1. 把当前页面的状态栏隐藏
[[UIApplication sharedApplication] setStatusBarHidden:TRUE];
2. 把整个应用程序的状态栏都隐藏掉
在info.plist上添加一项:Status bar is initially hidden,value为YES;
完后在AppDelegate.m的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions方法里面加入此代码
[[UIApplication sharedApplication]setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];