在开发一个重负荷的UI应用程序时,QA团队报告说,我们的视图“翻转”停止正常工作。Aster测试我们注意到这个问题只针对IOS12。
如果您测试我添加的代码,即使对于只有背景色的两个视图的非常简单的示例,您也会在transitionWith
中看到:正在显示的视图不是动画,只是被隐藏。隐藏的视图正在正确设置动画。
同样,这只是IOS12中的一个问题,在从:到:
class ViewController: UIViewController {
var firstView: UIView!
var secondView: UIView!
var containerView: UIView!
var showBackView = false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//containerView = UIView(frame: CGRect(x: 32, y: 32, width: 128, height: 128)) - // transitionFrom:To Code
// General code
firstView = UIView(frame: CGRect(x: 32, y: 32, width: 128, height: 128))
secondView = UIView(frame: CGRect(x: 32, y: 32, width: 128, height: 128))
firstView.backgroundColor = UIColor.red
secondView.backgroundColor = UIColor.blue
// transitionFrom:To Code
// containerView.addSubview(firstView)
// containerView.addSubview(secondView)
// view.addSubview(containerView)
// transitionWith: Code
view.addSubview(firstView)
view.addSubview(secondView)
self.firstView.isHidden = false
self.secondView.isHidden = true
// General code
let button = UIButton(frame: CGRect(x: 200, y: 200, width: 50, height: 50))
button.addTarget(self, action: #selector(tappedButton), for: .touchUpInside)
button.backgroundColor = UIColor.green
view.addSubview(button)
}
@objc func tappedButton(sender: UIButton!) {
flip()
}
func flip() {
let transitionOptions: UIView.AnimationOptions = [.transitionFlipFromRight, .showHideTransitionViews]
// transitionFrom:To Code
// let toView = showBackView ? firstView : secondView
// let fromView = showBackView ? secondView : firstView
// UIView.transition(from: fromView!, to: toView!, duration: 1.0, options: transitionOptions, completion: nil)
// transitionWith: Code
print("******************")
UIView.transition(with: firstView, duration: 3.0, options: transitionOptions, animations: {
print(self.firstView.isHidden)
print(self.secondView.isHidden)
self.firstView.isHidden = !self.firstView.isHidden
})
print("----------------------")
UIView.transition(with: secondView, duration: 3.0, options: transitionOptions, animations: {
print(self.firstView.isHidden)
print(self.secondView.isHidden)
self.secondView.isHidden = !self.secondView.isHidden
})
}
}
这是已知的问题吗?我在网上找不到任何关于这个的参考资料;不幸的是,这打破了以前的动画。
最佳答案
我通过使用transitionFrom:To解决了这个问题,但这不是一个解决方案,而是一个解决方案。过渡带:仍然刹车在IOS12上!