Unity production QR code scanning

One 、 design sketch

Two 、dll download  

To generate a QR code, you need to use  zxing.unity.dll

link ：https://pan.baidu.com/s/166klhdbIi3mAesdp4JEn9A?pwd=syq1 
Extraction code ：syq1

stay unity Created in Plugins Folder , take dll Put in this folder

I used unity The version is 2019.4.32

3、 ... and . Create QR code

There are many cases about the generation and creation of QR code effects on the Internet. If you don't understand them, you can also check others , The basic code is almost the same , I sort it out here , The script added more comments .

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ZXing;
using ZXing.QrCode;

/// <summary>
///  Create QR code 
/// </summary>
public class CreatQR : MonoBehaviour {

    // Store texture pictures of QR code 
    Texture2D encoded;

    [Header(" Characters that need to produce QR code ")]
    public string QrCodeStr = "https://www.baidu.com/" ;
    [Header(" Display QR code on the screen  ")]
    public RawImage rawImg;

    void Start()
    {
        /* Initialize texture image 
         *  Be careful ： The width and height must be 256,
         *  Otherwise, an error occurs when the index exceeds the array boundary 
         */
        encoded = new Texture2D(256, 256); 
        CreatQr(); // Create and generate QR code 
    }

    #region  Generate qr code 

    /// <summary>  
    ///  Create QR code 
    /// </summary>  
    public void CreatQr()
    {
        if (QrCodeStr != string.Empty)
        {
            // Write the QR code into the picture     
            var color32 = Encode(QrCodeStr, encoded.width, encoded.height);
            encoded.SetPixels32(color32); // Change the pixel color of the texture 
            encoded.Apply();
            // The generated QR code picture is attached to RawImage    
            rawImg.texture = encoded;
        }
        else
            Debug.Log(" No information generated ");
    }

    /// <summary>
    ///  Generate qr code  
    /// </summary>
    /// <param name="textForEncoding"> The string that needs to produce QR code </param>
    /// <param name="width"> wide </param>
    /// <param name="height"> high </param>
    /// <returns></returns>       
    private static Color32[] Encode(string formatStr, int width, int height)
    {

        // Make some settings before drawing QR code 
        QrCodeEncodingOptions options = new QrCodeEncodingOptions();

        // Set the format of string conversion , Ensure that the string information remains correct 
        options.CharacterSet = "UTF-8";

        // Set the pixel values of the width and height of the drawing area 
        options.Width = width;
        options.Height = height;

        // Set the margin width of QR code （ The larger the value is, the wider the white space is , The QR code is reduced ）
        options.Margin = 1;

        /* Instantiate string drawing QR code tool 
         * BarcodeFormat: Barcode format 
         * Options：  Coding format （ Supported encoding formats ）
         */
        var barcodeWriter = new BarcodeWriter { Format = BarcodeFormat.QR_CODE, Options = options };
        // Draw the QR code and return the color array information of the picture 
        return barcodeWriter.Write(formatStr);

    }
    #endregion
}

Scene layout

Create a RawImage, Add Button Components and new CreatQR Script  

  Effect after operation ：

Scanning this QR code with a browser or other scannable software can jump to Baidu page

Four .unity Scan QR code  

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ZXing;

/// <summary>
///  Scan the picture 
/// </summary>
public class ScanQRCode : MonoBehaviour
{
    bool isOpen = true; //true The scanning status is currently enabled  false  Currently, the scanning status is off 

    Animator ani; // Scanning animation 

    private WebCamTexture m_webCameraTexture;// The picture displayed by the camera in real time 
    private BarcodeReader m_barcodeRender; // Apply for a variable to read the QR code 

    [Header(" Showing the camera image RawImage")]
    public RawImage m_cameraTexture;

    [Header(" Scan interval ")]
    public float m_delayTime = 3f;

    [Header(" Turn on the scan button ")]
    public Button openScanBtn;

    void Start()
    {
        // Call up the camera and display the picture on the screen RawImage On 
        WebCamDevice[] tDevices = WebCamTexture.devices;    // Get all cameras 
        string tDeviceName = tDevices[0].name;  // Get the first camera , Use the picture of the first camera to generate picture information 
        m_webCameraTexture = new WebCamTexture(tDeviceName, 400, 300);// name , wide , high 
        m_cameraTexture.texture = m_webCameraTexture;   // Assign image information 
        m_webCameraTexture.Play();  // Start real-time display 

        m_barcodeRender = new BarcodeReader();
        ani = GetComponent<Animator>();

        OpenScanQRCode(); // Default not to scan 
        // Button monitoring 
        openScanBtn.onClick.AddListener(OpenScanQRCode);
    }

    #region  Scan QR code 

    // Turn on and off scanning QR code 
    void OpenScanQRCode()
    {
        if (isOpen)
        {
            // On state , Scanning needs to be turned off 
            ani.Play("CloseScan", 0, 0);
            //CancelInvoke("CheckQRCode");
        }
        else
        {
            // The closed position , Scanning needs to be turned on 

            // Start scanning 
            ani.Play("OpenScan", 0, 0);

            // Call the method in seconds  
            //InvokeRepeating("CheckQRCode", 0, m_delayTime);
        }
        isOpen = !isOpen;
    }

    #endregion

    #region  Method of retrieving QR code 
    /// <summary>
    ///  Method of retrieving QR code 
    /// </summary>
    public void CheckQRCode()
    {
        // Store the color array of camera image information map conversion 
        Color32[] m_colorData = m_webCameraTexture.GetPixels32();

        // Retrieve the QR code information in the picture 
        var tResult = m_barcodeRender.Decode(m_colorData, m_webCameraTexture.width, m_webCameraTexture.height);

        if (tResult != null)
        {
            Application.OpenURL(tResult.Text);
            Debug.Log(tResult.Text);
        }
    }
    #endregion

}

Scene layout ：

  Here we want to record animation , It may be more troublesome , There are packages below , You can download it to have a look

5、 ... and 、 Package download

link ：https://pan.baidu.com/s/1EXpW5CUISI6Khk3dQfaeLw?pwd=syq1 
Extraction code ：syq1

unity The version is 2019.4.32