我在
animating changes in a collection view读苹果
guidelines,试图模仿照片应用程序.选择图像时,图像会从其位于集合视图中的区域“增长”到全尺寸视图.
Apple注意到使用UICollectionViewLayout对象但对我来说它看起来非常混乱,并且全尺寸图库中的最终图像不可见,因为动画集中在集合视图上.
我的代码如下
- -(void)setHorizontalLayout:(BOOL)layout
- {
- if (layout == YES)
- {
- UICollectionViewTransitionLayout *layout =[self.collectionView startInteractiveTransitionToCollectionViewLayout:[self getHorizontalPagingLayout] completion:^(BOOL completed,BOOL finish) {
- [self.collectionView setPagingEnabled:YES];
- }];
- [self.collectionView.collectionViewLayout invalidateLayout];
- layout.transitionProgress = 0.1;
- double delayInSeconds = 0.1;
- dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW,(int64_t)(delayInSeconds * NSEC_PER_SEC));
- dispatch_after(popTime,dispatch_get_main_queue(),^(void){
- [self updateLayout:layout];
- //[self.collectionView.collectionViewLayout invalidateLayout];
- //[self.collectionView finishInteractiveTransition];
- });
- [self.collectionView.collectionViewLayout invalidateLayout];
- return;
- }
- }
- -(void)updateLayout:(UICollectionViewTransitionLayout *)layout
- {
- if (layout.transitionProgress >= 1.0)
- {
- [self.collectionView finishInteractiveTransition];
- return;
- }
- double delayInSeconds = 0.05;
- dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW,(int64_t)(delayInSeconds * NSEC_PER_SEC));
- dispatch_after(popTime,^(void){
- layout.transitionProgress += 0.005;
- [self.collectionView.collectionViewLayout invalidateLayout];
- [self updateLayout:layout];
- });
- }
解决方法
如何使用自定义转换呈现带有UIImageView的UIViewController？本教程帮助了我.
http://www.teehanlax.com/blog/custom-uiviewcontroller-transitions/
