stop performseguewithidentifier once executed

Question

I have this code to update distance using beacons.

func updateDistance(distance: CLProximity) {
    UIView.animateWithDuration(0.8) {
        switch distance {
        case .Unknown:
            print("unknown")
        case .Far:
            print("far")
        case .Near:
            print("near")
        case .Immediate:
             print("Immediate")
             self.performSegueWithIdentifier("beaconSegue", sender: self)
        }
    }
}

I would just like to ask if how to stop the self.performSegueWithIdentifier function once its already executed.

Answer 1

Just set a flag when you first perform the segue. Like this:

var seguePerformed = false

func updateDistance(distance: CLProximity) {
    UIView.animateWithDuration(0.8) {
        switch distance {
        case .Unknown:
            print("unknown")
        case .Far:
            print("far")
        case .Near:
            print("near")
        case .Immediate:
             print("Immediate")
             if !self.seguePerformed {
                 self.seguePerformed = true
                 self.performSegueWithIdentifier("beaconSegue", sender: self)
             }
        }
    }
}