ZOZolaZoomTransition 是一个缩放过渡动画，它将整个视图层次结构动画化。它在 Zola iOS 应用程序 中得到了广泛的应用。

它的样子是这样的

示例

ZOZolaZoomTransition 包含一个功能齐全的演示项目。以下是基本实现步骤。假设一个典型的“主-详细”场景，其中“主”控制器包含一个 UICollectionView，当点击一个单元格时，“详细”控制器被推入堆栈。过渡动画将从所选单元格的 imageView 到 detailController 的 imageView 播放。

1. 实现这个 UINavigationControllerDelegate 方法，并返回一个 ZOZolaZoomTransition 实例

   - (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController     
                                      animationControllerForOperation:(UINavigationControllerOperation)operation 
                                                   fromViewController:(UIViewController *)fromVC 
                                                     toViewController:(UIViewController *)toVC {
   
       // Determine if we're presenting or dismissing
       ZOTransitionType type = (fromVC == self) ? ZOTransitionTypePresenting : ZOTransitionTypeDismissing;
   
       // Create a transition instance with the selected cell's imageView as the target view
       ZOZolaZoomTransition *zoomTransition = [ZOZolaZoomTransition transitionFromView:_selectedCell.imageView
                                                                                  type:type
                                                                              duration:0.5
                                                                              delegate:self];
   
       return zoomTransition;
   }

2. 实现两个必需的 ZOZolaZoomTransitionDelegate 方法，为目标的视图提供起始和结束帧（请参阅 ZOZolaZolaZoomTransition.h 以获得详细的文档）。必须相对于提供的 relativeView 返回帧

   - (CGRect)zolaZoomTransition:(ZOZolaZoomTransition *)zoomTransition
           startingFrameForView:(UIView *)targetView
                 relativeToView:(UIView *)relativeView
             fromViewController:(UIViewController *)fromViewController
               toViewController:(UIViewController *)toViewController {
   
       if (fromViewController == self) {
           // We're pushing to the detail controller. The starting frame is taken from the selected cell's imageView.
           return [_selectedCell.imageView convertRect:_selectedCell.imageView.bounds toView:relativeView];
       } else if ([fromViewController isKindOfClass:[ZODetailViewController class]]) {
           // We're popping back to this master controller. The starting frame is taken from the detailController's imageView.
           ZODetailViewController *detailController = (ZODetailViewController *)fromViewController;
           return [detailController.imageView convertRect:detailController.imageView.bounds toView:relativeView];
       }
   
      return CGRectZero;
   }
   
   - (CGRect)zolaZoomTransition:(ZOZolaZoomTransition *)zoomTransition
          finishingFrameForView:(UIView *)targetView
                 relativeToView:(UIView *)relativeView
             fromViewController:(UIViewController *)fromViewComtroller
               toViewController:(UIViewController *)toViewController {
   
       if (fromViewComtroller == self) {
           // We're pushing to the detail controller. The finishing frame is taken from the detailController's imageView.
           ZODetailViewController *detailController = (ZODetailViewController *)toViewController;
           return [detailController.imageView convertRect:detailController.imageView.bounds toView:relativeView];
       } else if ([fromViewComtroller isKindOfClass:[ZODetailViewController class]]) {
           // We're popping back to this master controller. The finishing frame is taken from the selected cell's imageView.
           return [_selectedCell.imageView convertRect:_selectedCell.imageView.bounds toView:relativeView];
       }
   
       return CGRectZero;
   }

补充视图

ZOZolaZoomTransition 支持 optional 数组中的补充视图，这些视图将在动画的其他视图之上绘制和动画化。补充视图的两个常见用例是：

1. 绘制位于目标视图之上，但不是其子视图的视图。
2. 绘制当过渡开始时被屏幕边缘剪切的视图。因此，在动画过程中看起来被截断。

以下是一个示例。以下单元格行在用户点击最左边的单元格时被屏幕底部剪裁。以下是过渡过程中的两个截图：

没有补充视图

带有补充视图：（“组礼品”横幅和右侧的两个单元格已添加为补充视图，因此它们位于动画之上）

应用扩展

ZOZolaZoomTransition 使用了 UIApplication 的 beginIgnoringInteractionEvents 和 endIgnoringInteractionEvents 方法，这些方法在应用扩展内部不可用。要在扩展中使用 ZOZolaZoomTransition，在扩展目标的构建设置中定义以下预处理器宏：ZO_APP_EXTENSIONS=1

设置说明

使用CocoaPods安装，请将以下内容添加到您的Podfile中：

platform :ios, '7.0'
pod 'ZOZolaZoomTransition', '~> 1.0.0'

或手动添加ZOZolaZoomTransition.h和ZOZolaZoomTransition.m到您的项目中。

限制

• ZOZolaZoomTransition目前仅适用于UINavigationController过渡。我们还需要添加对模态过渡的支持，理想状态下不应该改变API。欢迎提交pull请求！

要求

ZOZolaZoomTransition需要iOS 7.0或更高版本。

许可证

ZOZolaZoomTransition在MIT许可证下可用。详见LICENSE文件以获取更多信息。