如何在iOS中使用动画显示/隐藏UIView？(How to show/hide a UIView with animation in iOS?)

如何在iOS中使用动画显示/隐藏UIView？(How to show/hide a UIView with animation in iOS?)

主UIView包含两个子视图 - UIView_1和UIView_2 。 在UIView_2 ，有一个按钮可以显示或隐藏UIView_1 。 例如，当用户触摸按钮以显示UIView_1 ， UIView_1将滑下， UIView_2将随着转换向下推 。 我对动画知之甚少。 有人可以给我看一些示例代码以供参考吗？ 我应该使用CGAffineTransformMakeTranslation吗？ 谢谢。

The main UIView contains two subviews - UIView_1 and UIView_2. In the UIView_2, there is a button to show or hide the UIView_1. For example, when a user touches the button to show the UIView_1, then UIView_1 will slide down and UIView_2 will push downwards with transition. I have very little knowledge in animation. Can someone show me some sample code for reference? Should I use CGAffineTransformMakeTranslation? Thanks.

最满意答案

你不需要任何如此复杂的东西。 只需更改视图的帧大小。

NSTimeInterval animationDuration = /* determine length of animation */; CGRect newFrameSize = /* determine what the frame size should be */; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:animationDuration]; theViewToChange.frame = newFrameSize; [UIView commitAnimations];

You don't need anything so complex. Just change the view's frame size.

NSTimeInterval animationDuration = /* determine length of animation */; CGRect newFrameSize = /* determine what the frame size should be */; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:animationDuration]; theViewToChange.frame = newFrameSize; [UIView commitAnimations];