上传图片xcode wcf服务

Question

我有服务wcf，它具有用于上传图像的功能

1

Public Function Upload(ByVal UploadData As UploadData) As UploadReturn 

2

Public Structure UploadData
    Public StrStream As Stream
End Structure

3 xcode

我正在使用afhttprequestmanager

parameters:@{@"StrStream":[NSData dataWithData:imageData]}

如何将数据从xcode作为流发送到此函数？