d2142250; frame = (0 405; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d2142620; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d21427b0; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d2142a50; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2142cf0; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2143c60; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d21407a0; frame = (0 324; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d2140b70; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d2140d00; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d2140fa0; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2141240; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d21420c0; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d213ec10; frame = (0 243; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d213efe0; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d213f170; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d213f410; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d213f6b0; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2140610; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d213cda0; frame = (0 162; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d213d170; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d213d300; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d213d5a0; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d213d840; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d213e720; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d213b1c0; frame = (0 81; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d213b590; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d213b720; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d213b9c0; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d213bc60; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d213cc10; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <UITableViewCell: 0x7f95d2135990; frame = (0 0; 375 81); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   <UITableViewCellContentView: 0x7f95d2135f60; frame = (0 0; 375 81); >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d21362f0; frame = (16 15.3333; 200.333 24); text = 'Neighborhood Market'; >
|   |   |   |   |   |   |   |   <UITableViewLabel: 0x7f95d2136ce0; frame = (16 43; 58.3333 20.3333); text = 'Subtitle'; >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d2136f80; frame = (15 80; 360 1); >
|   |   |   |   |   |   |   <_UITableViewCellSeparatorView: 0x7f95d213af10; frame = (16 80.6667; 359 0.333333); >
|   |   |   |   |   |   <_UIScrollViewScrollIndicator: 0x7f95d061f430; frame = (369 235.5; 3 7); >
|   |   |   |   |   |   |   <UIView: 0x7f95d061f5c0; frame = (0 0; 3 7); >
|   |   |   |   |   |   <_UIScrollViewScrollIndicator: 0x7f95d061f130; frame = (365 640; 7 3); >
|   |   |   |   |   |   |   <UIView: 0x7f95d061f2c0; frame = (0 0; 7 3); >
|   |   |   |   <UIView: 0x7f95d0713500; frame = (169.667 6; 36 5); wants auto layout; tAMIC = NO; >
|   |   |   |   <UIView: 0x7f95d20124a0; frame = (0 748; 375 0.666667); wants auto layout; tAMIC = NO; >

Views receiving layout in order: (
	<Pulley.PulleyPassthroughScrollView: 0x7f95d0813200; baseClass = UIScrollView; frame = (0 64; 375 748); wants auto layout; tAMIC = YES; >
	<UIView: 0x7f95d07144c0; frame = (0 0; 375 768); wants auto layout; tAMIC = NO; >
	<UIView: 0x7f95d20056e0; frame = (0 0; 375 812); wants auto layout; hosts layout engine; tAMIC = YES; >
)


*** Views With Geometry Changes ***
Geometry change records for <UIView: 0x7f95d0607b10; f={{0, 646}, {375, 768}} >:
(
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >"
)
Geometry change records for <UIView: 0x7f95d0608cd0; f={{0, -76}, {375, 2187}} >:
(
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 0; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, -76; 375, 2187); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >"
)
Geometry change records for <Pulley.PulleyPassthroughScrollView: 0x7f95d0813200; f={{0, 64}, {375, 748}} baseClass = UIScrollView; >:
(
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 64; 375, 748); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >"
)
Geometry change records for <UIView: 0x7f95d0607c80; f={{0, 646}, {375, 768}} >:
(
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >"
)
Geometry change records for <UIVisualEffectView: 0x7f95d0608e40; f={{0, 646}, {375, 768}} >:
(
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >",
    "<frame = (0, 646; 375, 768); in -viewDidLayoutSubviews of <Pulley.PulleyViewController: 0x7f95d0812800> with <UIView: 0x7f95d20056e0; f={{0, 0}, {375, 812}} >; >"
)

*** Call stacks where -setNeedsLayout is sent to the top-level view ***
{(
    (
	0   UIKitCore                           0x000000011267f694 -[_UIViewLayoutFeedbackLoopDebugger _recordSetNeedsLayoutToLayerOfView:] + 556
	1   UIKitCore                           0x0000000112625d58 -[UIView(Hierarchy) setNeedsLayout] + 389
	2   Pulley                              0x00000001028d7b75 $s6Pulley0A14ViewControllerC13shadowOpacitySfvW + 517
	3   Pulley                              0x00000001028d7968 $s6Pulley0A14ViewControllerC13shadowOpacitySfvs + 136
	4   PulleyDemo                          0x0000000102029494 $s10PulleyDemo27DrawerContentViewControllerC23drawerPositionDidChange0G014bottomSafeAreay0A00aeF0C_12CoreGraphics7CGFloatVtF + 4356
	5   PulleyDemo                          0x000000010202952e $s10PulleyDemo27DrawerContentViewControllerC23drawerPositionDidChange0G014bottomSafeAreay0A00aeF0C_12CoreGraphics7CGFloatVtFTo + 78
	6   Pulley                              0x00000001028fe213 $sTa.64 + 35
	7   Pulley                              0x00000001028f1b9c $s6Pulley0A14ViewControllerC12CoreGraphics7CGFloatVIegyy_AcFIeggy_TR + 12
	8   Pulley                              0x00000001028f0422 $s6Pulley0A14ViewControllerC17setDrawerPosition8position8animated10completionyAA0aF0C_SbySbcSgtF + 6002
	9   Pulley                              0x00000001028ea38c $s6Pulley0A14ViewControllerC21viewDidLayoutSubviewsyyF + 25532
	10  Pulley                              0x00000001028ea4bb $s6Pulley0A14ViewControllerC21viewDidLayoutSubviewsyyFTo + 43
	11  UIKitCore                           0x000000011263abcb -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 3383
	12  QuartzCore                          0x0000000103ffbd87 -[CALayer layoutSublayers] + 258
	13  QuartzCore                          0x0000000104002239 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 575
	14  QuartzCore                          0x000000010400df91 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 65
	15  QuartzCore                          0x0000000103f4e078 _ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd + 496
	16  QuartzCore                          0x0000000103f84e13 _ZN2CA11Transaction6commitEv + 783
	17  UIKitCore                           0x00000001120fb27a __34-[UIApplication _firstCommitBlock]_block_invoke_2 + 81
	18  CoreFoundation                      0x0000000102fdb5db __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
	19  CoreFoundation                      0x0000000102fda9ef __CFRunLoopDoBlocks + 434
	20  CoreFoundation                      0x0000000102fd540c __CFRunLoopRun + 899
	21  CoreFoundation                      0x0000000102fd4b9e CFRunLoopRunSpecific + 567
	22  GraphicsServices                    0x000000011664cdb3 GSEventRunModal + 139
	23  UIKitCore                           0x00000001120ddaf3 -[UIApplication _run] + 912
	24  UIKitCore                           0x00000001120e2a04 UIApplicationMain + 101
	25  PulleyDemo                          0x000000010202b3eb main + 75
	26  libdyld.dylib                       0x000000010daaf415 start + 1
	27  ???                                 0x0000000000000003 0x0 + 3
)
)}
2020-09-23 13:12:07.169428+0800 PulleyDemo[18818:574117] *** Terminating app due to uncaught exception 'NSGenericException', reason: 'Degenerate layout! Layout feedback loop detected in subtree of <UIView: 0x7f95d20056e0; frame = (0 0; 375 812); wants auto layout; hosts layout engine; tAMIC = YES; >. More info may be available in the log for com.apple.UIKit.LayoutLoop'
*** First throw call stack:
(
	0   CoreFoundation                      0x000000010306d126 __exceptionPreprocess + 242
	1   libobjc.A.dylib                     0x0000000102efdf78 objc_exception_throw + 48
	2   CoreFoundation                      0x000000010306cdc7 -[NSException init] + 0
	3   UIKitCore                           0x000000011267fdfc -[_UIViewLayoutFeedbackLoopDebugger dumpInfoWithInfoCollectionSuccess:] + 507
	4   UIKitCore                           0x000000011267e97b -[_UIViewLayoutFeedbackLoopDebugger willSendLayoutSubviewsToView:] + 143
	5   UIKitCore                           0x000000011263a943 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2735
	6   QuartzCore                          0x0000000103ffbd87 -[CALayer layoutSublayers] + 258
	7   QuartzCore                          0x0000000104002239 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 575
	8   QuartzCore                          0x000000010400df91 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 65
	9   QuartzCore                          0x0000000103f4e078 _ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd + 496
	10  QuartzCore                          0x0000000103f84e13 _ZN2CA11Transaction6commitEv + 783
	11  UIKitCore                           0x00000001120fb27a __34-[UIApplication _firstCommitBlock]_block_invoke_2 + 81
	12  CoreFoundation                      0x0000000102fdb5db __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
	13  CoreFoundation                      0x0000000102fda9ef __CFRunLoopDoBlocks + 434
	14  CoreFoundation                      0x0000000102fd540c __CFRunLoopRun + 899
	15  CoreFoundation                      0x0000000102fd4b9e CFRunLoopRunSpecific + 567
	16  GraphicsServices                    0x000000011664cdb3 GSEventRunModal + 139
	17  UIKitCore                           0x00000001120ddaf3 -[UIApplication _run] + 912
	18  UIKitCore                           0x00000001120e2a04 UIApplicationMain + 101
	19  PulleyDemo                          0x000000010202b3eb main + 75
	20  libdyld.dylib                       0x000000010daaf415 start + 1
	21  ???                                 0x0000000000000003 0x0 + 3
)
libc++abi.dylib: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSGenericException', reason: 'Degenerate layout! Layout feedback loop detected in subtree of <UIView: 0x7f95d20056e0; frame = (0 0; 375 812); wants auto layout; hosts layout engine; tAMIC = YES; >. More info may be available in the log for com.apple.UIKit.LayoutLoop'
terminating with uncaught exception of type NSException
CoreSimulator 732.17 - Device: iPhone 11 Pro (901DEF38-B212-44BA-AE59-FE05F1397A01) - Runtime: iOS 14.0 (18A372) - DeviceType: iPhone 11 Pro
(lldb)

ulmentflam · 2020-09-29T22:10:41Z

@150vb I just pushed a new fix for your issue to the xcode12 branch and would love for you to test it before I release it.

150vb · 2020-09-30T01:44:56Z

@ulmentflam Thank you very much, I tested it and it worked fine.

benjaminmestrez · 2020-09-30T12:16:30Z

@150vb I just pushed a new fix for your issue to the xcode12 branch and would love for you to test it before I release it.

@ulmentflam your latest fix on xcode12 branch fixed it for me, thanks 😀.

vladkos · 2020-09-30T15:54:08Z

@150vb I just pushed a new fix for your issue to the xcode12 branch and would love for you to test it before I release it.

For me it's fixed too. @ulmentflam good job. Thx you

ulmentflam · 2020-09-30T19:47:50Z

@150vb @benjaminmestrez @vladkos The latest from the xcode12 branch has been released in version 2.8.4!

ulmentflam · 2020-10-08T19:36:00Z

As this is the home to all issues iOS 14 and Xcode 12, see comments for issues related to dragging scrollview in issue #400

ulmentflam · 2020-10-08T21:20:32Z

More iOS 14 issues have been fixed in release 2.8.5. Please continue to report issues with iOS 14 as you run into them!

ambi1132 · 2020-11-11T11:07:28Z

App is stucking on launch screen as we are initializing the root view controller using pulley library in iOS14. I stucked in this issue from last 2 days.

ulmentflam · 2020-11-20T14:33:28Z

@ambi1132 See my comments on your issue #405

Roman-swift · 2021-04-21T15:20:30Z

@ulmentflam I have it problem now (only on iphone 11 pro, 11 pro max, 12 pro/ iOS 14.4). Pulley version 2.9.0, xCode version 12.4. It works good on other devices.
This is what I know: When i don't send ".open" in func supportedDrawerPositions () -> [PulleyPosition] - no bug. DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) fixed it, but not everything works correctly.
Please, help me

ulmentflam · 2021-04-22T00:38:02Z

@Roman-swift It sounds like there is an auto layout feedback loop in your implementation of the PulleyDrawerViewControllerDelegate as I am not able to replicate this issue on the sample app. You can use this article to debug the auto layout feedback loop.

ulmentflam added a commit that referenced this issue Aug 20, 2020

a fix for the issue with auto layout feedback loops on ios 14 that su…

6a426eb

…pports pannel mode. via issue #390

ulmentflam added a commit that referenced this issue Sep 16, 2020

Prepareing for release, still waiting on feedback for issues via #390

abfdb02

ulmentflam pinned this issue Sep 22, 2020

ulmentflam mentioned this issue Sep 28, 2020

iOS 13 feedback loop with latest release 2.8.3 #396

Closed

ulmentflam added a commit that referenced this issue Sep 29, 2020

Another fix to auto-layout feedback loops via #390

0392414

ulmentflam mentioned this issue Oct 5, 2020

Unable to drag the drawer on iOS 14 #400

Closed

This was referenced Dec 5, 2020

fix: iOS 14 autolayout loop issue l2succes/Pulley#4

Closed

fix: point to Pulley fork with iOS 14 fixes artsy/eigen#4224

Merged

ulmentflam mentioned this issue Apr 19, 2021

Crashing due to loop of broken constraints when changing drawer content VC? #375

Open

ckaynar added a commit to cskaynar/Pulley that referenced this issue Apr 29, 2021

Xcode 12 ios 14 layout loop fixed 52inc#390 (comment)

c890f23

Pulley hangs on iOS 14 Beta 4 #390

Pulley hangs on iOS 14 Beta 4 #390

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