swift如何在两个UIViews之间切换动画

Question

我正在尝试创建一个IOS应用程序，并在按下一些按钮时翻转两个视图。我找到了翻转动画，但我希望翻转在翻转90°时将内容更改为新视图，而不是在动画完成时。这是我的函数：

func animationFlip(fromView:UIView, toView:UIView, animationTime:Float)
{

    UIView.animateWithDuration(NSTimeInterval(animationTime), animations: {

        UIView.setAnimationTransition(UIViewAnimationTransition.FlipFromRight, forView: fromView, cache: true)

        },completion:{completion in
            UIView.animateWithDuration(NSTimeInterval(animationTime), animations: { () -> Void in

                fromView.hidden = true;
                toView.hidden = false;
                UIView.setAnimationTransition(UIViewAnimationTransition.FlipFromRight, forView: toView, cache: true)


            })
    })
}

我找到了这段代码，它看起来很有用，但它是用obj-c编写的。如何将其翻译为swift？

[UIView transitionFromView:viewToReplace
        toView:replacementView
        duration:1
        options:UIViewAnimationOptionTransitionFlipFromBottom
        completion:nil];

提前感谢！

Answer 1

在Swift中：

UIView.transitionFromView(viewToReplace, toView: replacementView, duration: 1, options: .TransitionFlipFromBottom, completion: { _ in })