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1answer
64views
Why does Core Animation have a delay compared to Core Graphics?
I am trying to implement a custom UISlider on an iOS device.First, the ThumbSlider is positioned on both ends, and the desired behavior is as follows: When the ThumbSlider moves left or right, the ...
- 1
1vote
2answers
343views
CAMetalDisplayLink does not work on separate thread
I am looking to implement CAMetalDisplayLink on a separate thread on a macOS application. I am basing my implementation on the following example project:Achieving Smooth Frame Rates with Metal ...
- 119
1vote
1answer
188views
How to animate a path from SwiftUI?
I know how to animate a single property like StrokeStart/StrokeEnd, or pairs of properties. I'm talking about what you can do from CoreAnimation: Create an animation that animates replacing one path ...
- 132k
0votes
1answer
135views
Apply CATransform3D to CALayer and save result in UIGraphicsImageRendererContext
I have an 4x4 transformation matrix that is converted to CATransform3D. I need to apply it a UIImage and save as a new image in Documents folder. Any transformations that I can apply to cgcontext ...
- 639
-1votes
1answer
143views
Using CALayer.speed to finish running animation
Suppose I have a long running task whose progress is displayed in custom progress bar similar to system progress bar. A task can finish faster than animation of CALayer.bounds from leading to trailing ...
-1votes
1answer
126views
How to get Spring Animations with Constraints to behave properly?
Trying to get a spring animation to work properly. I made a git repo. Basically the red view is constrained as follows:let ac = brokenView.widthAnchor.constraint(equalTo: brokenView.heightAnchor, ...
-1votes
1answer
31views
When an animation completes, should the "success" value be passed to "completeTransition"?
I have a class which supports UIViewControllerAnimatedTransitioning.Within is a func namedfunc animateTransition(using transitionContext: UIViewControllerContextTransitioning)Within that, I'm ...
- 4,471
1vote
1answer
52views
Why is a CALayer retained after I stop referencing it?
I've the impression that my CALayer is retained after being added as a sublayer until the end execution block, instead of until I stop referencing it.The parent UIView is however released as soon as ...
- 10.6k
0votes
0answers
2kviews
App crashes of type EXC_BREAKPOINT (SIGTRAP) SIGNAL 5 Trace/BPT trap on iOS17
I'm encountering crashes of type EXC_BREAKPOINT (SIGTRAP) Termination Reason: SIGNAL 5 Trace/BPT trap: 5 on iOS 17.In the iOS app I'm developing, I've noticed that since upgrading to iOS 17 (Xcode 15....
- 197
0votes
0answers
37views
Animation in UICollectionViewCell Stops When Reloading Array Data
When using a UICollectionViewCell with animation triggered by a gesture recognizer, the animation stops abruptly when the array data associated with the collection view is reloaded using reloadData() ...
-2votes
1answer
75views
Unity to Xcode Semantic Issue Error please assist
Hello guys this is my first time trying to publish an App on iOS. I am using Xcode version 13.0 betaI am getting this Semantic Issue error while archiving and building the App on Xcode.if (@...
1vote
1answer
73views
Why is .animation(_:,value:) affectes other properties' change in SwifftUI?
I have three properties. Two with different animations on change and one with no animation.struct Stick: View { var color: Color var body: some View { GeometryReader { ...
- 135
0votes
2answers
52views
UILabel displays colors beneath it [duplicate]
I have a non-transparent UIView with UILabel of white non-transparent color. I display it as a subview in some view with border. And I can see that border in my UILabel's letters...By the way, I've ...
1vote
0answers
67views
Why are my exported Core Animation layers blurry on iOS (only in a 16:9 aspect ratio) and on Mac Catalyst (any aspect ratio)?
Seeing this with watermark image and text layers that each back a UIView // Create the video layer. let videolayer = CALayer() videolayer.shouldRasterize = true ...
- 346
1vote
1answer
163views
How do I work around a Mac Catalyst framework bug where no Core Animation output is shown in an export session?
This is verified to be a framework bug (occurs on Mac Catalyst but not iOS or iPadOS), and it seems the culprit is AVVideoCompositionCoreAnimationTool?/// Exports a video with the target animating. ...
- 346
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