滚动隐藏statusbar

@property (assign,nonatomic) BOOL hiddenStatusBar;

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

    if (scrollView.contentOffset.y >108) {

        self.hiddenStatusBar =YES;

    }

    else {

        self.hiddenStatusBar =NO;

    }

    [selfsetNeedsStatusBarAppearanceUpdate];

}

- (UIStatusBarStyle)preferredStatusBarStyle

{

    returnUIStatusBarStyleLightContent;

}

- (BOOL)prefersStatusBarHidden

{

    if (self.hiddenStatusBar >0) {

        returnYES;

    }

    else {

        returnNO;

    }

}

2.

    [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:YES];

    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];