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unity 生成和识别二维码

文章目录

    • 方案一·:
      • 1.识别
      • 2.生成
    • 实例

需要用到ZXing.dll
ZXing:地址: https://archive.codeplex.com/?p=zxingnet

方案一·:

1.识别

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ZXing;
using UnityEngine.UI;
/// <summary>
/// 二维码扫描识别功能
/// </summary>
public class TestQRCodeScanning : MonoBehaviour {
 
 [Header("摄像机检测界面")]
 public RawImage cameraTexture;//摄像机映射显示区域
 
 private WebCamTexture webCamTexture;//摄像机映射纹理
 public Text text;//用来显示扫描信息
 //二维码识别类
 BarcodeReader barcodeReader;//库文件的对象(二维码信息保存的地方)
 
 /// <summary>
 /// 开启摄像机和准备工作
 /// </summary>
 void DeviceInit()
 {
  //1、获取所有摄像机硬件
  WebCamDevice[] devices = WebCamTexture.devices;
  //2、获取第一个摄像机硬件的名称
  string deviceName = devices[0].name;//手机后置摄像机
  //3、创建实例化一个摄像机显示区域
  webCamTexture = new WebCamTexture(deviceName, 400, 300);
  //4、显示的图片信息
  cameraTexture.texture = webCamTexture;
  //5、打开摄像机运行识别
  webCamTexture.Play();
 
  //6、实例化识别二维码信息存储对象
  barcodeReader = new BarcodeReader();
 }
 
 Color32[] data;//二维码图片信息以像素点颜色信息数组存放
 
 /// <summary>
 /// 识别摄像机图片中的二维码信息
 /// 打印二维码识别到的信息
 /// </summary>
 void ScanQRCode()
 {
  //7、获取摄像机画面的像素颜色数组信息
  data = webCamTexture.GetPixels32();
  //8、获取图片中的二维码信息
  Result result = barcodeReader.Decode(data,webCamTexture.width,webCamTexture.height);
  //如果获取到二维码信息了,打印出来
  if (result!=null)
  {
   Debug.Log(result.Text);//===》==》===》 这是从二维码识别出来的信息
   text.text = result.Text;//显示扫描信息
 
   扫描成功之后的处理:停止识别关闭相机
   //IsScanning = false;
   //webCamTexture.Stop();
  }
 }
 
 
 /// <summary>
 /// Start 初始化函数
 /// </summary>
 private void Start()
 {
  scanningButton.onClick.AddListener(ScanningButtonClick);
 }
 
 
 bool IsScanning = false;
 float interval = 3;//扫描识别时间间隔
 [SerializeField] Button scanningButton;
 void ScanningButtonClick()
 {
  DeviceInit();
  IsScanning = true;
 }
 
 private void Update()
 {
  if (IsScanning)
  {
   //每隔一段时间进行一次识别二维码信息
   interval += Time.deltaTime;
   if (interval>=3)
   {
    interval = 0;
    ScanQRCode();//开始扫描
   }
  }
 }
}

2.生成

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ZXing;
//二维码的生成
public class TestQRCodeDraw : MonoBehaviour {
 
 [Header("绘制好的二维码显示界面")]
 public RawImage QRCode;
 //二维码绘制类
 BarcodeWriter barcodeWriter;
 [SerializeField] Button drawbutton;
 /// <summary>
 /// 将制定字符串信息转换成二维码图片信息
 /// </summary>
 /// <param name="formatStr">要生产二维码的字符串信息</param>
 /// <param name="width">二维码的宽度</param>
 /// <param name="height">二维码的高度</param>
 /// <returns>返回二维码图片的颜色数组信息</returns>
 Color32[] GeneQRCode(string formatStr,int width,int height)
 {
  //绘制二维码前进行一些设置
  ZXing.QrCode.QrCodeEncodingOptions options =
   new ZXing.QrCode.QrCodeEncodingOptions();
  //设置字符串转换格式,确保字符串信息保持正确
  options.CharacterSet = "UTF-8";
  //设置绘制区域的宽度和高度的像素值
  options.Width = width;
  options.Height = height;
  //设置二维码边缘留白宽度(值越大留白宽度大,二维码就减小)
  options.Margin = 1;
 
  //实例化字符串绘制二维码工具
  barcodeWriter = new BarcodeWriter {Format=BarcodeFormat.QR_CODE,Options=options };
  //进行二维码绘制并进行返回图片的颜色数组信息
  return barcodeWriter.Write(formatStr); 
 
 }
 
 /// <summary>
 /// 根据二维码图片信息绘制指定字符串信息的二维码到指定区域
 /// </summary>
 /// <param name="str">要生产二维码的字符串信息</param>
 /// <param name="width">二维码的宽度</param>
 /// <param name="height">二维码的高度</param>
 /// <returns>返回绘制好的图片</returns>
  Texture2D ShowQRCode(string str,int width,int height)
 {
  //实例化一个图片类
  Texture2D t = new Texture2D(width, height);
  //获取二维码图片颜色数组信息
  Color32[] col32 = GeneQRCode(str, width, height);
  //为图片设置绘制像素颜色信息
  t.SetPixels32(col32);
  //设置信息更新应用下
  t.Apply();
  //将整理好的图片信息显示到指定区域中
  return t;
 }
 
 /// <summary>
 /// 开始绘制指定信息的二维码
 /// </summary>
 /// <param name="formatStr"></param>
 void DrawQRCode(string formatStr)
 {
  //注意:这个宽高度大小256不要变。不然生成的信息不正确
  //256有可能是这个ZXingNet插件指定大小的绘制像素点数值
  Texture2D t = ShowQRCode(formatStr, 256, 256);
 
  //显示到UI界面的图片上
  QRCode.texture = t;
 }
 
 
 public string QRCodeText = "二维码";
 void DrawButtonClick()
 {
  DrawQRCode(QRCodeText);
 }
 
 private void Start()
 {
  drawbutton.onClick.AddListener(DrawButtonClick);
 }
}

实例

识别二维码
脚本

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

public class QRCode : MonoBehaviour
{
    public string LastResult;
    public string CameraName;

    public RawImage MyCameraTexture;
    public int CameraIndex = 0;
    public int CameraRequestedWidth = 1920;
    public int CameraRequestedHeight = 1080;
    public float ReadTime = 0.5f;

    private Color32[] Data;
    private WebCamTexture WebCameraTexture;
    private bool IsStart = false;

    //public RenderTexture QRRenderTexture;


    private void Start()
    {
        //开启摄像头
        StartCoroutine(CallCamera());
    }
    
    //调用摄像头
    IEnumerator CallCamera()
    {
        //请求摄像头权限
        yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);

        //是否取得使用摄像头权限
        if (Application.HasUserAuthorization(UserAuthorization.WebCam))
        {
            //得到可用设备列表
            WebCamDevice[] devices = WebCamTexture.devices;

            //判断输入的CameraIndex是否合法
            if (CameraIndex < 0)
            {
                Debug.LogError("CameraIndex 不可为负数");
                yield break;
            }

            if (devices.Length <= CameraIndex)
            {
                Debug.LogError("Do not find Camera!");
            }
            else
            {
                CameraName = devices[CameraIndex].name;
                WebCameraTexture = new WebCamTexture(devices[0].name, CameraRequestedWidth, CameraRequestedHeight, 25);
                MyCameraTexture.texture = WebCameraTexture;
                WebCameraTexture.Play(); //开始摄像 

                IsStart = true;
                print(IsStart = true);
                
                CameraRequestedWidth = WebCameraTexture.width;
                CameraRequestedHeight = WebCameraTexture.height;
            }
        }
        else
        {
            Debug.LogError("未获得系统授权!");
        }
    }

    //开始调用摄像头
    public void ShowCamera()
    {
        MyCameraTexture.enabled = true;
        WebCameraTexture.Play();
    }

    //停止摄像头调用
    public void HideCamera()
    {
        MyCameraTexture.enabled = false;
        WebCameraTexture.Stop();
    }

    private void OnGUI()
    {
        GUI.Label(new Rect(260, 30, Screen.width, 20), "LastResult:" + LastResult);
        if (GUI.Button(new Rect(0, 0, 200, 80), "Camera ON/OFF"))
        {
            if (WebCameraTexture.isPlaying)
                HideCamera();
            else
                ShowCamera();
        }
    }

    private void Update()
    {
        if (IsStart && MyCameraTexture.enabled)
        {
            Data = WebCameraTexture.GetPixels32();
            //StartCoroutine(DecodeQR(WebCameraTexture.width, WebCameraTexture.height));
            Thread t = new Thread(DecodeQR);
            t.Start();
            t.IsBackground = true;
        }
    }

    private void DecodeQR()
    {
        //Debug.Log("DecodeQR()");
        IsStart = false;

        // 创建二维码读写器
        var barcodeReader = new BarcodeReader { AutoRotate = true, TryHarder = true };

        try
        {
            //Debug.Log("解");
            // 对当前帧解码
            Result result = barcodeReader.Decode(Data, CameraRequestedWidth, CameraRequestedHeight);
            if (result != null)
            {
                LastResult = result.Text;
                print("Read out:" + result.Text);
            }
            else
            {
                print("没有数据");
            }
            Data = null;
        }
        catch(Exception e)
        {
            Debug.LogError(e);
        }

        // 设置睡眠时间
        Thread.Sleep((int)(ReadTime * 1000));

        IsStart = true;
    }
}

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