IOS筆記 : addChildViewController

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一下addChildViewController，一個ViewController可以添加多個子ViewController，但是這 些子ViewController只有一個是顯示到父視圖中的，可以通過transitionFromViewController:toViewController:duration:options:animations:completion:這個方法轉換顯示的子視圖。同時加入相應的動畫。

 

 //在parent view controller 中添加 child view controller　　 FirstViewController *firstViewController=[[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];    [self addChildViewController:firstViewController];        SecondViewController *secondViewController=[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];    [self addChildViewController:secondViewController];        ThirdViewController *thirdViewController=[[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];    [self addChildViewController:thirdViewController];        [self.view  addSubview:thirdViewController.view];　　// addChildViewController回調用[child willMoveToParentViewController:self] ，但是不會調用didMoveToParentViewController，所以需要顯示調用    [thirdViewController didMoveToParentViewController:self];    currentViewController=thirdViewController;    　　//切換child view controller     [self transitionFromViewController:currentViewController toViewController:firstViewController duration:4 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{            }  completion:^(BOOL finished) {               //......            }];    currentViewController=firstViewController;　　//移除child view controller    // removeFromParentViewController在移除child前不會調用[self willMoveToParentViewController:nil] ，所以需要顯示調用    [currentViewController willMoveToParentViewController:nil];    [currentViewController removeFromSuperview];    [currentViewController removeFromParentViewController];

　　

IOS筆記 : addChildViewController