What is the issue with ReachabilitySwift?

Question

In my viewDidLoad() function I call this method:

//MARK: Reachability
func startReachability(){
    //declare this property where it won't go out of scope relative to your listener
    do{
        let reachability = try Reachability.reachabilityForInternetConnection()

        reachability.whenReachable = { reachability in
            // this is called on a background thread, but UI updates must
            // be on the main thread, like this:
            dispatch_async(dispatch_get_main_queue()) {
                if reachability.isReachableViaWiFi() {
                    print("Reachable via WiFi")
                } else {
                    print("Reachable via Cellular")
                }
            }
        }
        reachability.whenUnreachable = { reachability in
            // this is called on a background thread, but UI updates must
            // be on the main thread, like this:
            dispatch_async(dispatch_get_main_queue()) {
                print("Not reachable")
            }
        }

        try reachability.startNotifier()

    } catch {
        print("Unable to start notifier")
    }
}

But it does not work. It calls whenReachable() and whenUnreachable() only once and when I turn Wi-Fi off and on it does nothing.

Answer 1

I needed a strong reference to Reachability instance! So I should have declared it at a class level.