Crash during animation on dismissed VC

[julien-tamade]

• [ x] I've read, understood, and done my best to follow the *CONTRIBUTING guidelines.

What did you do?

I am running a series of two delayed animations when a view controller appears. override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(100)) { [ weak self] in self?.graphView?.moveViewToAnimated(xValue: 20000, yValue: 0, axis: .left, duration: 0.5, easingOption: .easeOutQuad) DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(750)) { self?.graphView?.moveViewToAnimated(xValue: 0, yValue: 0, axis: .left, duration: 0.5, easingOption: .easeInOutQuad) } } } If the view controller is dismissed mid animation, the app crashes

What did you expect to happen?

I would expect the app not to crash

What happened instead?

The app crashed `open class AnimatedMoveViewJob: AnimatedViewPortJob { internal override func animationUpdate() { var pt = CGPoint( x: xOrigin + (CGFloat(xValue) - xOrigin) phase, y: yOrigin + (CGFloat(yValue) - yOrigin) phase )

    transformer.pointValueToPixel(&pt)
    viewPortHandler.centerViewPort(pt: pt, chart: view)
}

} it crashed on the linetransformer.pointValueToPixel(&pt)`

Charts Environment

Charts version/Branch/Commit Number: 4.1.0 Xcode version:14.0.1 Swift version:5 Platform(s) running Charts:iOS macOS version running Xcode:12.6

Demo Project

[fengli12321]

Same problem，did you solve it? May you can back to v3.6.0

[fengli12321]

Same problem，did you solve it? May you can back to v3.6.0 When VC pop or dismiss, 'transformer' and 'viewPortHandler' will be released, so it crashed. In old version (v3.6.0)， this property is modifiered by 'weak', so It run good

[ChanRoy]

Same problem

[Toj-dev]

Same problem