UIView 的 viewDidDisappear | viewDidDisappear

本文介绍了UIView 的 viewDidDisappear的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在主视图中添加了这样的子视图:

I've added a sub view like this in the main view:

    BTLPXYPad *XYPad = [[BTLPXYPad alloc] initWithFrame: CGRectMake (30, 10, 280, 460)];
    [window addSubview:XYPad];

完成我需要的所有工作，然后在 BTLPXYPad 类中使用它删除它:

done all my bits that i need to and then removed it using this in the BTLPXYPad class:

    [self removeFromSuperview];

我需要的是在任务结束后执行任务.我知道使用 UIViewController 类型类我可以使用 viewDidDissapear 但我似乎无法为 UIView 类型找到相同的东西.请问有人可以帮忙吗?

What I need is to perform a task once it has gone. I know that with a UIViewController type class I could use viewDidDissapear but I can't seem to find the same thing for a UIView Type. Can anyone help please?

推荐答案

要知道您的视图何时被实际删除，您可以实现 didMoveToSuperview 并检查 superview 现在是否为 nil

To know when you a view has actually been removed you could implement didMoveToSuperview and check if the superview is now nil

- (void)didMoveToSuperview;
{
  [super didMoveToSuperview];

  if (!self.superview) {
    NSLog(@"Removed from superview");
  }
}

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