AFHTTPRequestOperationManager的底層使用了NSOperation，并且使用的是NSURLConnection，可支持iOS6及更新的系統(tǒng)版本；AFURLSessionManager使用的是更新的NSURLSession，支持iOS7.0以上系統(tǒng)。本人強(qiáng)烈建議使用AFURLSessionManager除非你要使用operations或者需要支持iOS6。3.0的AFNetowrking使用AFHttpSessionManager代替AFHTTPRequestOperationManager，請注意！

下面來寫一下AFURLSessionManager的上傳圖片方法：

//上傳圖片
- (void)requestUploadPhotoWithImage:(UIImage *)image withSucess:(HLSucessBlock)success failure:(HLFailureBlock)failure
{
    NSData *imagedata = UIImageJPEGRepresentation(image, 0.7f);
     
    NSString *urlString = [NSString stringWithFormat:@"%@%@",HLNETWORK_BASE_URL_TEST,kUrl_UploadImages];
    urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    NSString *token = [HLFitmentManager instance].userInfo.token;
    if (CHECK_VALID_STRING(token)) {
        [params setObject:token forKey:@"token"];
    }

    NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer]multipartFormRequestWithMethod:@"POST" URLString:urlString parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        formatter.dateFormat = @"yyyyMMddHHmmss";
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.jpg",str];
        [formData appendPartWithFileData:imagedata name:@"image" fileName:fileName mimeType:@"image/jpeg"];
    } error:nil];
    
    AFURLSessionManager *manager = [[AFURLSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    
    NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:^(NSProgress * _Nonnull uploadProgress) {
        //進(jìn)度
    } completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
        HLParser *parser = [[HLParser alloc] init];
        BOOL isError = [parser hasErrorWithDict:responseObject];
        if (isError) {
            //上傳圖片失敗
            NSLog(@"上傳圖片失敗");
            failure(nil,parser.error);
        }else {
            NSLog(@"上傳圖片成功");
            success(nil,responseObject);
        }
    }];
    [uploadTask resume];
}

本文Demo地址:https://github.com/JinqianChina/uploadImage