Question

我正在尝试使用SwiftR.connect实现SignalR - 我遵循了tutorial。

获得以下错误。

 Starting...
 Error: Optional(["message": Error during negotiation request.]) 
 Disconnected.

我的源代码

import UIKit
import SwiftR

class ViewController: UIViewController {

    @IBOutlet weak var statusLabel: UILabel!
    @IBOutlet weak var startButton: UIButton!

    var chatHub: Hub!
    var connection: SignalR!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        SwiftR.useWKWebView = true

        SwiftR.signalRVersion = .v2_2_1
        SwiftR.transport = .longPolling          

        connection = SwiftR.connect("http://192.168.X.XX/MyChatApplicationServer/signalr") { [weak self] connection in

            self?.chatHub = connection.createHubProxy("MyChatHub")
            self?.chatHub?.on("newMessageReceived") { args in
                print("MyChatHub on call start")

                let message = args![0] as! String
                let detail = args![1] as! String

                print("Message: \(message) \nDetail: \(detail)")

            }

            // SignalR events
            connection.starting = { [weak self] in
                self?.statusLabel.text = "Starting..."
                self?.startButton.isEnabled = false
                print("Starting....")
            }

            connection.reconnecting = { [weak self] in
                self?.statusLabel.text = "Reconnecting..."
                self?.startButton.isEnabled = false
                print("Reconnecting....")
            }

            connection.connected = { [weak self] in
                print("Connection ID: \(connection.connectionID!)")
                self?.statusLabel.text = "Connected"
                self?.startButton.isEnabled = true
                self?.startButton.setTitle("Stop", for: .normal)
                print("Connected")
            }

            connection.reconnected = { [weak self] in
                self?.statusLabel.text = "Reconnected. Connection ID: \(connection.connectionID!)"
                self?.startButton.isEnabled = true
                self?.startButton.setTitle("Stop", for: .normal)
                print("Stop")
            }

            connection.disconnected = { [weak self] in
                self?.statusLabel.text = "Disconnected"
                self?.startButton.isEnabled = true
                self?.startButton.setTitle("Start", for: .normal)
                print("Disconnected")
            }

            connection.connectionSlow = { print("Connection slow...") }

            connection.error = { error in
                print("Error: \(error)")

                // Here's an example of how to automatically reconnect after a timeout.
                //
                // For example, on the device, if the app is in the background long enough
                // for the SignalR connection to time out, you'll get disconnected/error
                // notifications when the app becomes active again.

                if let source = error?["source"] as? String, source == "TimeoutException" {
                    print("Connection timed out. Restarting...")
                    connection.start()
                }
            }

            connection.start()
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func startStop(_ sender: Any) {

        if let text = startButton.titleLabel?.text{
            print("text val: \(text)")
            connection?.start()
        }else{
            connection?.stop()
        }
    }

}

注意： 1）我使用 pod'SwiftR'更新了SignalR 安装 2）根据教程我正在使用 swift23分支代码 3）在 pod SwiftR库下面的代码不起作用。

连接= SigmalR（ “http://192.168.X.XX/MyChatApplicationServer/signalr”）

获得以下错误。

"Cannot invoke initializer for type 'SignalR' with an argument list of type '(String)'"

如果我遵循主分行代码。

请帮我解决这个问题。提前谢谢。

Answer 1

检查您使用的代表this issue。

我建议考虑ObjC implementation.因为它只是pod，所以没什么不好的。

Answer 2

刚刚评论了以下代码，它运行正常。 //SwiftR.useWKWebView = true

Answer 3

此问题已在GitHub中讨论过。点击https://github.com/adamhartford/SwiftR/issues/75

是否适用于SwiftR.useWKWebView = false？

如果是这样，请确保在服务器上启用了CORS。 WKWebView需要CORS才能使用SwiftR。

使用Swift 3.0实现SignalR

3 个答案: