如何使用UIViewControllerAnimatedTransitioning与UINavigationController？

问题描述

当将视图控制器推送到 UINavigationController 时，如何获得自定义转换（iOS7）？我尝试在 UINavigationController 中设置 TransitioningDelegate ，也在控制器上设置
方法

解决方案

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@rounak有正确的想法，但有时它有助于准备代码，而无需从github下载。

这里是我采取的步骤：

1. 使您的FromViewController.m符合 UINavigationControllerDelegate 。其他的示例代码告诉你符合 UIViewControllerTransitioningDelegate ，但这只有当你 ToViewController。

   
   
   

   @interface ViewController：UIViewController




2. 在FromViewController中的委托回调方法中返回自定义过渡动画对象：

      - （id< UIViewControllerAnimatedTransitioning>）navigationController：（UINavigationController *）navigationController 
    animationControllerForOperation：（UINavigationControllerOperation）operation 
    fromViewController： （UIViewController *）fromVC 
    toViewController：（UIViewController *）toVC {
    TransitionAnimator * animator = [TransitionAnimator new]; 
    animator.presenting =（operation == UINavigationControllerOperationPush）; 
    return animator; 
   } 
     




3. 创建自定义animator类并粘贴这些示例方法： p>
   
   

      - （NSTimeInterval）transitionDuration：（id< UIViewControllerContextTransitioning>）transitionContext {
    return 0.5f; 
   } 
    
     - （void）animateTransition：（id< UIViewControllerContextTransitioning>）transitionContext {
    //从上下文中获取from和to控制器
    UIViewController * fromViewController = [transitionContext viewControllerForKey：UITransitionContextFromViewControllerKey]; 
    UIViewController * toViewController = [transitionContext viewControllerForKey：UITransitionContextToViewControllerKey]; 
    
    //设置我们的结束帧。如果我们要
   ，我们将修改它。CGRect endFrame = CGRectMake（80，280，160，100）; 
    
    if（self.presenting）{
    fromViewController.view.userInteractionEnabled = NO; 
    
    [transitionContext.containerView addSubview：fromViewController.view]; 
    [transitionContext.containerView addSubview：toViewController.view]; 
    
    CGRect startFrame = endFrame; 
    startFrame.origin.x + = 320; 
    
    toViewController.view.frame = startFrame; 
    
    [UIView animateWithDuration：[self transitionDuration：transitionContext] animations：^ {
    fromViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeDimmed; 
    toViewController.view.frame = endFrame; 
   } completion：^（BOOL finished）{
    [transitionContext completeTransition：YES]; 
   }]; 
   } 
    else {
    toViewController.view.userInteractionEnabled = YES; 
    
    [transitionContext.containerView addSubview：toViewController.view]; 
    [transitionContext.containerView addSubview：fromViewController.view]; 
    
    endFrame.origin.x + = 320; 
    
    [UIView animateWithDuration：[self transitionDuration：transitionContext] animations：^ {
    toViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeAutomatic; 
    fromViewController.view.frame = endFrame; 
   } completion：^（BOOL finished）{
    [transitionContext completeTransition：YES]; 
   }]; 
   } 
   } 
     

本质上，动画师是做重的东西的对象。当然，你可以让你的UINavigationControllerDelegate是一个单独的对象，但这取决于你的架构师你的应用程序。

How can I get custom transitions (iOS7) when pushing a view controller onto UINavigationController? I tried setting the TransitioningDelegate both in the UINavigationController and also on the controller I'm pushingThe methods never get called.

All examples I find use custom transitions when presenting modally.

解决方案

@rounak has the right idea, but sometimes it helps to have code ready without having to download from github.

Here are the steps that I took:

1. Make your FromViewController.m conform to UINavigationControllerDelegate. Other sample code out there tells you to conform to UIViewControllerTransitioningDelegate, but that's only if you're presenting the ToViewController.

   @interface ViewController : UIViewController

2. Return your custom transition animator object in the delegate callback method in FromViewController:

   - (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController
                                  animationControllerForOperation:(UINavigationControllerOperation)operation
                                               fromViewController:(UIViewController *)fromVC
                                                 toViewController:(UIViewController *)toVC {
       TransitionAnimator *animator = [TransitionAnimator new];
       animator.presenting = (operation == UINavigationControllerOperationPush);
       return animator;
   }
   

3. Create your custom animator class and paste these sample methods:

   - (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
       return 0.5f;
       }
   
   - (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext     {
   // Grab the from and to view controllers from the context
   UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
   UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
   
   // Set our ending frame. We'll modify this later if we have to
   CGRect endFrame = CGRectMake(80, 280, 160, 100);
   
   if (self.presenting) {
       fromViewController.view.userInteractionEnabled = NO;
   
       [transitionContext.containerView addSubview:fromViewController.view];
       [transitionContext.containerView addSubview:toViewController.view];
   
       CGRect startFrame = endFrame;
       startFrame.origin.x += 320;
   
       toViewController.view.frame = startFrame;
   
       [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
           fromViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeDimmed;
           toViewController.view.frame = endFrame;
       } completion:^(BOOL finished) {
           [transitionContext completeTransition:YES];
       }];
   }
   else {
       toViewController.view.userInteractionEnabled = YES;
   
       [transitionContext.containerView addSubview:toViewController.view];
       [transitionContext.containerView addSubview:fromViewController.view];
   
       endFrame.origin.x += 320;
   
       [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
           toViewController.view.tintAdjustmentMode = UIViewTintAdjustmentModeAutomatic;
           fromViewController.view.frame = endFrame;
       } completion:^(BOOL finished) {
           [transitionContext completeTransition:YES];
       }];
   }
   }
   

Essentially, the animator is the object doing the heavy lifting. Of course, you can make your UINavigationControllerDelegate be a separate object, but that depends on how your architect your app.

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