uniapp implements how to use WebSocket for real-time communication

uniapp implements how to use WebSocket for real-time communication

WebSocket is a protocol for two-way communication between the client and the server, through which real-time data can be achieved Transmission and message push. Using WebSocket in uniapp can realize the function of real-time communication. This article will introduce how to use WebSocket in uniapp and provide specific code examples.

1. Introducing WebSocket
   In the uniapp project, we can introduce the WebSocket plug-in through the uni.requireNativePlugin() function. First, add the following code in the "plugins" field in the manifest.json file of the project:

"websocket": {
  "version": "1.0.0",
  "provider": "uni-socket.io"
}

The WebSocket plug-in uni-socket.io is used here, you can also choose other WebSocket plugin.
Then, in the page that needs to use WebSocket, introduce the WebSocket plug-in:

import SocketIO from '@/js_sdk/socket.io/socket.io';

2. Connect to the WebSocket server
   Where we need to establish a connection with the WebSocket server, we can use the following code to Connect to the server:

let socket = SocketIO.connect('http://your-websocket-server.com');

http://your-websocket-server.com here is the address of your WebSocket server, replace it with your own address.

3. Listening to WebSocket events
   After the connection is successful, we can listen to different WebSocket events so that when the server sends data, it can receive and process it accordingly. The following are some commonly used event monitoring examples:

// 连接成功事件
socket.on('connect', () => {
  console.log('WebSocket连接成功');
});

// 断开连接事件
socket.on('disconnect', () => {
  console.log('WebSocket断开连接');
});

// 接收到服务器发送的消息事件
socket.on('message', (data) => {
  console.log('接收到消息：', data);
});

// 接收到服务器发送的自定义事件
socket.on('customEvent', (data) => {
  console.log('接收到自定义事件：', data);
});

4. Send a message to the server
   Sending a message to the WebSocket server in uniapp is very simple, just call the socket.emit() function. Can. Here is an example of sending a message:

socket.emit('chatMessage', 'Hello WebSocket');

Here a custom event called chatMessage is sent and a string is passed as a parameter.

5. Close the WebSocket connection
   When you no longer need to use WebSocket, you can close the WebSocket connection by calling socket.close():

socket.close();

Through the above steps, We can use WebSocket in uniapp for real-time communication. WebSocket can play an important role when real-time data interaction or message push is required with the server. In actual development, WebSocket can be used and expanded according to specific needs.

I hope the above content will help you understand and use WebSocket in uniapp. If you need to know more, you can consult the official documentation of uniapp and WebSocket, or you can refer to the experience sharing and problem discussions of other developers in the uniapp community. I wish you success in developing real-time communication features using uniapp!

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