xcode - IOS 8 swift CoreLocation -


im learning xcode 6.3 , swift , following book apress beginning xcode swift, in chapter 4 when doing first tab location tracker shows nothing @ , i'm confused. code first tab this

import uikit import corelocation  class trackviewcontroller: uiviewcontroller, cllocationmanagerdelegate {       var locationmanager: cllocationmanager!     @iboutlet weak var locationtext: uitextview!     @iboutlet weak var toggleswitch: uiswitch!       override func viewdidload() {         super.viewdidload()         // additional setup after loading view, typically nib.     }      override func didreceivememorywarning() {         super.didreceivememorywarning()         // dispose of resources can recreated.     }      @ibaction func changetoggle(sender: uiswitch) {          if toggleswitch.on {              self.locationtext.text = " "              if (cllocationmanager.locationservicesenabled() == false) {                 self.toggleswitch.on = false             }              if locationmanager == nil {                 locationmanager = cllocationmanager()                 locationmanager.delegate = self                 locationmanager.distancefilter = 10.0                 locationmanager.desiredaccuracy = kcllocationaccuracynearesttenmeters                 locationmanager.requestwheninuseauthorization()                 uiapplication.sharedapplication().cancelalllocalnotifications()                 nslog("location on supposely")              }              locationmanager.startupdatinglocation()           } else {              if locationmanager != nil {                 locationmanager.stopupdatinglocation()              }         }      }      func locationmanager(manager: cllocationmanager!, didupdatelocations locations: [anyobject]!) {          var location: cllocation = locations[locations.endindex - 1] as! cllocation          self.locationtext.text = location.description      }      func locationmanager(manager: cllocationmanager!, didfailwitherror error: nserror!) {          locationtext.text = "failed error \(error.description)"      } }

i have activated in simulator location services , in info.plist added nslocationwheninusagedescription , privacy - location..., nothing happens when toggling switch no feedback on. help??


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