UICollectionView didSelectRowAtIndexPath不起作用

didSelectRowAtIndexPath方法在我的应用程序中不起作用。 我没有使用NSLog打印任何输出：

 - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { PhotoCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath]; PFObject *imageObject = [self.imageFilesArray objectAtIndex:indexPath.row]; PFFile *imageFile = [imageObject objectForKey:@"file"]; [imageFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) { if (!error) { cell.imageView.image = [UIImage imageWithData:data]; } }]; return cell; } - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { PhotoCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath]; NSLog(@"didSelectRowAtIndexPath"); cell.imageView.image = self.image; return cell; } 

我希望当我点击一个单元格时，选择图像，然后将图像赋予self.image 。

我们能用segue做到吗？ 因为我的didSelectRowAtIndexPath方法根本不起作用。

 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"showPhotoDetail"]) { NSLog(@"SEGUE showPhotoDetail"); UICollectionViewCell *cell = sender; NSIndexPath *indexPath = [self.collectionView indexPathForCell:cell]; PhotoDetailViewController *photoDetailViewController = (PhotoDetailViewController *)segue.destinationViewController; photoDetailViewController.truckImage = self.image; //[UIImage imageNamed:[self.imageFilesArray objectAtIndex:indexPath.row] ]; NSLog(@"%@", photoDetailViewController.truckImage); } } 

Answer 1

选择Item的方法签名是错误的，正确的方法签名就是这个

 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 

更多信息在这里

编辑

尝试此代码以获取所选图像。

 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath { PhotoCell *cell = [collectionView cellForItemAtIndexPath:indexPath]; self.image = cell.imageView.image; } 

编辑2

 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"showPhotoDetail"]) { // get index path of selected cell NSIndexPath *indexPath = [collectionView.indexPathsForSelectedItems objectAtIndex:0]; // get the cell object PhotoCell *cell = [collectionView cellForItemAtIndexPath:indexPath]; // get image from selected cell self.image = cell.imageView.image; } }