如何判断哪个套接字连接使用socket.io单击了一个按钮？ [英] how can you tell which socket connection clicked a button using socket.io?

问题描述

如果您在页面上有一个按钮，并且您想确保在另一个套接字点击其按钮之前无法再次单击该按钮。

if you have a a button on the page and you want to make sure the button cannot be clicked again before another socket clicks their button.

如果套接字a单击了我应禁用该按钮，直到另一个套接字发送一条消息，表明他们点击了他们的按钮，然后返回第四个。

if socket a clicked i should disable the button until another socket sends a message that they clicked their button and back and fourth.

$(".buttonTurns").on("click", function(){
        socket.emit("turnbutton click")
})

并且当他们连接时他们不输入任何名字

and they dont input any names when they connect

推荐答案

每个socket.io会话都会自动分配一个唯一的字符串作为id。在服务器上，您可以从以下位置获取：

Every socket.io session is automatically assigned a unique string as an id. On the server you can get it from:

socket.id

如果您在会话中（即返回套接字对象的连接），您只需执行以下操作即可将消息发送回客户端：

If you are inside a session (that is, the connection that returns the socket object) you can send messages back to the client by simply doing:

socket.emit('event name',data);

但是如果你想向另一个会话发送消息，那么你需要这样做：

But if you want to send a message to a different session then you need to do:

io.sockets.socket(socket_id).emit('event name',data);

如果您想向所有已连接的会话发送消息，请执行以下操作：

If you want to send a message to all connected sessions then just do:

io.emit('event name', data); // broadcast

---

如果您的应用程序具有需要的状态要管理，然后一种技术是使用套接字ID作为密钥将它们存储在对象中：

---

If your application have state that needs to be managed, then one technique is to store them in an object using the socket id as the key:

var buttonState = {}

io.on('connection',function('socket'){
    // default button to off when socket connects:
    bottonState[socket.id] = 'off';

    socket.on('on button',function(){
        bottonState[socket.id] = 'on';
    })

    socket.on('off button',function(){
        bottonState[socket.id] = 'off';
    })
})

现在您可以管理服务器上每个客户端的个别状态，您可以使用它来与其他客户端进行通信。

Now that you can manage the individual state for each individual client on the server you can use that to communicate them to other clients.

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