How does the uniapp application implement QR code generation and code scanning recognition?

How does the uniapp application realize QR code generation and code scanning recognition? Specific code examples need to be attached

1. Introduction
In today's society, QR codes have become a convenient and fast way to transmit information. uniapp is a cross-platform development framework based on Vue.js, which can build applications for multiple platforms such as iOS, Android and Web at the same time. This article will introduce how to implement QR code generation and code scanning recognition in the uniapp application, and provide corresponding code examples.

2. QR code generation

1. Introducing the QR code generation plug-in
   In the "manifest.json" file of the uniapp project, find the "dependencies" field and add " uni-qr" plug-in depends on it and saves the file.

{
  "dependencies": {
    "uni-qr": "^1.0.0"
  }
}

2. Use the QR code generation plug-in
   Introduce the QR code generation plug-in on the page where the QR code needs to be generated, and call the generated QR code in the method used The function.

<template>
  <view class="content">
    <qr :text="qrText" :size="qrSize"></qr>
  </view>
</template>

<script>
  import qr from 'uni-qr'

  export default {
    data() {
      return {
        qrText: 'http://www.example.com',
        qrSize: 200
      }
    },
    components: {
      qr
    }
  }
</script>

3. Code scanning identification

1. Introducing the code scanning identification plug-in
   In the "manifest.json" file, add the "uni.scanCode" plug-in dependency.

{
  "dependencies": {
    "uni.scanCode": "^1.0.0"
  }
}

2. Use the code scanning recognition plug-in
   Introduce the code scanning recognition plug-in into the page that needs to be scanned for code recognition, and call the code scanning recognition function in the corresponding method.

<template>
  <view class="content">
    <view class="result">{{ scanResult }}</view>
    <button @click="scanCode">扫码识别</button>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        scanResult: ''
      }
    },
    methods: {
      scanCode() {
        uni.scanCode({
          success: (res) => {
            if (res.result) {
              this.scanResult = res.result
            }
          }
        })
      }
    }
  }
</script>

4. Summary
Through the above steps, we can realize the QR code generation and code scanning recognition functions in the uniapp application. By introducing the corresponding plug-in and calling the interface function provided by the plug-in, we can easily implement these two functions, and the code is concise and clear. Hope this article helps you!

The above is the detailed content of How does the uniapp application implement QR code generation and code scanning recognition?. For more information, please follow other related articles on the PHP Chinese website!