我有一个 sheetView,其顶部边缘始终以父视图中心为中心。
我允许它使用平移手势垂直拖动,当手势结束时,我将 sheetView 动画化回父视图的中心。
但是我想在 sheetView 仍在动画时与其进行交互,并在平移时垂直更改其位置,但我无法做到,它总是完成当前动画然后开始下一个动画。
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
sheetView.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: view.bounds.height)
middlePoint = CGPoint(x: view.bounds.midX, y: view.bounds.height)
sheetView.center = middlePoint
}
@IBAction func handlePan(_ sender: UIPanGestureRecognizer) {
let recognizer = sender
let translation = recognizer.translation(in: self.view)
if recognizer.state == .began {
if animator.isRunning {
animator.stopAnimation(true)
}
animator.addAnimations {
self.sheetView.center = self.middlePoint
}
animator.pauseAnimation()
} else if recognizer.state == .changed {
self.sheetView.center.y += translation.y
} else if recognizer.state == .ended || recognizer.state == .cancelled {
if animator.isRunning {
animator.stopAnimation(true)
}
animator.addAnimations {
self.sheetView.center = self.middlePoint
}
animator.startAnimation()
}
recognizer.setTranslation(CGPoint.zero, in: self.view)
}
你可以在这里找到整个项目:sheetView