问题描述
当顶视图控制器从我的导航控制器中弹出时,我目前需要实现一些代码.有没有办法检测视图控制器何时从导航控制器堆栈中弹出?
我想尽可能避免使用 viewWillDisappear
或 viewDidDisappear
因为我在我的项目中使用了 splitview
,并且在主视图中选择不同的行也会触发 viewWillDisappear
/viewDidDisappear
方法.
您可以使用视图控制器的 isMovingFromParentViewController
属性来检测视图是否正在弹出,如下所示:
- (void)viewWillDisappear:(BOOL)animated{[超级viewWillDisappear:动画];if ([self isMovingFromParentViewController]){NSLog(@"视图控制器被弹出");}别的{NSLog(@"新的视图控制器被推送");}}
isMovingFromParentViewController
返回一个布尔值,表示视图控制器在从父级中移除的过程.
I currently need to implement some code when the top view controller is being popped off from my navigation controller. Is there a way to detect when the view controller is being popped off the navigation controller stack?
As much as possible I want to stay away from using viewWillDisappear
or viewDidDisappear
because I'm using a splitview
in my project, and selecting a different row in the master view will also trigger the viewWillDisappear
/viewDidDisappear
methods.
You can detect whether a view is being popped using the isMovingFromParentViewController
property for a view controller as shown below:
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
if ([self isMovingFromParentViewController])
{
NSLog(@"View controller was popped");
}
else
{
NSLog(@"New view controller was pushed");
}
}
这篇关于如何检测是否从导航控制器弹出视图控制器?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!