ios - Activity Indicator doesn't work in Swift -

i trying show simple activity indicator when view controller loads until segue performed. want start activity indicator on viewdidload have had no luck far.

this code trying use:

import uikit  class loadingscreen: uiviewcontroller { //activity indicator view     @iboutlet weak var activityindicatorview: uiactivityindicatorview!      override func viewdidload() {         super.viewdidload()          //start animating         self.activityindicatorview.startanimating() } } 

i error: exc_bad_instruction assume means there's problem code i'm using.

i stop after function called delay:

delay(2.5) {              self.activityindicatorview.stopanimating() } 

assuming iboutlet working correctly (as mentioned in comment above). want stopanimating activityindicatorview within prepareforsegue:sender: method.

override func prepareforsegue(segue: uistoryboardsegue, sender: anyobject?) {     // might not need if statement     if (segue.identifier == "nameofyoursegue") {         self.activityindicatorview.stopanimating()     } }