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/
