Question

当我使用AFNetworking 2时，我可以像AFMTPRequestOperation一样取得进展：

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del.sh: line 4: [[263_V01_C00_R079_TEx_BL_4096H.ats: command not found
del.sh: line 4: [[263_V01_C01_R000_TEy_BL_4096H.ats: command not found
del.sh: line 4: [[263_V01_C01_R079_TEy_BL_4096H.ats: command not found
del.sh: line 4: [[263_V01_C02_R000_THx_BL_4096H.ats: command not found
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del.sh: line 4: [[263_V01_C03_R000_THy_BL_4096H.ats: command not found
del.sh: line 4: [[263_V01_C03_R079_THy_BL_4096H.ats: command not found

我使用NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:aURL cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:_timeoutInterval]; AFHTTPRequestOperation *imageRequestOperation = [[AFHTTPRequestOperation alloc] initWithRequest:urlRequest]; imageRequestOperation.responseSerializer = [AFImageResponseSerializer serializer]; __weak AFHTTPRequestOperation *imageRequestOperationForBlock = imageRequestOperation; [imageRequestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { // ... } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // ... }]; [imageRequestOperation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) { if (progress) { progress((float)totalBytesRead / totalBytesExpectedToRead); } }];来获取数据，但我不知道如何在AFNetworking 3.0中获得下载进度。

Answer 1

评论中的链接是误导性的（NSURLSessionDownloadTask）。对不起。

下面的代码应该可以使用。

假设：此代码放在AFHTTPSessionManager子类中，声明了NSURLSessionDataTask *testTask ivar。它应该很容易根据需要进行修改。

从this answer

获取的代码的重要部分

- (void)test
{
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://eoimages.gsfc.nasa.gov/images/imagerecords/78000/78797/nwpassage_tmo_2012199_lrg.jpg"]];

    testTask = [self dataTaskWithRequest:request
                       completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {

                           if (error)
                           {
                               //...
                               NSLog(@"error");
                           }
                           else
                           {
                               //...

                               UIImage *result = responseObject;

                               NSLog(@"Success: %@",NSStringFromCGSize(result.size));
                           }
                       }];

    [self setDataTaskDidReceiveDataBlock:^(NSURLSession *session,
                                                      NSURLSessionDataTask *dataTask,
                                                      NSData *data)
     {
         if (dataTask.countOfBytesExpectedToReceive == NSURLSessionTransferSizeUnknown)
           return;

         if (dataTask != testTask)
           return;

         NSUInteger code = [(NSHTTPURLResponse *)dataTask.response statusCode];

         if (!(code> 199 && code < 400))
           return;

         long long  bytesReceived = [dataTask countOfBytesReceived];
         long long  bytesTotal = [dataTask countOfBytesExpectedToReceive];

         NSLog(@"... %lld/%lld",
               bytesReceived,
               bytesTotal);
     }];

    [testTask resume];
}

如何使用AFNetworking 3.0中的AFHTTPSessionManager获取下载进度

1 个答案: