collectionView didSelectItemAtIndexPath

Question

在collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath方法中，我试图将音频文件数组加载到集合视图单元格中，但基于indexPath行，它跳过了索引0处的单元格和索引1处的单元格，当单元格被选中时，它正在播放音频文件。我不明白为什么。

以下是我的代码

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
audioArray =[[NSArray alloc] initWithObjects:@"0", @"1", @"2", @"3", nil];

NSString *filePath = [audioArray objectAtIndex:indexPath.row];

NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:filePath ofType: @"mp3"];

NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: audioFilePath];

audioPlayer = [[AVAudioPlayer alloc]
               initWithContentsOfURL:fileURL error:nil];

}

如果有人能给我指出正确的方向。我会很感激的。

谢谢你的帮助。

Answer 1

终于修好了

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

if ([[segue identifier] isEqualToString:@"showDetail"])
{
    NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] objectAtIndex:0];

    // load the image, prevent it from being cached using 'initWithContentsOfFile'

    NSString *imageNameToLoad = [NSString stringWithFormat:@"%d_full", selectedIndexPath.item];

    NSString *pathToImage = [[NSBundle mainBundle] pathForResource:imageNameToLoad ofType:@"jpg"];

    UIImage *image = [[UIImage alloc] initWithContentsOfFile:pathToImage];


    NSString *audioToLoad = [NSString stringWithFormat:@"%d", selectedIndexPath.item];


    NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:audioToLoad ofType: @"mp3"];

    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: audioFilePath];

    audioPlayer = [[AVAudioPlayer alloc]
                   initWithContentsOfURL:fileURL error:nil];

    DetailViewController *detailViewController = [segue destinationViewController];

    detailViewController.image = image;

    detailViewController.audioPlayer = audioPlayer;

               }        
            }

这可能会对某些人有所帮助。