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iOS 15 broke the navigation appearance when navigating to a view controller with a transparent navigation bar from a non-transparent navigation bar
On iOS 15, when navigating to a view controller that has a transparent navigation bar, the navbar animation isn't working as expected. It works as expected on iOS versions prior to 15. Please see attached video for iOS 14 Here's a video demonstration: https://www.dropbox.com/s/80d7qxzhql8fjj2/ios15%20transparent%20navbar%20delay.mov?dl=0 Demo project on Github: https://github.com/karlingen/NavigationTest This is how I've set up my view controllers: rootVC let appearance = UINavigationBarAppearance() appearance.configureWithDefaultBackground() appearance.backgroundColor = UIColor.red self.navigationController?.navigationBar.standardAppearance = appearance self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance firstVC let appearance = UINavigationBarAppearance() appearance.configureWithTransparentBackground() self.navigationController?.navigationBar.standardAppearance = appearance self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance secondVC let appearance = UINavigationBarAppearance() appearance.configureWithDefaultBackground() appearance.backgroundColor = UIColor.yellow self.navigationController?.navigationBar.standardAppearance = appearance self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance The transition from secondVC to firstVC is smooth (going from yellow to transparent) but not from rootVC to firstVC (going from red to transparent): Has anyone found a workaround for this?
Topic: UI Frameworks SubTopic: UIKit Tags:
2
0
8.9k
Sep ’21
Setting background-color property of an HTML element with children in Safari iOS 15 doesn't work without manually redrawing the DOM element
The following way of setting the background color of an anchor tag in Safari on iOS 15 isn't working: <html> <head></head> <body><p><a class="content" href="#"><strong><span>Some content with background</span></strong></a> </p> <br /> <button onclick="javascript:onClick();">Click me to change content's background color</button> <script> function onClick(){ var element = document.getElementsByClassName('content')[0]; element.style.backgroundColor = "#888888"; } </script> </body> </html> I had to run the following hack after setting the backgroundColor in order for it to work: // Temporary workaround to redraw the element: var disp = element.style.display; element.style.display = 'none'; var trick = element.offsetHeight; element.style.display = disp; Video demonstration: https://www.dropbox.com/s/2z4kmsypj4ov4sd/iOS%2015%20webkit%20bug.mov?dl=0 Surely this is a bug in Safari unless I might've missed something?
Topic: Safari & Web SubTopic: General Tags:
1
0
3.2k
Oct ’21
Modifying the Y-position of navigation bar isn't possible in iOS 15.1 Beta / iOS 15 simulators
Our logic for modifying the navigation bar isn't working on devices running iOS 15.1 Beta or simulators running iOS 15.0 on Xcode 13. When scrolling, we want to change the position of the navigation bar so that it goes off screen to enable a so called fullscreen mode. Create a scroll view and implement UIScrollViewDelegate Inside scrollViewDidScroll, modify the Y-position of self.navigationController.navigationBar.frame Launch the app and scroll vertically Expected: Navbar is moved off screen when you scroll down and comes back when you scroll up. Actual: Navbar stays in position at all times. Workarounds: Use iOS 14 or below Here are two video demonstrations of Expected VS Actual results: iOS 14.5: https://www.dropbox.com/s/kplb13taioxrw7g/iOS14.5_scroll.mov?dl=0 iOS 15.0: https://www.dropbox.com/s/uyvy6oxcgi1wj8i/iOS15_scroll.mov?dl=0 Code: func scrollViewDidScroll(_ scrollView: UIScrollView) { if let navController = self.navigationController { var navBarFrame = navController.navigationBar.frame // Change y-position let newYPosition = min(0, max(-(navbarHeight), (scrollView.contentOffset.y * -1))) + statusBarHeight navBarFrame.origin.y = newYPosition navController.navigationBar.frame = navBarFrame NSLog("New Y positon: %f", newYPosition) } } And here's the full demo project: https://github.com/karlingen/NavbarHideOnScroll Is this a bug?
Topic: UI Frameworks SubTopic: UIKit Tags:
4
0
3.7k
Oct ’21
[iOS 18.4 Beta 2-4] WKWebView content inset causes content touches to be off inside the web view
Background On iOS 18.4 beta, setting a content inset on a WKWebView causes touch events inside the web view to be offset by the content inset amount. In other words, if the web view has a top content inset of 75 points, I must tap 75 points above the intended element for the touch to register correctly. This makes any web content unusable when a content inset is present. A sample app demonstrating the issue is available here: GitHub - iOS18.4-Webview-Bug. The issue does not occur in iOS 18.3 or 18.2. Bug Report The bug has been reported and fixed at WebKit Bug 289715 and also filed as rdar://147075945. Question Will the fix be included in the upcoming iOS 18.4 beta release (Beta 5) or soon thereafter?
Topic: Safari & Web SubTopic: General Tags:
3
3
317
Mar ’25
AVMutableComposition audio silently drops on iOS 26 when streaming over HTTP/2 (FB22696516)
We've discovered a regression in iOS 26 where AVMutableComposition silently drops audio when the source asset is streamed over HTTP/2. The same file served over HTTP/1.1 plays audio correctly through the same composition code. Direct AVPlayer playback (without composition) works fine on HTTP/2. This did not occur on iOS 18.x. It happens on physical devices only. It does not reproduce on a simulator or on macOS. Tested conditions (same MP4 file, different CDNs): CloudFront (HTTP/2) + Composition → ❌ Audio silent Cloudflare (HTTP/2) + Composition → ❌ Audio silent Akamai (HTTP/1.1) + Composition → ✅ Audio works Apple TS (HTTP/1.1) + Composition → ✅ Audio works Downloaded locally, then composed → ✅ Audio works Direct playback, no composition (HTTP/2) → ✅ Audio works The CloudFront and Akamai URLs serve the identical file — same S3 object, different CDN edge. CDN vendor doesn't matter; any HTTP/2 source triggers it. Minimal reproduction: let asset = AVURLAsset(url: http2URL) let videoTrack = try await asset.loadTracks(withMediaType: .video).first! let audioTrack = try await asset.loadTracks(withMediaType: .audio).first! let duration = try await asset.load(.duration) let composition = AVMutableComposition() let fullRange = CMTimeRange(start: .zero, end: duration) let compVideo = composition.addMutableTrack(withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid)! try compVideo.insertTimeRange(fullRange, of: videoTrack, at: .zero) let compAudio = composition.addMutableTrack(withMediaType: .audio, preferredTrackID: kCMPersistentTrackID_Invalid)! try compAudio.insertTimeRange(fullRange, of: audioTrack, at: .zero) let item = AVPlayerItem(asset: composition.copy() as! AVComposition) player.replaceCurrentItem(with: item) player.play() // Video plays, audio goes silent after a while Playing the same asset directly works fine: player.replaceCurrentItem(with: AVPlayerItem(asset: asset)) player.play() // Both video and audio work Filed as FB22696516 Sample project: https://github.com/karlingen/AVCompositionBug
Topic: Media Technologies SubTopic: Streaming Tags:
1
8
168
2d
iOS 15 broke the navigation appearance when navigating to a view controller with a transparent navigation bar from a non-transparent navigation bar
On iOS 15, when navigating to a view controller that has a transparent navigation bar, the navbar animation isn't working as expected. It works as expected on iOS versions prior to 15. Please see attached video for iOS 14 Here's a video demonstration: https://www.dropbox.com/s/80d7qxzhql8fjj2/ios15%20transparent%20navbar%20delay.mov?dl=0 Demo project on Github: https://github.com/karlingen/NavigationTest This is how I've set up my view controllers: rootVC let appearance = UINavigationBarAppearance() appearance.configureWithDefaultBackground() appearance.backgroundColor = UIColor.red self.navigationController?.navigationBar.standardAppearance = appearance self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance firstVC let appearance = UINavigationBarAppearance() appearance.configureWithTransparentBackground() self.navigationController?.navigationBar.standardAppearance = appearance self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance secondVC let appearance = UINavigationBarAppearance() appearance.configureWithDefaultBackground() appearance.backgroundColor = UIColor.yellow self.navigationController?.navigationBar.standardAppearance = appearance self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance The transition from secondVC to firstVC is smooth (going from yellow to transparent) but not from rootVC to firstVC (going from red to transparent): Has anyone found a workaround for this?
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
2
Boosts
0
Views
8.9k
Activity
Sep ’21
Setting background-color property of an HTML element with children in Safari iOS 15 doesn't work without manually redrawing the DOM element
The following way of setting the background color of an anchor tag in Safari on iOS 15 isn't working: <html> <head></head> <body><p><a class="content" href="#"><strong><span>Some content with background</span></strong></a> </p> <br /> <button onclick="javascript:onClick();">Click me to change content's background color</button> <script> function onClick(){ var element = document.getElementsByClassName('content')[0]; element.style.backgroundColor = "#888888"; } </script> </body> </html> I had to run the following hack after setting the backgroundColor in order for it to work: // Temporary workaround to redraw the element: var disp = element.style.display; element.style.display = 'none'; var trick = element.offsetHeight; element.style.display = disp; Video demonstration: https://www.dropbox.com/s/2z4kmsypj4ov4sd/iOS%2015%20webkit%20bug.mov?dl=0 Surely this is a bug in Safari unless I might've missed something?
Topic: Safari & Web SubTopic: General Tags:
Replies
1
Boosts
0
Views
3.2k
Activity
Oct ’21
Modifying the Y-position of navigation bar isn't possible in iOS 15.1 Beta / iOS 15 simulators
Our logic for modifying the navigation bar isn't working on devices running iOS 15.1 Beta or simulators running iOS 15.0 on Xcode 13. When scrolling, we want to change the position of the navigation bar so that it goes off screen to enable a so called fullscreen mode. Create a scroll view and implement UIScrollViewDelegate Inside scrollViewDidScroll, modify the Y-position of self.navigationController.navigationBar.frame Launch the app and scroll vertically Expected: Navbar is moved off screen when you scroll down and comes back when you scroll up. Actual: Navbar stays in position at all times. Workarounds: Use iOS 14 or below Here are two video demonstrations of Expected VS Actual results: iOS 14.5: https://www.dropbox.com/s/kplb13taioxrw7g/iOS14.5_scroll.mov?dl=0 iOS 15.0: https://www.dropbox.com/s/uyvy6oxcgi1wj8i/iOS15_scroll.mov?dl=0 Code: func scrollViewDidScroll(_ scrollView: UIScrollView) { if let navController = self.navigationController { var navBarFrame = navController.navigationBar.frame // Change y-position let newYPosition = min(0, max(-(navbarHeight), (scrollView.contentOffset.y * -1))) + statusBarHeight navBarFrame.origin.y = newYPosition navController.navigationBar.frame = navBarFrame NSLog("New Y positon: %f", newYPosition) } } And here's the full demo project: https://github.com/karlingen/NavbarHideOnScroll Is this a bug?
Topic: UI Frameworks SubTopic: UIKit Tags:
Replies
4
Boosts
0
Views
3.7k
Activity
Oct ’21
Modify accessibilityLabel for the restore button in AVPictureInPictureController
Is it possible to modify the accessibility labels of the buttons shown in the Picture In Picture Window? It currently reads out  "Restore Full Screen" but we want it to say "Exit Picture in Picture"
Topic: App & System Services SubTopic: Core OS Tags:
Replies
0
Boosts
0
Views
685
Activity
Sep ’22
[iOS 18.4 Beta 2-4] WKWebView content inset causes content touches to be off inside the web view
Background On iOS 18.4 beta, setting a content inset on a WKWebView causes touch events inside the web view to be offset by the content inset amount. In other words, if the web view has a top content inset of 75 points, I must tap 75 points above the intended element for the touch to register correctly. This makes any web content unusable when a content inset is present. A sample app demonstrating the issue is available here: GitHub - iOS18.4-Webview-Bug. The issue does not occur in iOS 18.3 or 18.2. Bug Report The bug has been reported and fixed at WebKit Bug 289715 and also filed as rdar://147075945. Question Will the fix be included in the upcoming iOS 18.4 beta release (Beta 5) or soon thereafter?
Topic: Safari & Web SubTopic: General Tags:
Replies
3
Boosts
3
Views
317
Activity
Mar ’25
AVMutableComposition audio silently drops on iOS 26 when streaming over HTTP/2 (FB22696516)
We've discovered a regression in iOS 26 where AVMutableComposition silently drops audio when the source asset is streamed over HTTP/2. The same file served over HTTP/1.1 plays audio correctly through the same composition code. Direct AVPlayer playback (without composition) works fine on HTTP/2. This did not occur on iOS 18.x. It happens on physical devices only. It does not reproduce on a simulator or on macOS. Tested conditions (same MP4 file, different CDNs): CloudFront (HTTP/2) + Composition → ❌ Audio silent Cloudflare (HTTP/2) + Composition → ❌ Audio silent Akamai (HTTP/1.1) + Composition → ✅ Audio works Apple TS (HTTP/1.1) + Composition → ✅ Audio works Downloaded locally, then composed → ✅ Audio works Direct playback, no composition (HTTP/2) → ✅ Audio works The CloudFront and Akamai URLs serve the identical file — same S3 object, different CDN edge. CDN vendor doesn't matter; any HTTP/2 source triggers it. Minimal reproduction: let asset = AVURLAsset(url: http2URL) let videoTrack = try await asset.loadTracks(withMediaType: .video).first! let audioTrack = try await asset.loadTracks(withMediaType: .audio).first! let duration = try await asset.load(.duration) let composition = AVMutableComposition() let fullRange = CMTimeRange(start: .zero, end: duration) let compVideo = composition.addMutableTrack(withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid)! try compVideo.insertTimeRange(fullRange, of: videoTrack, at: .zero) let compAudio = composition.addMutableTrack(withMediaType: .audio, preferredTrackID: kCMPersistentTrackID_Invalid)! try compAudio.insertTimeRange(fullRange, of: audioTrack, at: .zero) let item = AVPlayerItem(asset: composition.copy() as! AVComposition) player.replaceCurrentItem(with: item) player.play() // Video plays, audio goes silent after a while Playing the same asset directly works fine: player.replaceCurrentItem(with: AVPlayerItem(asset: asset)) player.play() // Both video and audio work Filed as FB22696516 Sample project: https://github.com/karlingen/AVCompositionBug
Topic: Media Technologies SubTopic: Streaming Tags:
Replies
1
Boosts
8
Views
168
Activity
2d