- (void)upload{
  NSData *imageData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"mine.jpeg" ofType:nil]];
  NSDictionary* URLParameters = @{//设置请求头 };
  NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"mine.jpeg" ofType:nil]];
  NSURLRequest *request = [NSURLRequest requestWithURL:url];
  NSURLResponse *repsonse = nil;
  [NSURLConnection sendSynchronousRequest:request returningResponse:&repsonse error:nil];
  
  NSString *mimeType = repsonse.MIMEType;
  NSLog(@"%@", repsonse.MIMEType);
  
  [[AFHTTPSessionManager manager] POST:@"上传网址" parameters:URLParameters constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) {
    [formData appendPartWithFileData:imageData name:@"file" fileName:@"mine.jpeg" mimeType:mimeType];
  } progress:^(NSProgress * _Nonnull uploadProgress) {
    //
    
  } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
    //处理成功
    
  } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
    //处理失败
    
  }];  
}