【UIKit-125-6】#import

【子视图控制器的lifeCycle】

@interface UIViewController (UIContainerViewControllerCallbacks)

- (BOOL)shouldAutomaticallyForwardAppearanceMethods NS_AVAILABLE_IOS(6_0);

//该方法返回NO则childViewController不会自动viewWillAppear和viewWillDisappear对应的方法
- (BOOL)shouldAutomaticallyForwardAppearanceMethods
{
    return NO;
}

//都写在子视图控制器中。

- (void)willMoveToParentViewController:(UIViewController *)parent NS_AVAILABLE_IOS(5_0);

- (void)didMoveToParentViewController:(UIViewController *)parent NS_AVAILABLE_IOS(5_0);

-(void)willMoveToParentViewController:(UIViewController *)parent{
    NSLog(@"willmoveto");//add时调用
}

-(void)didMoveToParentViewController:(UIViewController *)parent{
    NSLog(@"didmoveto");//remove时调用
}

@end