ios - Activity indicator acting slow inside PHPhotoLibrary.sharedPhotoLibrary().performChanges -

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i'm deleting photo assets , want show activity indicator while assets being deleted , stop when assets have been deleted code acting slow, know wrong?

phphotolibrary.sharedphotolibrary().performchanges({             phassetchangerequest.deleteassets(enumeration)             self.activityindicator.startanimating()             uiapplication.sharedapplication().beginignoringinteractionevents()             }, completionhandler: {success, error in                 if success {                     self.activityindicator.stopanimating()                     uiapplication.sharedapplication().endignoringinteractionevents()                     println("success")                 } else {                     self.activityindicator.stopanimating()                     uiapplication.sharedapplication().endignoringinteractionevents()                     println("error")                 }         })

i solved myself, here's answer:

phphotolibrary.sharedphotolibrary().performchanges({             phassetchangerequest.deleteassets(enumeration)              let delay = 1 * double(nsec_per_sec)             let time = dispatch_time(dispatch_time_now, int64(delay))             dispatch_after(time, dispatch_get_main_queue()) {                 self.activityindicator.startanimating()             }             }, completionhandler: {success, error in                  uiapplication.sharedapplication().beginignoringinteractionevents()                  if success {                     println("good")                     dispatch_async(dispatch_get_main_queue()){                         self.activityindicator.stopanimating()                         self.navigationcontroller?.poptorootviewcontrolleranimated(true)                     }                     uiapplication.sharedapplication().endignoringinteractionevents()                 } else {                     println("bad")                     dispatch_async(dispatch_get_main_queue()){                         self.activityindicator.stopanimating()                     }                     uiapplication.sharedapplication().endignoringinteractionevents()                 }         })

just needed add:

dispatch_async(dispatch_get_main_queue()){      self.activityindicator.stopanimating() }

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