如何检测UIStatusBar的隐藏和显示? [英] How can I detect UIStatusBar hide and show?

问题描述

我正在尝试检测iPhone的UIStatusBar的隐藏和显示，但失败了.有什么解决方案可以帮助我，例如KVO或其他吗?

I'm trying to detect hidden and show of iPhone's UIStatusBar but failed. Are there any solution can help me, like KVO or something else?

推荐答案

您可以观察共享的UIApplication实例的statusBarHidden属性.

You can observe the statusBarHidden property of the shared UIApplication instance.

简单的例子:

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    // Do something here...
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    [[UIApplication sharedApplication] addObserver:self forKeyPath:@"statusBarHidden" options:NSKeyValueObservingOptionNew context:NULL];
    [[UIApplication sharedApplication] setStatusBarHidden:YES]; // Will notify the observer about the change
}

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