Ios 使用多部分/表单数据目标C上载图像

我是新的iOS开发者。我想上传带有多部分/表单数据的图像，这是我的obj C代码，我是从邮递员那里得到的。图为API的请求参数。我在邮递员测试它工作正常，但我在移动测试它不工作，并得到HTTP 500错误，请为我检查它。谢谢大家

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您可以使用第三方类。 参考：

NSMutableURLRequest*请求=[[AFHTTPRequestSerializer]multipartFormRequestWithMethod:@“POST”URLString:@”http://example.com/upload“参数：nil constructingBodyWithBlock:^（id formData）{
[formData appendPartWithFileURL:[NSURL fileURLWithPath:@]file://path/to/image.jpg“]name:@“file”fileName:@“fileName.jpg”mimeType:@“image/jpeg”错误：nil]；
}错误：无]；
AFURLSessionManager*manager=[[AFURLSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]]；
NSURLSessionUploadTask*上传任务；
uploadTask=[manager]
uploadTaskWithStreamedRequest:请求
进度：^（NSProgress*_非空上传进度）{
//这不会在主队列上回调。
//您负责将UI更新发送到主队列
dispatch\u async（dispatch\u get\u main\u queue（）^{
//更新进度视图
[progressView setProgress:uploadProgress.fractionCompleted]；
});
}
completionHandler:^（NSURLResponse*\u非空响应，id\u可空响应对象，NSError*\u可空错误）{
如果（错误）{
NSLog（@“错误：%@”，错误）；
}否则{
NSLog（@“%@%@”，响应，响应对象）；
}
}];
[上传任务恢复]；

500是内部服务器错误，您应该检查服务器日志。我不是在使用服务器，我只是收到API并使用它。谢谢，我使用了AFNetworking类，但它仍然不工作。这是我的代码：（。

strURL = [NSString stringWithFormat:@"%@%@",URL,strURL];
NSArray *parameters = @[ @{ @"name": @"imageInfo", @"value": @"{\"user\":{\"userId\":\"165\"},\"description\":\"test description\",\"competitionId\":\"1\",\"speciesId\":\"13\",\"lng\":\"107.9296875\",\"lat\":\"15.83453574122155\",\"locationName\":\"Đại Lãnh, Đại Lộc, Quảng Nam, Vietnam\",\"originalImageName\":\"\"}" },
                     @{ @"name": @"filenames", @"value": @"{}" },
                     @{ @"name": @"files", @"fileName": (UIImageJPEGRepresentation(uploadImage, 0.1)) } ];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:strURL] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10.0];
NSString *boundary = @"---011000010111000001101001";
NSDictionary *headers = @{ @"content-type": @"multipart/form-data; boundary=---011000010111000001101001",
                           @"cache-control": @"no-cache",
                           @"postman-token": @"463bcf06-08f6-7611-c1fb-13b0dde79c5c"};

NSError *error;
NSMutableString *body = [NSMutableString string];
for (NSDictionary *param in parameters) {
    [body appendFormat:@"\r\n--%@\r\n", boundary];
    if (param[@"fileName"]) {
        [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"; filename=\"%@\"\r\n", param[@"name"], @"yourimage.jpg"];
        [body appendFormat:@"Content-Type: image/jpeg\r\n\r\n"];
        [body appendFormat:@"%@", param[@"fileName"]];
        if (error) {
            NSLog(@"%@", error);
        }
    } else {
        [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"\r\n\r\n", param[@"name"]];
        [body appendFormat:@"%@", param[@"value"]];
    }
}
[body appendFormat:@"\r\n--%@--\r\n", boundary];
NSData *postData = [body dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPMethod:@"POST"];
[request setAllHTTPHeaderFields:headers];
[request setHTTPBody:postData];
NSURLResponse *response;

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                            completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                if (error) {
                                                    NSLog(@"%@", error);
                                                } else {
                                                    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
                                                    NSLog(@"%@", httpResponse);
                                                }
                                            }];
[dataTask resume];

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
    } error:nil];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
              uploadTaskWithStreamedRequest:request
              progress:^(NSProgress * _Nonnull uploadProgress) {
                  // This is not called back on the main queue.
                  // You are responsible for dispatching to the main queue for UI updates
                  dispatch_async(dispatch_get_main_queue(), ^{
                      //Update the progress view
                      [progressView setProgress:uploadProgress.fractionCompleted];
                  });
              }
              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
                  if (error) {
                      NSLog(@"Error: %@", error);
                  } else {
                      NSLog(@"%@ %@", response, responseObject);
                  }
              }];

[uploadTask resume];