UIImageView + Afnetworking无法正常工作

Question

我已经从here复制了文件的内容并创建了一个UIImageView + AFNetworking.h并导入了我的实现文件

现在，当我编写以下代码时，我收到此错误，但是当我删除代码块时，一切正常。

我想在自定义表格单元格中显示图像。我正在通过JSON抓取图像的网址

NSURLRequest *imageRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:[dictArray objectForKey:@"image"]]];
[cell.thumbnailImageView setImageWithURLRequest:imageRequest placeholderImage:nil
                               success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image){
                                   NSLog(@"success");
                                   cell.thumbnailImageView.image = image;
                                   cell.thumbnailImageView.contentMode = UIViewContentModeScaleAspectFit;
                                   cell.thumbnailImageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
                                   [cell setNeedsLayout];// To update the cell {if not using this, your image is not showing over cell.}
                               }failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error){
                                   NSLog(@"Failure");}];

以下是错误的屏幕截图

加载后崩溃

Answer 1

而不是使用afnetworking你可以使用调度方法

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^{
      NSString *url = [indexDic objectForKey:@"image"];
    NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
    UIImage *image = [UIImage imageWithData:imageData];
    dispatch_async(dispatch_get_main_queue(), ^{

        cellImg.image = image;

    });
});

return cell;

 }