ios state bar 隐藏

[UIApplicationsharedApplication].statusBarHidden = YES;

    if ([UIApplicationsharedApplication].statusBarHidden == NO)

    {

        //iOS7，需要plist里设置 View controller-based status bar appearance 为NO

        [[UIApplicationsharedApplication] setStatusBarHidden:YESwithAnimation:UIStatusBarAnimationSlide];

    }