AFNetworking setImageWithURLRequest下载进度 [英] AFNetworking setImageWithURLRequest download progress

问题描述

我正在使用此代码将图像设置为UIImageView。

I am using this code to set image to UIImageView.

NSURLRequest *URLRequest = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:imageToLoad]];

    [imageView setImageWithURLRequest:URLRequest placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
        [cell.image setImage:image];
        [cell.activityIndicator stopAnimating];

    } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
        // Nothing
    }];

但我想跟踪该方法的下载进度，是否可以在setImageWithURLRequest方法中执行此操作？

But I want to track download progress with that method, is it possbile to do it in setImageWithURLRequest method?

通常我这样做是为了显示加载进度百分比：

Normally I do this to show loading progress percentage:

[SVProgressHUD showWithStatus:@"Start download..."];
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:link]];
    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        // success
        [SVProgressHUD showSuccessWithStatus:@"Done."];

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        // failed
        [SVProgressHUD showErrorWithStatus:@"Failed."];
    }];

    [operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
        [SVProgressHUD showWithStatus:[NSString stringWithFormat:@"Downloading... %0.0f%%", totalBytesRead*100*1.0/(totalBytesRead+totalBytesExpectedToRead)]];
    }];

推荐答案

开箱即用，没有UIImageView + AFNetworking类别没有没有这个功能。但是，可以通过将此方法添加到类别中来轻松添加：

Out of the box, no UIImageView+AFNetworking category doesn't have this functionality. However, it can easily be added to by adding this method to the category:

-(void)setDownloadProgressBlock:(void (^)(NSUInteger bytesRead, long long totalBytesRead,   long long totalBytesExpectedToRead))block{
   [self.af_imageRequestOperation setDownloadProgressBlock:block];
}

这篇关于AFNetworking setImageWithURLRequest下载进度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！