ios隐藏系统状态栏

转载一些自己以前的文章
https://my.oschina.net/Jerod/blog/632176

info.plist 文件中，View controller-based status bar appearance 的状态不同,隐藏系统状态栏的方法也不同.
一、View controller-based status bar appearance 设为 NO
用下面的方法隐藏状态栏:

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

二、View controller-based status bar appearance 设为 YES
此时,使用下面的方法隐藏:

//更新status bar的显示
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    if ([self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)])
    {
        [self prefersStatusBarHidden];
        [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
    }
}

- (BOOL)prefersStatusBarHidden
{
    return YES;
}