隐藏状态栏

在info.plist 添加两个键

View controller-based status bar appearance   YES

Status bar is initially hidden  NO

代码中在要隐藏状态栏的地方（UIViewController 中）

@property (nonatomic, getter = isStatusBarHidden) BOOL statusBarHidden;

#pragma mark - 隐藏状态栏
#pragma mark - Private
-  (BOOL)prefersStatusBarHidden {
    return  self.statusBarHidden ;
}
- (void)toggleStatusBarHiddenWithAppearanceUpdate:(BOOL)updateAppearance
{
    self.statusBarHidden = updateAppearance;
    [UIView animateWithDuration:UINavigationControllerHideShowBarDuration animations:^{
            [self setNeedsStatusBarAppearanceUpdate];
        }];
    
}

[self  toggleStatusBarHiddenWithAppearanceUpdate:YES];

[self  toggleStatusBarHiddenWithAppearanceUpdate:NO];