动画效果：snapshotViewAfterScreenUpdates的使用

/**
 *  @brief 返回对应view的snapshot
 *
 *  @param inputView 输入的view
 *
 *  @return 返回的snapshot
 */
- (UIView *)customSnapshotFromView:(UIView *)inputView {
    UIView *snapshot = [inputView snapshotViewAfterScreenUpdates:YES];
    snapshot.layer.masksToBounds = YES;
    snapshot.layer.cornerRadius = 0.0;
    snapshot.layer.shadowOffset = CGSizeMake(-5.0, 0.0);
    snapshot.layer.shadowRadius = 5.0;
    snapshot.layer.shadowOpacity = 0.4;
    return snapshot;
}```

> 关闭详情

```Objective-C

/**
 *  动画 关闭详情
 *
 *  @param sourceView      起始位置的view
 *  @param destinationView 终点位置的view
 *  @param animateFinished 动画结束的回调
 */
- (void)animateView:(UIView *)sourceView
             toView:(UIView *)destinationView
           finished:(AnimateFinished)animatedFinished
{
    /**
     *  逻辑：1. 得到两个view的snapshot, sourcesnapshot/destinationsnapshot
     *       2. 然后，设置destinationsnapshot的中心为整个view的中心，设置为透明（即不显示）
     *       3. 隐藏当前sourceView，第一个动画实现，sourceViewsnapshot大小变为destinationsnapshot的大小，然后隐藏，同时显示destinationsnapshot
     *       4. 第二个动画实现：destinationsnapshot移动回对应位置，然后隐藏
     */
    
    // 1
    UIView *sourceSnapshot = [self customSnapshotFromView:sourceView];
    UIView *destinationSnapshot = [self customSnapshotFromView:destinationView];
    
    // 2
    CGPoint viewCenter = self.view.center;
    CGPoint destinationCenter = destinationView.center;
    destinationSnapshot.center = viewCenter;
    destinationSnapshot.alpha = 1.0;
    [self.view addSubview:sourceSnapshot];
    [self.view addSubview:destinationSnapshot];
    
    // 3
    sourceView.hidden = YES;
    [UIView animateWithDuration:0.5
                     animations:^{
                         sourceSnapshot.transform = CGAffineTransformMakeScale(1.05, 1.05);
                         sourceSnapshot.alpha = 0.98;
                         sourceSnapshot.frame = destinationSnapshot.frame;
                     } completion:^(BOOL finished) {
                         
                         self.alphaView.hidden = YES;
                         destinationSnapshot.alpha = 0.98;
                         [sourceSnapshot removeFromSuperview];
                         
                         // 4
                         [UIView animateWithDuration:0.5
                                          animations:^{
                                              destinationSnapshot.center = destinationCenter;
                                              destinationSnapshot.transform = CGAffineTransformIdentity;
                                          } completion:^(BOOL finished) {
                                              [destinationSnapshot removeFromSuperview];
                                              animatedFinished();
                                          }];
                     }];
    
}```

> 查看详情

```Objective-C

/**
 *  动画 查看详情
 *
 *  @param viewToshow      要展示的view
 *  @param currentView     起始的view
 *  @param animateFinished 动画结束的回调
 */
- (void)showView:(UIView *)viewToshow
        withView:(UIView *)currentView
        finished:(Finished)animateFinished
{
    // Taking a snapshot of the selected row using helper method
    UIView *snapShot = [self customSnapshotFromView:currentView];
    
    // Add the snapshot as a subview, centered cell's center
    CGPoint viewCenter = self.view.window.center;
    CGPoint cellCenter = currentView.center;
    snapShot.center = cellCenter;
    snapShot.alpha = 0.0;
    snapShot.backgroundColor = [UIColor whiteColor];
    
    [self.view addSubview:snapShot];
    [UIView animateWithDuration:0.5 animations:^{
        snapShot.transform = CGAffineTransformMakeScale(1.05, 1.05);
        snapShot.alpha = 0.98;
    } completion:^(BOOL finished) {
        [UIView animateWithDuration:0.5 animations:^{
            snapShot.center = viewCenter;
            snapShot.transform = CGAffineTransformIdentity;
        } completion:^(BOOL finished) {
            self.alphaView.hidden = NO;
            viewToshow.hidden = NO;
            [snapShot removeFromSuperview];
            animateFinished();
        }];
    }];
}```

> Ps: 也许会好奇，为什么查看和关闭会是两个不同的部分？可以再回头查看一下分割的动画，发现过程其实是不一样的，查看详情比关闭少了一个步骤。
代码：[AnimateSnapshotView](https://github.com/mokong/AnimateSnapShotView)