AFN传文件和参数

使用AFNetWorking传文件和参数：

#pragma mark - 上传问题图片

- (void)uploadQuestionImage:(UIImage *)questionImage withQuestionID:(NSString *)questionID
{
    AppDelegate * app = [UIApplication sharedApplication].delegate;
   
    NSData *imageData = UIImageJPEGRepresentation(self.questionImage, 1.0);
   
    NSMutableDictionary * parameters = [NSMutableDictionary dictionary];
   
    [parameters setObject:questionID forKey:@"exID"];
   
    NSMutableURLRequest *request = [[AFHTTPClient clientWithBaseURL:[NSURL URLWithString:dUrl_serverAddress]] multipartFormRequestWithMethod:@"POST" path:@"Path/UploadTitleImage/" parameters:parameters constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
       
        [formData appendPartWithFileData:imageData name:@"image" fileName:@"quePic.jpg" mimeType:@"image/jpeg"];  //图片
    }];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
   
    [operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
        float progress = totalBytesWritten / (float)totalBytesExpectedToWrite;
        NSLog(@"Sent Pic %f ..",progress);
       
    }];
   
   
    [operation start];
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
       
        NSLog(@" QuestionPictureUploadDidFinish:  %@ ",[operation responseString]);
        NSString * response =[operation responseString];
       
        NSError *error = nil;
        NSData *fileIdData = [response dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *dicRoot = [NSJSONSerialization JSONObjectWithData:fileIdData options:NSJSONReadingMutableLeaves error:&error];
        NSDictionary *dictfil = [dicRoot objectForKey:@"json"];
       
       
        int state = [[dictfil valueForKey:@"state"] intValue];
        //上传成功
        if (state==1)
        {
            NSString *msg = [NSString stringWithFormat:@"%@", [dictfil objectForKey:@"msg"]];
            [app showMsg:msg];
        }
        //上传失败
        else
        {
            NSString *msg = [NSString stringWithFormat:@"%@", [dictfil objectForKey:@"msg"]];
            [app showMsg:msg];
        }
       
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"上传失败 error: %@",  operation.responseString);
        [app showMsg:@"上传失败"];
       
    }];

}