UIViewPropertyAnimator with a UISpringTimingParameters timingParameters doesn't respect its duration when keyframes are involved
Originator: | lap.felix | ||
Number: | rdar://39495559 | Date Originated: | 17-Apr-2018 01:46 PM |
Status: | Open | Resolved: | |
Product: | iOS + SDK | Product Version: | iOS 11.3 |
Classification: | UI/Usability | Reproducible: | Always |
( FB5718374 ) Summary: UIViewPropertyAnimator doesn’t respect its duration if keyframes are used and a UISpringTimingParameters object is passed as timingParameters. Keyframes work well with a normal duration. Steps to Reproduce: Initialize a UIViewPropertyAnimator with `- (instancetype)initWithDuration:(NSTimeInterval)duration timingParameters:(id <UITimingCurveProvider>)parameters` and pass 0.1 seconds as duration and a UISpringTimingParameters instance. Then add an animation which includes keyframes and start the animator. Expected Results: The animation should last 0.1 seconds. Actual Results: The animation appears to have a linear curve and lasts 0.1 seconds Version: iOS 11.3 Notes:
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Link to sample project
https://dsc.cloud/felix/UIViewPropertyAnimator-keyframes-bug.zip