隐藏状态栏

-(void)viewWillDisappear:(BOOL)animated

{

    [super viewWillDisappear:animated];

    [[UIApplication sharedApplication] setStatusBarHidden:NO];

     

}

-(void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    [[UIApplication sharedApplication] setStatusBarHidden:YES];

}