Status bar的显示和隐藏

• 如果想要的效果是启动时隐藏，进入软件之后显示
  • 可以在设置中勾选Hide status bar选项
• View controller-based status bar appearance
  • NO - 代表status bar 的控制权限给了UIApplication
  • YES(默认值) - 代表控制器的优先级比UIApplication高，而且这个时候使用UIApplication控制status bar 将没有效果

最简单的方法(我自己认为)

• 在info.plist中配置View controller-based status bar appearance为NO
• 全部页面都隐藏
  • 在AppDelegate的application:didFinishLaunchingWithOptions:方法中设置
  • [UIApplication sharedApplication].statusBarHidden = YES;
• 有的页面需要隐藏

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [UIApplication sharedApplication].statusBarHidden = YES;
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [UIApplication sharedApplication].statusBarHidden = NO;
}

• 有的页面需要改变状态栏颜色

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent;
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;
}

控制器自己控制状态栏

• 当info.plist中没有对View controller-based status bar appearance设置，默认值是YES

/**
 让当前控制器对应的状态栏改变颜色，是白色还是黑色
 */
- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

/**
 让当前控制器对应的状态栏显示或者隐藏
 */
- (BOOL)prefersStatusBarHidden
{
    return YES;
}