UIView 的框架被翻转后发生变化

Question

我使用 UIView.transition 方法在 2 个视图之间翻转，但之后，两个视图的框架都发生了变化。

if isFront {
    UIView.transition(from: frontView, to: behindView, duration: 0.5, options: .transitionFlipFromRight,completion: { (finished) in
        if finished {
            self.isFront = false
        }
    })
} else {
    UIView .transition(from: behindView, to: frontView, duration: 0.5, options: .transitionFlipFromLeft, completion: { (finished) in
        if finished {
            self.isFront = true
        }
    })
}

我怎么了？感谢您的帮助。

Answer 1

我解决了同样的问题。问题是当我们使用从视图 A 到视图 B 的翻转过渡时，我们失去了它的约束。

解决方案：

将两个视图（即 frontView 和 behindView）放入 parentView 并使用：

UIView.transition(with: scroller, duration: 0.5, options: .transitionFlipFromLeft,animations: { () -> Void in}, completion: { _ in })

例子：

 @IBAction func FlipButtonAction(_ sender: Any) {
    if(front){            
        frontView.isHidden = true
        behindView.isHidden = false

        UIView.transition(with: parentView, duration: 0.5, options: .transitionFlipFromLeft,animations: { () -> Void in}, completion: { _ in })

        print("1")
    }else{
        frontView.isHidden = false
        behindView.isHidden = true

        UIView.transition(with: parentView, duration: 0.5, options: .transitionFlipFromLeft,animations: { () -> Void in}, completion: { _ in })
        print("2")

    }
    front = !front

}