iOS开发:不显示状态栏

1)在

- (BOOL) application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

方法中添加：

   [application setStatusBarHidden:YES];

2)在一些控制器的

- (void)viewDidLoad 

方法中添加：

 UIApplication *application = [UIApplicationsharedApplication];

    [application setStatusBarHidden:YES];