ios - How to remove a GeoFire handle for the following observe in Swift?

Question

This is a question for Swift, Firebase and Geofire.

I would like to know how to remove a GeoFire handle for the following observer in Swift.

locationsEnd!.query(at: location, withRadius: 16.0).observe(GFEventType.init(rawValue: 0)!, with: {(key, location) in

The following works fine (in viewDidDisappear):

locationsEnd?.firebaseRef.removeAllObservers()

However with handle it does not:

var locationHandle: UInt = 0

override func viewDidDisappear(_ animated: Bool) {
    super.viewDidDisappear(animated)

    //following does not work:
    locationsEnd?.firebaseRef.removeObserver(withHandle: locationHandle)
}

func aroundMe(_ location: CLLocation){

        locationHandle = locationsEnd!.query(at: location, withRadius: 16.0).observe(GFEventType.init(rawValue: 0)!, with: {(key, location) in

            //etc
        })
}

I've tried the locationHandle as follows, without success:

var locationHandle = FirebaseHandle()
var locationHandle: FirebaseHandle = 0
var locationHandle: UInt!
var locationHandle: UInt = 0
var locationHandle = FIRDatabaseHandle()
var locationHandle: FirebaseHandle = 0

Any suggestions would be great, as mentioned I can just remove all observers, but elsewhere I need to just remove a handle.

Answer 1

Waitting for answers