ios - 将图像添加到 UICollectionViewCell 时应用程序崩溃

Question

我需要在 UICollectionViewCell 上添加图像和文本。所以我用了这段代码

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *cellIdentifier = @"cvCell";
CVCell *cell = (CVCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];
     NSString *cellData = [firstSection objectAtIndex:indexPath.row];
    [cell.titleLabel setText:cellData];

    NSString *imageName = [second objectAtIndex:indexPath.row];

    NSLog(@"CV setting image for row %ld from file in bundle with name '%@'", (long)indexPath.row, imageName);

    cell.myImageView.image = [UIImage imageNamed:imageName];

    return cell;

}

FirstSection 数组有一些名称，Second 数组有图像。显示文本但图像不工作。

所以请告诉我我的代码有什么问题。

我遇到这样的错误:

2014-11-07 15:18:56.928 CollectionViewExample[4459:151457] CV setting image for row 0 from file in bundle with name '(
    "real_estate_2.png",
    "photography_2.png",
    "auto_2.png",
    "electronics_2.png",
    "services_2.png"
)'
2014-11-07 15:18:56.929 CollectionViewExample[4459:151457] -[__NSArrayI length]: unrecognized selector sent to instance 0x7be86240

2014-11-07 15:18:57.044 CollectionViewExample[4459:151457] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI length]: unrecognized selector sent to instance 0x7be86240'
*** First throw call stack:
(
    0   CoreFoundation                      0x02bf5df6 __exceptionPreprocess + 182
    1   libobjc.A.dylib                     0x01975a97 objc_exception_throw + 44
    2   CoreFoundation                      0x02bfda75 -[NSObject(NSObject) doesNotRecognizeSelector:] + 277
    3   CoreFoundation                      0x02b469c7 ___forwarding___ + 1047
    4   CoreFoundation                      0x02b4658e _CF_forwarding_prep_0 + 14
    5   UIKit                               0x008ad0be +[_UIAssetManager createAssetNamed:fromBundle:] + 66
    6    

Answer 1

我在UICollectionView中最常犯的错误就是没有写

[self.myCollectionView registerClass:[MyCollectionViewCell class] forCellWithReuseIdentifier:@"MYCELL"];

您是否尝试过在 imageView 中提供静态图像？如果它有效，那么我认为您的数组中的 UIImage 可能需要类型转换

点击此链接:http://www.techotopia.com/index.php/An_Overview_of_iOS_6_Collection_View_and_Flow_Layout