在swift中自动检测互联网？

Question

我想连续检查有效的互联网连接。如果互联网可用，则应调用一些回调方法，或者如果关闭互联网，则不应调用回叫方法。请告诉我该怎么办？< / p>

我使用以下代码检查互联网是否可用？

  NotificationCenter.default.addObserver(self, selector: #selector(checkForReachability), name: ReachabilityChangedNotification, object: reachability)
    do {

        try reachability?.startNotifier()
    }
    catch {
    DILog.print(items: "Error Occured")
    }




func checkForReachability(notification:NSNotification) {
        let networkReachability = notification.object as! Reachability;
        let remoteHostStatus = networkReachability.currentReachabilityStatus

        if (remoteHostStatus == .notReachable) {
            DILog.print(items: "Not Reachable")
        }
        else if (remoteHostStatus == .reachableViaWiFi) {
            DILog.print(items: "Reachable")
        }
    }