How to implement real-time chat function in uniapp

How to implement real-time chat function in uniapp

Nowadays, with the continuous development of mobile Internet, real-time chat function has become one of the necessary functions of many applications. For developers, how to implement real-time chat functionality in uniapp has become an important topic. This article will introduce how to use WebSocket to implement real-time chat function in uniapp and provide code examples.

1. What is WebSocket

WebSocket is a communication protocol for full-duplex communication on a single TCP connection. Compared with the request-response mode of the HTTP protocol, WebSocket allows real-time, two-way data transmission between the server and the client. In real-time chat applications, WebSocket can provide a more stable and efficient communication mechanism.

2. WebSocket in uniapp

uniapp is a cross-platform development framework that can simultaneously develop applications running on iOS, Android and Web platforms. In uniapp, developers can use uniapp's built-in uni.request method to implement WebSocket connections. The following is a sample code:

1. The way to introduce the uni.request method in the page is as follows:

import {uni_request} from '@/utils/index.js';

2. Add the connect method in the methods of the page:

methods: {
  // 连接WebSocket
  connect() {
    uni.connectSocket({
      url: 'wss://your-websocket-url', // WebSocket的地址
    });

    uni.onSocketOpen(function () {
      console.log('WebSocket连接已打开！');
    });

    uni.onSocketError(function (res) {
      console.log('WebSocket连接打开失败，请检查网络！');
    });
  }
},

3. Call the connect method in the page's onLoad life cycle:

onLoad() {
  this.connect();
},

4. Call the close method in the page's onUnload life cycle to close the WebSocket connection:

onUnload() {
  uni.closeSocket()
},

Through the above code, we have realized connecting to the specified server through WebSocket in uniapp.

3. Real-time chat

With WebSocket connection, we can realize real-time chat function by sending and receiving messages. The following is a sample code to implement a simple real-time chat function:

1. Define data data in the page:

data() {
  return {
    messageList: [], // 消息列表
    inputValue: '' // 用户输入的消息内容
  }
},

2. Add the sendMessage method in the methods of the page Send a message:

methods: {
  // 发送消息
  sendMessage() {
    const message = {
      content: this.inputValue, // 消息内容
      time: new Date().getTime() // 发送时间
    };

    // 将消息添加到消息列表
    this.messageList.push(message);

    // 清空输入框内容
    this.inputValue = '';

    // 发送消息给服务器
    uni.sendSocketMessage({
      data: JSON.stringify(message)
    });
  }
},

3. Receive the message sent by the server in the onSocketMessage event of the page and update the message list:

onSocketMessage(res) {
  const message = JSON.parse(res.data);

  // 将消息添加到消息列表
  this.messageList.push(message);
},

Through the above code, we achieve The ability to send and receive messages in real time in uniapp.

4. Summary

This article introduces how to use WebSocket to implement real-time chat function in uniapp, and provides corresponding code examples. During the actual development process, developers can customize extensions according to specific needs, such as adding user login verification, message storage and query, etc. I hope this article will be helpful to implement the real-time chat function of uniapp.

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