ios将带有多个参数的图像上载到服务器

我试图上传一个带有其他变量的图像，但失败了。请告诉我我哪里做错了。我在代码顶部提供了一些变量，例如类型、副本和大小等。如果我在没有image参数的情况下将这些值发布到服务器，它会成功发布，但当我尝试上载带有该参数的图像时，它会失败。请注意代码，告诉我哪里做错了

`UIImage *img = [UIImage imageNamed:@"java_url.jpg"];
NSData *data = UIImageJPEGRepresentation(img,90);
NSString *md5Hash = [self md5:[NSString stringWithFormat:@"%@",data]];
NSMutableString *postString = [NSMutableString stringWithString:@""];
[postString appendString:[NSString stringWithFormat:@"&%@=%@",@"type", @"8x12" ]];

[postString appendString:[NSString stringWithFormat:@"&%@=%@",@"copies", @"2"]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@",@"sizing", kSizingOptionShrinkToFit]];
[postString appendString:[NSString stringWithFormat:@"&%@=%d",@"priceToUser", 5]];
  [postString appendString:[NSString stringWithFormat:@"&%@=%@", @"md5Hash",md5Hash]];

NSString *urlString = [NSString stringWithFormat:@"https://sandbox.pwinty.com/v2/Orders/%@/Photos",OrderId];
NSString *filename = @"facebook_contest_image.png";
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
[request addValue:@"72c56256-95a4-44e8-be31-b7b3a0b094b7" forHTTPHeaderField:@"X-Pwinty-MerchantId"];
[request addValue:@"3a1f6f29-d6e1-4f3f-9891-27e5d4f90009" forHTTPHeaderField:@"X-Pwinty-REST-API-Key"];
[request addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
NSMutableData *postbody = [NSMutableData data];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:data]];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", @"file",postbody]];
NSData *postData = [postString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSLog(@"%@",postData);
[request setHTTPBody:postbody];

NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString  *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"%@", returnString);`

---

对于任何服务器请求，我通常使用它最好的库尝试下面的代码， 它需要网络

- (void)upload {

    // !!! only JPG, PNG not covered! Have to cover PNG as well
    NSString *fileName = [NSString stringWithFormat:@"%ld%c%c.jpg", (long)[[NSDate date] timeIntervalSince1970], arc4random_uniform(26) + 'a', arc4random_uniform(26) + 'a'];
    // NSLog(@"FileName == %@", fileName);

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

    NSDictionary *parameters = @{@"lat": @"8.444444",
                                 @"lng": @"50.44444",
                                 @"location": @"New York",
                                 @"type": @"2",
                                 @"claim": @"NYC",
                                 @"flag": @"0"};
     // BASIC AUTH (if you need):
    manager.securityPolicy.allowInvalidCertificates = YES;
    manager.requestSerializer = [AFHTTPRequestSerializer serializer];
    [manager.requestSerializer setAuthorizationHeaderFieldWithUsername:@"foo" password:@"bar"];
    // BASIC AUTH END

    NSString *URLString = @"http://192.168.1.157/tapp/laravel/public/foobar/upload";

    /// !!! only jpg, have to cover png as well
    NSData *imageData = UIImageJPEGRepresentation(self.imageView.image, 0.5); // image size ca. 50 KB
    [manager POST:URLString parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFileData:imageData name:@"file" fileName:fileName mimeType:@"image/jpeg"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Success %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Failure %@, %@", error, operation.responseString);
    }];

    [self dismissViewControllerAnimated:NO completion:nil];
}

-（作废）上传{
//！！！仅JPG，PNG未涵盖！必须涵盖PNG
NSString*文件名=[NSString stringWithFormat:@“%ld%c%c.jpg”，（长）[[NSDate date]时间间隔1970]，arc4random_uniform（26）+“a”，arc4random_uniform（26）+“a”）；
//NSLog（@“FileName==%@”，FileName）；
AFHTTPRequestOperationManager*manager=[AFHTTPRequestOperationManager]；
NSDictionary*参数=@{@“lat”：@“8.4444”，
@“液化天然气”：“50.44444”，
@“地点”：“纽约”，
@“类型”：@“2”，
@“索赔”：@“纽约市”，
@“标志”：@“0”}；
//基本身份验证（如果需要）：
manager.securityPolicy.allowInvalidCertificates=是；
manager.requestSerializer=[AFHTTPRequestSerializer序列化程序]；
[manager.requestSerializer setAuthorizationHeaderFieldWithUsername:@“foo”密码：@“bar”]；
//基本身份验证结束
NSString*URLString=@”http://192.168.1.157/tapp/laravel/public/foobar/upload";
///！！！只有jpg，也必须涵盖png
NSData*imageData=UIImageJPEG表示（self.imageView.image，0.5）；//图像大小约为50 KB
[manager POST:URLString参数：参数constructingBodyWithBlock:^（id formData）{
[formData appendPartWithFileData:imageData名称：@“文件”文件名：文件名mimeType:@“图像/jpeg”]；
}成功：^（AFHTTPRequestOperation*操作，id响应对象）{
NSLog（@“成功%@”，响应对象）；
}失败：^（AFHTTPRequestOperation*操作，NSError*错误）{
NSLog（@“故障%@，%@”，错误，操作。响应字符串）；
}];
[自我解除视图控制器激活：未完成：无]；
}

您必须同时上传图像和其他参数吗？是的，在同一时间提交一个post请求，我做了完全相同的操作，但未成功。如果我在没有映像的情况下发布数据，则成功发布其余变量，但在上载映像时，它会生成以下错误：错误域=AFNetworkingErrorDomain代码=-1011“请求失败：内部服务器错误（500）”用户信息=0x8e5de00{NSErrorFailingURLKey=，AFNetworkingOperationFailingURLResponseErrorKey=NSLocalizedDescription=请求失败：内部服务器错误（500）}，{“错误消息”：“未知服务器错误”}