ios - 从 AFNetworking 下载设置 TableView 单元格图像

Question

我正在使用 AFNetworking 下载 rss 提要图像集到表格 View 。以下是我正在使用的代码。

- (UITableViewCell *)tableView:(UITableview *)tableView cellForItemAtIndexPath:(NSIndexPath *)indexPath;
{
    Cell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"MY_CELL" forIndexPath:indexPath];

    NSString *wallpaperLink = [af setThumbString:[[feeds objectAtIndex:indexPath.row] objectForKey: @"wallpaper"]];

    //AfNetwork Download
    AFHTTPRequestOperation *requestOperation = [[AFHTTPRequestOperation alloc] initWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:wallpaperLink]]];
    requestOperation.responseSerializer = [AFImageResponseSerializer serializer];
    [requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
       //Set Cell Image from response
       cell.imageView.image = responseObject;
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Image error: %@", error);
    }];
    [requestOperation start];

    return cell;
}

但是当我阅读一些教程时，我意识到这不是使用 AFNetworking 下载异步图像的方法。有人可以告诉我我的代码，如何下载 responseobject 并将其添加到 cell.imageView.image 吗？？？

Answer 1

我这样做是为了避免内存泄漏:

NSURL *url = [NSURL URLWithString:@"http:url..."];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
UIImage *placeholderImage = [UIImage imageNamed:@"your_placeholder"];

__weak UITableViewCell *weakCell = cell;

[cell.imageView setImageWithURLRequest:request
                      placeholderImage:placeholderImage
                               success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {

                                   weakCell.imageView.image = image;
                                   [weakCell setNeedsLayout];

                               } failure:nil];

它适用于 AFNetworking 2。

正如@Greg 在评论中建议的那样:你必须添加#import "UIImageView+AFNetworking.h".