Question

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

-(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，第二个数组有图像。显示文字但图像无效。

所以请告诉我我的代码中有什么不对。

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

我经常在UICollectionView中做的最常见的错误是由于没有写

[self.myCollectionView registerClass：[MyCollectionViewCell class] forCellWithReuseIdentifier：@ “了myCell”];

您是否尝试过在imageView中提供静态图片？如果它工作，那么我假设您的阵列中的UIImage可能需要进行类型转换

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

Answer 2

错误是你的新版本collectionViewCell或更早版本imageView现在没有名为（myImageOnCollectionView之前）或collectionCell的属性。这是因为您的集合视图不响应选择器。（选择器与方法相同）。如果您的实现文件（.h）中有自定义@property (nonatomic, strong) UIImageView *theNameYouWant; // The must be the same you implement en cellForRow...（简单方法），请添加以下内容：

IBOutlet

//使用故事板表示连接此属性。（确保在storyBoard中，单元格必须是您自己的单元格类。）

连接时出现@property (nonatomic, strong) IBOutlet UIImageView *theNameYouWant;;

{{1}}

//如果你有全部代码，请告诉我。

Answer 3

对不起，答案很简单，但看起来像是

imageName它的NSArray不是NSString

cell.myImageView.image = [UIImage imageNamed:<NSArray>];

请NSLog（@＆＃34;％@＆＃34;，第二名）;

将图像添加到UICollectionViewCell时应用程序崩溃

3 个答案: