当我的自定义 segue 动画正在执行时，目标 View 显示为黑色。动画结束后出现 View ，看起来不错。
截图如下:
动画场景:
转场/动画完成后的 View :
这是自定义转场类:
class SegueToPreview: UIStoryboardSegue {
override func perform() {
// Assign the source and destination views to local variables.
var firstVCView = self.sourceViewController.view as UIView!
var secondVCView = self.destinationViewController.view as UIView!
// Get the screen width and height.
let screenWidth = UIScreen.mainScreen().bounds.size.width
let screenHeight = UIScreen.mainScreen().bounds.size.height
// Specify the initial position of the destination view.
secondVCView.frame = CGRectMake(0.0, screenHeight, screenWidth, screenHeight)
// Access the app's key window and insert the destination view above the current (source) one.
let window = UIApplication.sharedApplication().keyWindow
window?.insertSubview(secondVCView, aboveSubview: firstVCView)
// Animate the transition.
UIView.animateWithDuration(0.2, animations: { () -> Void in
firstVCView.frame = CGRectOffset(firstVCView.frame, -screenWidth, 0.0)
secondVCView.frame = CGRectOffset(secondVCView.frame, -screenWidth, 0.0)
}) { (Finished) -> Void in
self.sourceViewController.presentViewController(self.destinationViewController as! UIViewController,
animated: false,
completion: nil)
}
}
虽然 unwind segue 工作正常，显示两个 View 。
我假设在执行动画时未加载 View ，但不知道如何解决。
最佳答案
目标 vc View 的初始位置设置不正确(假设您希望 View 从右侧移入)；你把它放在屏幕下方，而不是屏幕右侧，
secondVCView.frame = CGRectMake(0.0, screenHeight, screenWidth, screenHeight)
这应该是，
secondVCView.frame = CGRectMake(screenWidth, 0, screenWidth, screenHeight)
关于ios - UIStoryboardSegue : view is not displayed during animation，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30715082/