在iOS上如何获取用户在Twitter上关注的关注者列表？

In my app I would like to send a direct message to Twitter friends to invite to use the app. In order to send a direct message I need the target person to follow the user. How ever I don't want to list all the followers but only the followers that the user is also following. Is there a way to get this list in iOS?In my app I would like to send a direct message