iOS 隐藏状态栏

 1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 2     // Override point for customization after application launch.
 3     if ([UIDevice currentDevice].systemVersion.floatValue < 7.0) {
 4         [UIApplication sharedApplication].statusBarHidden = YES;
 5     }
 6     else if ([self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)])
 7     {
 8         // iOS7及以上
 9         [self prefersStatusBarHidden];
10         //这个是更新状态栏的显示状态,只支持iOS7及以上,使用performSelector是为了不影响主线程的其他工作
11         [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
12     }
13     return YES;
14 }
15 
16 - (BOOL)prefersStatusBarHidden
17 {
18     return YES;//隐藏为YES，显示为NO
19 }