如何在UINavigationController中使用UIViewControllerAnimatedTransitioning？

Question

將視圖控制器推至UINavigationController時，如何獲得自定義轉換（iOS7）？我嘗試在UINavigationController和我推動的控制器上設置TransitioningDelegate 這些方法永遠不會被調用。

我發現所有例子都使用自定義轉換時模態表示。

Answer 1

@rounak有正確的想法，但有時它有助於準備好代碼而無需從github下載。

這裏是我採取的步驟：

1. 讓您FromViewController.m符合UINavigationControllerDelegate。其他示例代碼告訴您要符合UIViewControllerTransitioningDelegate，但只有當您的呈現 ToViewController時。

   @interface ViewController中：UIViewController中

2. 返回您的自定義動畫過渡對象委託回調方法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. 創建自定義動畫類和粘貼這些樣品的方法：

   - (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]; 
       }]; 
   } 
   } 
   

本質上，動畫師是做繁重的對象。當然，你可以讓你的UINavigationControllerDelegate成爲一個單獨的對象，但這取決於你的架構應用程序的方式。

Answer 2

編輯：剛纔意識到這可能不會回答你的問題。但它是一種選擇。

如果您正在使用故事板，則可以通過創建自定義細分來進行自定義轉換。 在屬性檢查器中，將segue類名稱更改爲您的自定義轉換類，例如MySegue。然後創建MySegue類並實施-(void)perform方法來執行轉換。

- (void) perform{ 
     UIViewController *source = self.sourceViewController; 
     UIViewController *destination = self.destinationViewController; 
     [UIView transitionFromView:source.view 
          toView:destination.view 
         duration:0.50f 
         options:UIViewAnimationOptionTransitionFlipFromTop 
         completion:nil]; 
} 

Answer 3

objc.io的視圖控制器轉換文章專門用於推送和彈出視圖控制器。 http://objc.io/issue-5/view-controller-transitions.html

我做這個動畫（http://i.imgur.com/1qEyMu3.gif）完全基於objc.io崗位。

總之，你必須有一個類實現UINavigationControllerDelegate和UIViewControllerAnimatedTransitioning與返回正確的動畫師和執行動畫所需的方法。

Answer 4

你可以看看我的演示項目，演示如何在UINavigationController中使用自定義轉換。看看https://github.com/Vaberer/BlurTransition。