仅显示ISO 8601时间戳中的12小时时间格式

So I want to display just the time that is passed from our server in a label in my iOS App but I'm having trouble trying to figure out how to set up the right NSDateFormatter. So for example I get this timestamp from the Server in this format: 2013-02-27T18:15:00-0800, and I basically want to display "10:15 AM" in a label but so far I haven't had any luck. I tried this below: So I want to display just the time that is pass