zoukankan      html  css  js  c++  java
  • [IOS笔记]

    View Controller中可以添加多个sub view,在需要的时候显示出来;

    可以通过viewController(parent)中可以添加多个child viewController;来控制页面中的sub view,降低代码耦合度;

    通过切换,可以显示不同的view;,替代之前的addSubView的管理

       //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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  • 原文地址:https://www.cnblogs.com/zengyou/p/3386605.html
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