添加带有选择器功能的观察者时,NotificationCenter会抛出错误

时间:2017-07-13 12:57:04

标签: ios socket.io nsnotificationcenter

在服务器端,我使用socket.io库在用户输入设备时发送一些JS对象数据类型:

var typingUsers = {};

    clientSocket.on("startType", function(clientNickname){
        typingUsers[clientNickname] = 1;
        io.emit("userTypingUpdate", typingUsers);
    });

当应用收到数据时,它会发布通知:

 private func listenForOtherMessages() {
     socket.on("userTypingUpdate") { (dataArray, socketAck) -> Void in
     NotificationCenter.default.post(name:NSNotification.Name(rawValue: "userTypingNotification"), object: dataArray[0] as! [String: AnyObject])
       }
  }

然后通知作为观察者添加到视图控制器中:

NotificationCenter.default.addObserver(self, selector: Selector(("handleDisconnectedUserUpdateNotification:")), name: NSNotification.Name(rawValue: "userWasDisconnectedNotification"), object: nil) 

此实现总是抛出错误“无法识别的选择器发送到...”

但是没有选择器的以下实现工作正常:

NotificationCenter.default.addObserver(forName:NSNotification.Name(rawValue: "userTypingNotification"), object: nil, queue: nil){ object in
             print(object)

}

似乎我无法向观察者添加选择器,我认为问题可能在于对象数据类型,但我无法弄清楚为什么......

1 个答案:

答案 0 :(得分:0)

找到了答案:

NotificationCenter.default.addObserver(self, selector: #selector(self.userTypingNotification), name: NSNotification.Name(rawValue: "userWasDisconnectedNotification"), object: nil)

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