Swift SimplePing不工作

我正在使用SimplePing来获取我的swift应用程序中的延迟，但我没有得到任何结果。Swift SimplePing不工作

这是代码采取的形式，这里的例子中SO：

import Foundation 

public typealias SimplePingClientCallback = (String?)->() 

public class SimplePingClient: NSObject { 
    static let singletonPC = SimplePingClient() 

    private var resultCallback: SimplePingClientCallback? 
    private var pingClinet: SimplePing? 
    private var dateReference: NSDate? 

    public static func pingHostname(hostname: String, andResultCallback callback: SimplePingClientCallback?) { 
     singletonPC.pingHostname(hostname, andResultCallback: callback) 
    } 

    public func pingHostname(hostname: String, andResultCallback callback: SimplePingClientCallback?) { 
     resultCallback = callback 
     pingClinet = SimplePing(hostName: hostname) 
     pingClinet?.delegate = self 
     pingClinet?.start() 
    } 
} 

extension SimplePingClient: SimplePingDelegate { 
    public func simplePing(pinger: SimplePing, didStartWithAddress address: NSData) { 
     pinger.sendPingWithData(nil) 
    } 

    public func simplePing(pinger: SimplePing, didFailWithError error: NSError) { 
     resultCallback?(nil) 
    } 

    public func simplePing(pinger: SimplePing!, didSendPacket packet: NSData!) { 
     dateReference = NSDate() 
    } 

    public func simplePing(pinger: SimplePing!, didFailToSendPacket packet: NSData!, error: NSError!) { 
     pinger.stop() 
     resultCallback?(nil) 
    } 

    public func simplePing(pinger: SimplePing, didReceiveUnexpectedPacket packet: NSData) { 
     pinger.stop() 
     resultCallback?(nil) 
    } 

    public func simplePing(pinger: SimplePing!, didReceivePingResponsePacket packet: NSData!) { 
     pinger.stop() 

     guard let dateReference = dateReference else { return } 

     //timeIntervalSinceDate returns seconds, so we convert to milis 
     let latency = NSDate().timeIntervalSinceDate(dateReference) * 1000 

     resultCallback?(String(format: "%.f", latency)) 
    } 
}

，并调用SimplePing在我的viewController我这样做：

let simplePingClient = SimplePingClient() 
     simplePingClient.pingHostname("www.apple.com") { latency in 
     print("Your latency is \(latency ?? "unknown")") 
     self.labelTempsReponse?.text = latency 
     }

当我把一个断点在该行：

simplePingClient.pingHostname("www.apple.com") { latency in

结果全部为零（在resultCallBack，所述pingClient和dateReference）。我做了一项研究来解决这个问题，我发现一个类似于我的question，但在客观的c。

任何人都可以帮助我吗？

来源

2016-09-27 Ne AS

simplePingClient是否会超出范围？在这种情况下，simplePing将会关闭。尝试声明为一个全局变量：

var simplePingClient : SimplePingClient!

，然后这应该工作：

simplePingClient = SimplePingClient() 
    simplePingClient.pingHostname("www.apple.com") { latency in 
    print("Your latency is \(latency ?? "unknown")") 
    self.labelTempsReponse?.text = latency 
    }

来源

2017-06-17 11:37:51

Swift SimplePing不工作

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