ios - Socket.io - 维护套接字连接(Swift)

Question

我正在制作一个使用 socket.io 的 iOS 应用程序。场景非常简单，一个人预定了一次冒险，即使用 emit 命令发送数据。之后，我使用了 socket.on 来从服务器获取响应。这在一段时间内工作得很好，但现在我遇到了问题。数据既没有到达服务器，也没有响应返回。我搜索了这个问题，得到的理解是:

在某些时候套接字会断开连接，因此它会停止工作。我什至在发送数据之前使用了 socket.reconnect 但它没有用。

我为 node.js 找到了 forceNew 的参数，但在 swift 中没有找到它的任何替代项。

这是我的代码(与 socket.io 相关):

在 AppDelegate 中:

AppDelegate.socket = SocketIOClient(socketURL: URL(string: "######")!, config: [.log(true), .compress])
AppDelegate.socket.connect ()

在 View Controller 中:

override func viewDidLoad() {
        super.viewDidLoad()

        socket = AppDelegate.socket

          self.socket.on("book-adventure-seeker") {[weak self] data, ack in
              print (data)
         }
    }
    @IBAction func bookAdventureTapped(_ sender: Any) {

        let jwtToken = UserDefaults.standard.string(forKey: "jwtToken")

        let data = ["adventure_id": adventureId, "jwt": jwtToken] as [String : Any]
        self.socket.emit("book-adventure", data)
    }

日志是:

2017-10-20 09:45:04.665 CuufyPrototype[2591:94370] LOG SocketEngine: Writing ws:  has data: false
2017-10-20 09:45:08.541 CuufyPrototype[2591:93618] LOG SocketIOClient: Emitting: 2["book-adventure",{"jwt":"######","adventure_id":"######"}]
2017-10-20 09:45:08.541 CuufyPrototype[2591:94370] LOG SocketEngine: Sending ws:  as type: 2
SocketIOClientStatus
2017-10-20 09:45:22.804 CuufyPrototype[2591:94370] LOG SocketEngine: Writing ws: 2["book-adventure",{"jwt":"######","adventure_id":"#####"}] has data: false
2017-10-20 09:45:22.805 CuufyPrototype[2591:94370] LOG SocketEngine: Sending ws: 2["book-adventure",{"jwt":"#######","adventure_id":"######"}] as type: 4
2017-10-20 09:45:22.807 CuufyPrototype[2591:94370] LOG SocketEngine: Writing ws:  has data: false
2017-10-20 09:45:22.807 CuufyPrototype[2591:94370] LOG SocketEngine: Sending ws:  as type: 2
2017-10-20 09:45:22.810 CuufyPrototype[2591:93661] ERROR SocketEngine: 
2017-10-20 09:45:22.811 CuufyPrototype[2591:93618] ERROR SocketIOClient: 
2017-10-20 09:45:22.811 CuufyPrototype[2591:93618] LOG SocketIOClient: Handling event: error with data: [""]
2017-10-20 09:45:22.811 CuufyPrototype[2591:93618] LOG SocketIOClient: Handling event: statusChange with data: [SocketIO.SocketIOClientStatus]
2017-10-20 09:45:22.812 CuufyPrototype[2591:93618] LOG SocketIOClient: Starting reconnect
2017-10-20 09:45:22.812 CuufyPrototype[2591:93618] LOG SocketIOClient: Handling event: reconnect with data: [""]
2017-10-20 09:45:22.812 CuufyPrototype[2591:93618] LOG SocketIOClient: Trying to reconnect
2017-10-20 09:45:22.812 CuufyPrototype[2591:93618] LOG SocketIOClient: Handling event: reconnectAttempt with data: [-1]
2017-10-20 09:45:22.812 CuufyPrototype[2591:93618] LOG SocketIOClient: Handling event: statusChange with data: [SocketIO.SocketIOClientStatus]

即使我尝试像这样在 AppDelegate 中使用 socket.on:(如官方文档中的示例)

AppDelegate.socket = SocketIOClient(socketURL: URL(string: "#######")!, config: [.log(true), .compress])

        AppDelegate.socket.on("book-adventure-seeker") {[weak self] data, ack in
            print (data)
        }
  AppDelegate.socket.connect ()

但它仍然对我不起作用。

更新:有时在发出命令时，Engine is being closed 出现在日志中，但我不知道如何解决这个问题。

Answer 1

在 swift 中将此代码用于 forceNew:

let config : [String: Any] = ["log": true,
                                  "compress": true,
                                  "forcePolling": true,
                                  "forceNew": true]
    var socketManager = SocketManager(socketURL: url, config: config)
    var socket: SocketIOClient = socketManager.defaultSocket