状态栏与导航栏的隐藏或显示操作

状态栏的隐藏或显示操作

1、显示

[UIApplication sharedApplication].statusBarHidden = NO;

2、隐藏

[[UIApplication sharedApplication] setStatusBarHidden:YES];

3、重写方法 prefersStatusBarHidden

- (BOOL)prefersStatusBarHidden
{
return YES;
}

导航栏的隐藏或显示操作
注：该方法能避免视图控制器相互跳转时，导航栏显示黑色区域

1、显示

[self.navigationController setNavigationBarHidden:NO animated:YES];

2、隐藏

[self.navigationController setNavigationBarHidden:YES animated:YES];

3、或通过代理方法实现

self.navigationController.delegate = self;

#pragma mark UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if ([viewController isEqual:self])
{
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
else
{
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
}