ios - UICollectionViewCell setAsset 无法识别的选择器

Question

我正在尝试创建一个照片库。我的 cellForItemAtIndexPath 代码如下。

  - (UICollectionViewCell *) collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    PhotoCell *cell = (PhotoCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"PhotoCell" forIndexPath:indexPath];   
    ALAsset *asset = self.assets[indexPath.row];
    cell.asset = asset; // crash on this line
    cell.backgroundColor = [UIColor redColor]; 
    return cell;
}

应用程序在 cell.asset = asset; 行崩溃并给出错误:-[UICollectionViewCell setAsset:]: unrecognized selector sent to instance 0xa226fd0。

PhotoCell.h 是这样的:

#import <UIKit/UIKit.h>
#import <AssetsLibrary/AssetsLibrary.h>

@interface PhotoCell : UICollectionViewCell
@property(nonatomic, strong) ALAsset *asset;

@end

PhotoCell.m 是:

#import "PhotoCell.h"

@interface PhotoCell ()
@property(nonatomic, weak) IBOutlet UIImageView *photoImageView;
@end

@implementation PhotoCell
- (void)setAsset:(ALAsset *)asset
{
    _asset = asset;
    self.photoImageView.image = [UIImage imageWithCGImage:[asset thumbnail]];
}

@end

我找不到应用程序崩溃的任何原因。我在哪里犯错？与 Storyboard 内容有关吗？

Answer 1

你应该用你的 UICollectionView 注册你的单元格类

[self.collectionView registerClass:[PhotoCell class] forCellWithReuseIdentifier:@"PhotoCell"];