Use uniapp to implement QR code scanning function

Use uniapp to implement QR code scanning function

In recent years, QR code scanning has become an indispensable part of our daily lives. By scanning the QR code, we can quickly obtain various information, implement payment, login and other functions. This article will introduce how to use the uniapp framework to implement the QR code scanning function and provide specific code examples.

uniapp is a powerful cross-platform application development framework that can run one set of code on multiple platforms at the same time, including iOS, Android, H5, etc. With the help of uniapp's rich plug-ins and powerful cross-platform capabilities, we can quickly implement the QR code scanning function.

First of all, we need to introduce the uni-app-qrcode plug-in into the uniapp project. This plug-in encapsulates the native code scanning function, provides a simple and easy-to-use API, and realizes scanning, parsing, and generating QR codes. Function. We can install it through npm, or download the plug-in manually and use it. The specific operations are as follows:

1. Install using npm:

   npm install uni-app-qrcode -S

2. Manually download and import:
   Create the components folder in the /src directory of the uniapp project, and create the qrcode folder under this folder, and add the plug-in code Copy to this folder.

Next, we need to introduce the QR code scanning function into the uniapp page. We can introduce the plug-in code in the <script></script> tag of the page where the code scanning function needs to be called, and define a code scanning function, as shown below:

import QRCodeScanner from '@/components/qrcode/qr-code-scanner.vue'

export default {
  components: {
    QRCodeScanner
  },
  data() {
    return {
      qrcode: ''  // 用于存储扫描结果
    }
  },
  methods: {
    onScanSuccess(result) {
      this.qrcode = result       // 将扫描结果赋值给qrcode变量
    },
    onScanError(error) {
      console.log('扫描失败：' + error)
    }
  }
}

In the # of the page In the ##

In the above code, we listen through

@scanSuccess The scanSuccess event of the QRCodeScanner component will trigger the onScanSuccess method once the scan is successful; similarly, the onScanError will be called when the scanError event is triggered. method. After the scan is successful, we can assign the result to the qrcode variable and display it on the page.

So far, we have completed the implementation of the QR code scanning function in uniapp. Run the project and test it on a device that supports QR code scanning. You can see that after the scan is successful, the scan result will be assigned to the

qrcode variable and displayed on the page.

To sum up, it is very simple to use uniapp to implement the QR code scanning function. You only need to introduce the uni-app-qrcode plug-in and use the code scanning component in the page. This article provides specific code examples for using uniapp to implement QR code scanning. I hope it will be helpful to everyone. Let us enjoy the convenient QR code scanning function and bring more convenience to our lives!

The above is the detailed content of Use uniapp to implement QR code scanning function. For more information, please follow other related articles on the PHP Chinese website!