iOS SimplePingDelegate 回调方法未触发

Question

我需要通过SimplePing库在我的iOS应用程序中ping一个主机名。委托方法在 ping 后不触发？。start(( 被调用。

    //code to actually ping
    var pinger: SimplePing?
    var canStartPinging = false
    func ping() {
        pinger = SimplePing(hostName: "www.apple.com")        
        pinger?.delegate = self
        pinger?.start()
        repeat {
            print("Repeat loop (String(describing: 
    pinger?.hostName))")
            if (canStartPinging) {
                pinger?.send(with: nil)
            }
            RunLoop.current.run(mode: RunLoop.Mode.default, before: 
    (NSDate.distantFuture ))
        } while(pinger != nil)
    }
    //SimplePingDelegate Methods below
    extension WelcomeViewController: SimplePingDelegate {
    private func simplePing(pinger: SimplePing!, didFailToSendPacket 
    packet: NSData!, error: NSError!) {
        print("didFailToSendPacket")
    }
    private func simplePing(pinger: SimplePing, didFailWithError error: 
    NSError) {
        print("didFailWithError")
    }
    private func simplePing(pinger: SimplePing!, 
    didReceivePingResponsePacket packet: NSData!) {
        print("didReceivePingResponsePacket")
    }
    private func simplePing(pinger: SimplePing!, 
    didReceiveUnexpectedPacket packet: NSData!) {
        print("didReceiveUnexpectedPacket")
    }
    private func simplePing(pinger: SimplePing!, didSendPacket packet: 
    NSData!) {
        print("didSendPacket")
    }

    private  func simplePing(pinger: SimplePing!, didStartWithAddress 
    address: NSData!) {
        print("didStartWithAddress : (String(describing: address))")
        canStartPinging = true
        }
    }

未收到来自委托的回调。循环运行，但没有任何反应。打印"Repeat loop Optional("www.apple.com"("，并且从不打印 didStartWithAddress 或 didFailWithError。

Answer 1

事实证明，

委托方法的方法签名不正确。填充委托方法的最佳方法是开始键入 simplePing 并允许 Xcode 建议方法完成选项！