<pre>
class ReachabilityHelper {
static func reach(_ reachable: @escaping (_ wifi:Bool) -> Void, unreachable: @escaping () -> Void) {
let reachability = Reachability()!
reachability.whenReachable = { reachability in
// this is called on a background thread, but UI updates must
// be on the main thread, like this:
DispatchQueue.main.async {
if reachability.isReachableViaWiFi {
// print("Reachable via WiFi")
reachable(true)
} else {
// print("Reachable via Cellular")
reachable(false)
}
}
}
reachability.whenUnreachable = { reachability in
// this is called on a background thread, but UI updates must
// be on the main thread, like this:
DispatchQueue.main.async {
// print("Not reachable")
unreachable()
}
}
do {
try reachability.startNotifier()
} catch {
// print("Unable to start notifier")
}
}
}
</pre>
