使用Unity扫描场景内的二维码，使用插件ZXing

使用Unity扫描场景内的二维码，ZXing可能没有提供场景内扫描的方法，只有调用真实摄像机扫描二维码的方法。
实现的原理是：在摄像机上添加脚本，发射射线，当射线打到rawimage的时候获取rawimage的texture并作为二维码扫描。
支持webgl，windows。

代码

生成二维码，需要有zxing.unity.dll

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ZXing.Common;
using ZXing;/// <summary>
/// 生成二维码
/// </summary>
public class GenerateQRCode : MonoBehaviour
{public RawImage rawImage;void Start(){//整数倍变化256*NrawImage.texture = GenerateQRImageWithColor("hello word!", 256 * 3, Color.black);}/// <summary>/// 生成二维码 /// </summary>/// <param name="content">二维码内容</param>/// <param name="widthAndTall">宽度高度和宽度</param>/// <param name="color">二维码颜色</param>public Texture2D GenerateQRImageWithColor(string content, int widthAndTall, Color color){BitMatrix bitMatrix;Texture2D texture = GenerateQRImageWithColor(content, widthAndTall, widthAndTall, color, out bitMatrix);return texture;}/// <summary>/// 生成2维码 方法二/// 经测试：能生成任意尺寸的正方形/// </summary>/// <param name="content"></param>/// <param name="width"></param>/// <param name="height"></param>Texture2D GenerateQRImageWithColor(string content, int width, int height, Color color, out BitMatrix bitMatrix){// 编码成color32MultiFormatWriter writer = new MultiFormatWriter();Dictionary<EncodeHintType, object> hints = new Dictionary<EncodeHintType, object>();//设置字符串转换格式，确保字符串信息保持正确hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");// 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）hints.Add(EncodeHintType.MARGIN, 1);hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.M);//实例化字符串绘制二维码工具bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 转成texture2dint w = bitMatrix.Width;int h = bitMatrix.Height;print(string.Format("w={0},h={1}", w, h));Texture2D texture = new Texture2D(w, h);for (int x = 0; x < h; x++){for (int y = 0; y < w; y++){if (bitMatrix[x, y]){texture.SetPixel(y, x, color);}else{texture.SetPixel(y, x, Color.white);}}}texture.Apply();return texture;}/// <summary>/// 生成2维码 方法三/// 在方法二的基础上，添加小图标/// </summary>/// <param name="content"></param>/// <param name="width"></param>/// <param name="height"></param>/// <returns></returns>Texture2D GenerateQRImageWithColorAndIcon(string content, int width, int height, Color color, Texture2D centerIcon){BitMatrix bitMatrix;Texture2D texture = GenerateQRImageWithColor(content, width, height, color, out bitMatrix);int w = bitMatrix.Width;int h = bitMatrix.Height;// 添加小图int halfWidth = texture.width / 2;int halfHeight = texture.height / 2;int halfWidthOfIcon = centerIcon.width / 2;int halfHeightOfIcon = centerIcon.height / 2;int centerOffsetX = 0;int centerOffsetY = 0;for (int x = 0; x < h; x++){for (int y = 0; y < w; y++){centerOffsetX = x - halfWidth;centerOffsetY = y - halfHeight;if (Mathf.Abs(centerOffsetX) <= halfWidthOfIcon && Mathf.Abs(centerOffsetY) <= halfHeightOfIcon){texture.SetPixel(x, y,centerIcon.GetPixel(centerOffsetX + halfWidthOfIcon, centerOffsetY + halfHeightOfIcon));}}}texture.Apply();// 存储成文件byte[] bytes = texture.EncodeToPNG();string path = System.IO.Path.Combine(Application.dataPath, "qr.png");System.IO.File.WriteAllBytes(path, bytes);return texture;}
}

扫描二维码

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using ZXing;/// <summary>
/// 扫描二维码
/// </summary>
public class ScanQRCode : MonoBehaviour
{public Camera customCamera;public UnityEngine.UI.Text showText;public UnityEngine.UI.Button btnStartScan;public LayerMask layerMask; // 需要检测的图层public float rayLength = 5f; // 射线长度void Start(){btnStartScan.onClick.AddListener(OnStartScamOnClick);}private void OnStartScamOnClick(){// 发射一条射线从指定摄像机的屏幕中心Ray ray = customCamera.ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2, 0));// 使用 EventSystem 进行 UI 射线检测PointerEventData pointerEventData = new PointerEventData(EventSystem.current);pointerEventData.position = new Vector2(Screen.width / 2, Screen.height / 2);List<RaycastResult> results = new RaycastResult[1].ToList();EventSystem.current.RaycastAll(pointerEventData, results);// 如果检测到了UI元素if (results.Count > 0){// 返回UI元素的名称Debug.Log("Hit UI object: " + results[0].gameObject.name);string imgo = GetColorImage(results[0].gameObject);showText.text= imgo;}else{// 如果没有检测到UI元素，则进行3D场景中的射线检测RaycastHit hitInfo;if (Physics.Raycast(ray, out hitInfo, rayLength)){// 返回击中物体的名称Debug.Log("Hit object: " + hitInfo.collider.gameObject.name);}}}private string GetColorImage(GameObject go){RawImage rawImage;if (!go.TryGetComponent<RawImage>(out rawImage)){return "";}Texture2D texture = rawImage.texture as Texture2D;try{// 创建二维码解码器IBarcodeReader barcodeReader = new BarcodeReader();// 解码纹理中的二维码Result result = barcodeReader.Decode(texture.GetPixels32(), texture.width, texture.height);// 返回解码结果return result != null ? result.Text : null;}catch (System.Exception ex){showText.text = ("Error scanning QR code: " + ex.Message);Debug.LogError("Error scanning QR code: " + ex.Message);return null;}}}

场景布置

下载

可以私信下载
https://download.csdn.net/download/GoodCooking/89208272