ios – UICollectionView全屏放大UICollectionViewCell

概述如何放大UICollectionViewCell以便全屏显示？我已经扩展了UICollectionViewFlowLayout并在我的视图控制器中点击了一个单元格,我这样做： CGPoint pointInCollectionView = [gesture locationInView:self.collectionView];NSIndexPath *selectedIndexPath = [ 如何放大UICollectionVIEwCell以便全屏显示？我已经扩展了UICollectionVIEwFlowLayout并在我的视图控制器中点击了一个单元格,我这样做：

CGPoint pointInCollectionVIEw = [gesture locationInVIEw:self.collectionVIEw];NSIndexPath *selectedindexPath = [self.collectionVIEw indexPathForItemAtPoint:pointInCollectionVIEw];UICollectionVIEwCell *selectedCell = [self.collectionVIEw cellForItemAtIndexPath:selectedindexPath];NSLog(@"Selected cell %@",selectedindexPath);

不确定从哪里开始. UICollectionVIEw应该负责显示放大的单元格吗？或者我应该创建一个新的视图控制器,以全屏显示单元格(图像)的内容？

解决方法 我采用了解决方案 here并稍微修改了它以使用集合视图.我还添加了一个透明的灰色背景来隐藏原始视图(假设图像不占用整个帧).

@implementation CollectionVIEwController{    UIImageVIEw *fullScreenImageVIEw;    UIImageVIEw *originalimageVIEw;}...// in whatever method you're using to detect the cell selectionCGPoint pointInCollectionVIEw = [gesture locationInVIEw:self.collectionVIEw];NSIndexPath *selectedindexPath = [self.collectionVIEw indexPathForItemAtPoint:pointInCollectionVIEw];UICollectionVIEwCell *selectedCell = [self.collectionVIEw cellForItemAtIndexPath:selectedindexPath];originalimageVIEw = [selectedCell imageVIEw]; // or whatever cell element holds your image that you want to zoomfullScreenImageVIEw = [[UIImageVIEw alloc] init];[fullScreenImageVIEw setContentMode:UIVIEwContentModeScaleAspectFit];fullScreenImageVIEw.image = [originalimageVIEw image];// ***********************************************************************************// You can either use this to zoom in from the center of your cellCGRect tempPoint = CGRectMake(originalimageVIEw.center.x,originalimageVIEw.center.y,0);// OR,if you want to zoom from the tapped point...CGRect tempPoint = CGRectMake(pointInCollectionVIEw.x,pointInCollectionVIEw.y,0);// ***********************************************************************************CGRect startingPoint = [self.vIEw convertRect:tempPoint fromVIEw:[self.collectionVIEw cellForItemAtIndexPath:selectedindexPath]];[fullScreenImageVIEw setFrame:startingPoint];[fullScreenImageVIEw setBackgroundcolor:[[UIcolor lightGraycolor] colorWithAlphaComponent:0.9f]];[self.vIEw addSubvIEw:fullScreenImageVIEw];[UIVIEw animateWithDuration:0.4                 animations:^{                     [fullScreenImageVIEw setFrame:CGRectMake(0,self.vIEw.bounds.size.wIDth,self.vIEw.bounds.size.height)];                 }];UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(fullScreenImageVIEwTapped:)];singleTap.numberOfTapsrequired = 1;singleTap.numberOftouchesrequired = 1;[fullScreenImageVIEw addGestureRecognizer:singleTap];[fullScreenImageVIEw setUserInteractionEnabled:YES];...- (voID)fullScreenImageVIEwTapped:(UIGestureRecognizer *)gestureRecognizer {    CGRect point=[self.vIEw convertRect:originalimageVIEw.bounds fromVIEw:originalimageVIEw];    gestureRecognizer.vIEw.backgroundcolor=[UIcolor clearcolor];    [UIVIEw animateWithDuration:0.5                     animations:^{                         [(UIImageVIEw *)gestureRecognizer.vIEw setFrame:point];                     }];    [self performSelector:@selector(animationDone:) withObject:[gestureRecognizer vIEw] afterDelay:0.4];}-(voID)animationDone:(UIVIEw  *)vIEw{    [fullScreenImageVIEw removeFromSupervIEw];    fullScreenImageVIEw = nil;}

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