iphone - 使用 CATransitions 切换视图的问题

Question

所以我试图使用这段代码在视图之间切换：

CATransition *applicationLoadViewIn = [CATransition animation];

    [applicationLoadViewIn setDuration:1];

    [applicationLoadViewIn setType:kCATransitionReveal];

    [applicationLoadViewIn setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];

    MyViewControllerClass *theControllerIAmSwitchingTo = [[MyViewControllerClass alloc] init];

    [[theControllerIAmSwitchingTo.view layer] addAnimation:applicationLoadViewIn forKey:kCATransitionReveal];

但是，代码不起作用。没有错误，代码执行得很好，但它什么也没做。我在这里有什么问题？

Answer 1

您需要将动画添加到父视图的图层，然后将视图添加为父视图的子视图。

所以而不是

[[theControllerIAmSwitchingTo.view layer] addAnimation:applicationLoadViewIn forKey:kCATransitionReveal];

你需要使用

[parentView.layer addAnimation:animation forKey:kCATransitionReveal];
[parentView addSubview:theControllerIAmSwitchingTo.view];

Answer 2

就像这样做：

 CATransition *applicationLoadViewIn = [CATransition animation];

    [applicationLoadViewIn setDuration:1];

    [applicationLoadViewIn setType:kCATransitionReveal];

    [applicationLoadViewIn setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];

    MyViewControllerClass *theControllerIAmSwitchingTo = [[MyViewControllerClass alloc] init];

    [[theControllerIAmSwitchingTo.view layer] addAnimation:applicationLoadViewIn forKey:kCATransitionReveal];

    [self.navigationController pushViewController:theControllerIAmSwitchingTo animated:NO];

我注意到问题是您没有在导航堆栈中添加视图，这就是为什么您的视图没有被加载并且您看不到动画的原因。