IOS笔记 : addChildViewController
一下addChildViewController,一个ViewController可以添加多个子ViewController,但是这 些子ViewController只有一个是显示到父视图中的,可以通过transitionFromViewController:toViewController:duration:options:animations:completion:这个方法转换显示的子视图。同时加入相应的动画。
//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回调用[child willMoveToParentViewController:self] ,但是不会调用didMoveToParentViewController,所以需要显示调用 [thirdViewController didMoveToParentViewController:self]; currentViewController=thirdViewController; //切换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前不会调用[self willMoveToParentViewController:nil] ,所以需要显示调用 [currentViewController willMoveToParentViewController:nil]; [currentViewController removeFromSuperview]; [currentViewController removeFromParentViewController];
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