ios - Parse time format "2015-07-14T09:00:00:+08:000" return nil -

i try parse time keeps returning nil. there have missed?

 var datetime =  "2015-07-14t09:00:00:+08:000"     var dateformatter = nsdateformatter()     dateformatter.dateformat = "yyyy-mm-dd't'hh:mm:ss:z"     if let date : nsdate = dateformatter.datefromstring(datetime){         var timeformatter = nsdateformatter()         timeformatter.timestyle = nsdateformatterstyle.shortstyle         let timestring = timeformatter.stringfromdate(date)         xvalues.addobject(timestring)     } 

+08:000 wrong timezone specification date format. should +08:00 only, e.g. 8hrs 0min