自定义容器幻灯片滑出动画

Question

我有一个自定义容器，它删除了视图控制器并在滑动动画上添加了新的viewcontroller，我从某个地方获得了这个参考函数，但是在这个函数动画中首先删除当前的viewcontroller，即在完成滑动动画后删除完成后的curr viewcontoller它的幻灯片在新的viewcontroller

中

    - (void)swapCurrentControllerWith:(UIViewController*)viewController
                       eContainerTransitionType:(enum eContainerTransitionType )eContainerTransitionType
{
    float animDuration = 0.0f;
    float yTrans = 0.0f;
    CGPoint point = CGPointMake(0, 0);

    [self setupBeforeTransition];

    switch (eContainerTransitionType) {
        case E_CONTAINER_TRANSITION_NONE:

            animDuration = 0.0f;
            point = CGPointMake(0, 0);
            break;
        case E_CONTAINER_TRANSITION_LEFT:

            animDuration = 0.5f;
            point = CGPointMake(2000, 0);
            break;
        case E_CONTAINER_TRANSITION_RIGHT:

            animDuration = 0.5f;
            point = CGPointMake(-2000, 0);
            break;
        case E_CONTAINER_TRANSITION_UP:

            animDuration = 0.5f;
            point = CGPointMake(0, 2000);
            break;
        case E_CONTAINER_TRANSITION_DOWN:

            animDuration = 0.5f;
            point = CGPointMake(0, -2000);
            break;
        default:
            break;
    }


    //1. The current controller is going to be removed
    [self.currentDetailViewController willMoveToParentViewController:nil];

    //2. The new controller is a new child of the container
    [self addChildViewController:viewController];

    //3. Setup the new controller's frame depending on the animation you want to obtain
    viewController.view.frame = CGRectMake(point.x, point.y, viewController.view.frame.size.width, viewController.view.frame.size.height);

    //3b. Attach the new view to the views hierarchy
    [self.containerView addSubview:viewController.view];


    //Save the button position...we'll use it later
   // CGPoint buttonCenter = self.button.center;


    [UIView animateWithDuration:1.3

     //4. Animate the views to create a transition effect
                     animations:^{

                         //The new controller's view is going to take the position of the current controller's view
                         viewController.view.frame = self.currentDetailViewController.view.frame;

                         //The current controller's view will be moved outside the window
                         self.currentDetailViewController.view.frame = CGRectMake(-point.x,
                                                                                  -point.y,
                                                                                  self.currentDetailViewController.view.frame.size.width,
                                                                                  self.currentDetailViewController.view.frame.size.height);
                         //...and the same is for the button
                      //   self.button.center = CGPointMake(buttonCenter.x, 1000);

                     }


     //5. At the end of the animations we remove the previous view and update the hierarchy.
                     completion:^(BOOL finished) {

                         //Remove the old Detail Controller view from superview
                         [self.currentDetailViewController.view removeFromSuperview];

                         //Remove the old Detail controller from the hierarchy
                         [self.currentDetailViewController removeFromParentViewController];

                         //Set the new view controller as current
                         self.currentDetailViewController = viewController;
                         [self.currentDetailViewController didMoveToParentViewController:self];

                         [self setupAfterTransition];

                         //reset the button position
                         [UIView animateWithDuration:0.5 animations:^{
                         //    self.button.center = buttonCenter;
                         }];
                     }];

}

我希望它像UIpageviewcontroller一样同时发生，它应该一起发生curr viewcontroller的slideOut和新viewcontroller的SlideIn我将如何在这种情况下执行此操作