UIView翻转过渡与显示隐藏动画iOS

Question

我正在制作从一个 UIView 到另一个 UIView 的翻转动画，它位于第一个 UIView 的后面并被隐藏。 代码：

UIView.transition(from: mediumFirstView, to: mediumSecondView, 
                  duration: 0.5, options: [.transitionFlipFromRight, 
                                           .showHideTransitionViews]) { _ in
    self.mediumFirstView.isUserInteractionEnabled = false
    self.mediumSecondView.isUserInteractionEnabled = true
}

或者这个：

UIView.transition(with: mediumLimitedView, duration: 0.5, 
                  options: [.transitionFlipFromRight, 
                            .showHideTransitionViews], 
                  animations: {
    self.mediumFirstView.alpha = 0
    self.mediumSecondView.alpha = 1
}) { _ in
    self.mediumFirstView.isUserInteractionEnabled = false
    self.mediumSecondView.isUserInteractionEnabled = true
}

两者的问题是 First UIView 仅在翻转完整动画后才隐藏，而不是预期的一半。难道我做错了什么？

视图层次结构：

Answer 1

它们都对我有用。只需替换 mediumFirstView 和 mediumSecondView 位置即可。

UIView.transition(from: mediumSecondView, to: mediumFirstView, 
              duration: 5.5, options: [.transitionFlipFromRight, 
                                       .showHideTransitionViews]) { _ in
    self.mediumFirstView.isUserInteractionEnabled = false
    self.mediumSecondView.isUserInteractionEnabled = true
}

Answer 2

如果你想为可见性设置动画

UIView.transition(with: mediumLimitedView, duration: 0.5, 
                  options: [.transitionFlipFromRight, 
                            .showHideTransitionViews], 
                  animations: {
    self.mediumFirstView.alpha = 0
    self.mediumSecondView.alpha = 1
}) { _ in
    self.mediumFirstView.isHidden = true
    self.mediumSecondView.isHidden = false
    self.mediumFirstView.isUserInteractionEnabled = false
    self.mediumSecondView.isUserInteractionEnabled = true
}

如果您只需要更新 isHidden - 您可以设置 t/2 秒的计划操作（在您的情况下 t 是 0.5s 秒，因此 t/2 = 0.25s

DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
            [weak self] in
            guard let strongSelf = self else{
                return
            }
            strongSelf.mediumFirstView.isHidden = true
            strongSelf.mediumSecondView.isHidden = false
        }