在info.plist 添加两个键
View controller-based status bar appearance YES
Status bar is initially hidden NO
代码中在要隐藏状态栏的地方（UIViewController 中）
@property (nonatomic, getter = isStatusBarHidden) BOOL statusBarHidden;
#pragma mark - 隐藏状态栏 #pragma mark - Private - (BOOL)prefersStatusBarHidden { return self.statusBarHidden ; } - (void)toggleStatusBarHiddenWithAppearanceUpdate:(BOOL)updateAppearance { self.statusBarHidden = updateAppearance; [UIView animateWithDuration:UINavigationControllerHideShowBarDuration animations:^{ [self setNeedsStatusBarAppearanceUpdate]; }]; }
[self toggleStatusBarHiddenWithAppearanceUpdate:YES];
[self toggleStatusBarHiddenWithAppearanceUpdate:NO];
原文：http://www.cnblogs.com/tangbinblog/p/4095796.html