// iOS 7
[self prefersStatusBarHidden];
[self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
}
- (BOOL)prefersStatusBarHidden
{
return YES;//隐藏为YES，显示为NO
}
或者设置plist文件全局
设置key：Status bar is initially hidden YES
设置key：View controller-based status bar appearance NO