经验首页 前端设计 程序设计 Java相关 移动开发 数据库/运维 软件/图像 大数据/云计算 其他经验
当前位置：技术经验 » 软件/图像 » unity » 查看文章
Unity实现多平台二维码扫描
来源：jb51　　时间：2019/7/25 8:19:38　　对本文有异议

在unity里做扫二维码的功能，虽然有插件，但是移动端UI一般不能自定义，所以后来自已做了一个，直接在c#层扫描解析，UI上就可以自己发挥了。

上代码：

这个是调用zxing的脚本。

  1. using UnityEngine;
  2. using System.Collections;
  3. using ZXing;
  4. using ZXing.QrCode;
  5.  
  6. public class QR {
  7.   /// <summary>
  8.   /// 解析二维码
  9.   /// </summary>
  10.   /// <param name="tex"></param>
  11.   /// <returns></returns>
  12.   public static string Decode(Texture2D tex) {
  13.     return DecodeColData(tex.GetPixels32(), tex.width, tex.height); //通过reader解码 
  14.   }
  15.   public static string DecodeColData(Color32[] data, int w, int h) {
  16.     BarcodeReader reader = new BarcodeReader();
  17.     Result result = reader.Decode(data, w, h); //通过reader解码 
  18.     //GC.Collect();
  19.     if (result == null)
  20.       return "";
  21.     else {
  22.       return result.Text;
  23.     }
  24.   }
  25.   /// <summary>
  26.   /// 生成二维码
  27.   /// </summary>
  28.   /// <param name="content"></param>
  29.   /// <param name="len"></param>
  30.   /// <returns></returns>
  31.   public static Texture2D GetQRTexture(string content, int len = 256) {
  32.     var bw = new BarcodeWriter();
  33.     bw.Format = BarcodeFormat.QR_CODE;
  34.     bw.Options = new ZXing.Common.EncodingOptions() {
  35.       Height = len,
  36.       Width = len
  37.     };
  38.     var cols = bw.Write(content);
  39.     Texture2D t = new Texture2D(len, len);
  40.     t.SetPixels32(cols);
  41.     t.Apply();
  42.     return t;
  43.   }
  44. }

然后是封装：

  1. using UnityEngine;
  2. using System.Collections;
  3. using System;
  4. using UnityEngine.UI;
  5. using System.Timers;
  6. /// <summary>
  7. /// 二维码解析工具
  8. /// 关键函数:
  9. ///   public static QRHelper GetInst()                   --得到单例
  10. ///   public event Action<string> OnQRScanned;               --扫描回调
  11. ///   public void StartCamera(int index)                  --启动摄像头
  12. ///   public void StopCamera()                       --停止摄像头
  13. ///   public void SetToUI(RawImage raw,int UILayoutW,int UILayoutH)     --把摄像机画面设置到一个rawimage上并使它全屏显示
  14. /// </summary>
  15. public class QRHelper {
  16.  
  17.   public event Action<string> OnQRScanned;
  18.  
  19.   private static QRHelper _inst;
  20.   public static QRHelper GetInst() {
  21.     if (_inst == null) {
  22.       _inst = new QRHelper();
  23.     }
  24.     return _inst;
  25.   }
  26.   private int reqW = 640;
  27.   private int reqH = 480;
  28.   private WebCamTexture webcam;
  29.  
  30.   Timer timer_in, timer_out;
  31.   /// <summary>
  32.   /// 启动摄像头
  33.   /// </summary>
  34.   /// <param name="index">手机后置为0，前置为1</param>
  35.   public void StartCamera(int index) {
  36.     StopCamera();
  37.     lock (mutex) {
  38.       buffer = null;
  39.       tbuffer = null;
  40.     }
  41.     var dev = WebCamTexture.devices;
  42.     webcam = new WebCamTexture(dev[index].name);
  43.     webcam.requestedWidth = reqW;
  44.     webcam.requestedHeight = reqH;
  45.     webcam.Play();
  46.     stopAnalysis = false;
  47.  
  48.     InitTimer();
  49.     timer_in.Start();
  50.     timer_out.Start();
  51.   }
  52.   /// <summary>
  53.   /// 停止
  54.   /// </summary>
  55.   public void StopCamera() {
  56.     if (webcam!=null) {
  57.       webcam.Stop();
  58.       UnityEngine.Object.Destroy(webcam);
  59.       Resources.UnloadUnusedAssets();
  60.       webcam = null;
  61.       stopAnalysis = true;
  62.  
  63.       timer_in.Stop();
  64.       timer_out.Start();
  65.       timer_in = null;
  66.       timer_out = null;
  67.     }
  68.   }
  69.   /// <summary>
  70.   /// 把摄像机画面设置到一个rawimage上并使它全屏显示
  71.   /// </summary>
  72.   /// <param name="raw">rawimage</param>
  73.   /// <param name="UILayoutW">UI布局时的宽度</param>
  74.   /// <param name="UILayoutH">UI布局时的高度</param>
  75.   public void SetToUI(RawImage raw,int UILayoutW,int UILayoutH){
  76.     raw.GetComponent<RectTransform>().sizeDelta = GetWH(UILayoutW,UILayoutH);
  77.     int d = -1;
  78.     if (webcam.videoVerticallyMirrored) {
  79.       d = 1;
  80.     }
  81.     raw.GetComponent<RectTransform>().localRotation *= Quaternion.AngleAxis(webcam.videoRotationAngle, Vector3.back);
  82.     float scaleY = webcam.videoVerticallyMirrored ? -1.0f : 1.0f;
  83.     raw.transform.localScale = new Vector3(1, scaleY * 1, 0.0f);
  84.     raw.texture = webcam;
  85.     raw.color = Color.white;
  86.   }
  87.   //在考虑可能旋转的情况下计算UI的宽高
  88.   private Vector2 GetWH(int UILayoutW, int UILayoutH) {
  89.     int Angle = webcam.videoRotationAngle;
  90.     Vector2 init = new Vector2(reqW, reqH);
  91.     if ( Angle == 90 || Angle == 270 ) {
  92.       var tar = init.ScaleToContain(new Vector2(UILayoutH,UILayoutW));
  93.       return tar;
  94.     }
  95.     else {
  96.       var tar = init.ScaleToContain(new Vector2(UILayoutW, UILayoutH));
  97.       return tar;
  98.     }
  99.   }
  100.   private void InitTimer() {
  101.     timer_in = new Timer(500);
  102.     timer_in.AutoReset = true;
  103.     timer_in.Elapsed += (a,b) => {
  104.       ThreadWrapper.Invoke(WriteDataBuffer);
  105.     };
  106.     timer_out = new Timer(900);
  107.     timer_out.AutoReset = true;
  108.     timer_out.Elapsed += (a,b)=>{
  109.       Analysis();
  110.     };
  111.   }
  112.   private Color32[] buffer = null;
  113.   private Color32[] tbuffer = null;
  114.   private object mutex = new object();
  115.   private bool stopAnalysis = false;
  116.  
  117.   int dw, dh;
  118.   private void WriteDataBuffer() {
  119.     lock (mutex) {
  120.       if (buffer == null && webcam!=null) {
  121.         buffer = webcam.GetPixels32();
  122.         dw = webcam.width;
  123.         dh = webcam.height;
  124.       }
  125.     }
  126.   }
  127.   //解析二维码
  128.   private void Analysis() {
  129.     if (!stopAnalysis) {
  130.       lock (mutex) {
  131.         tbuffer = buffer;
  132.         buffer = null;
  133.       }
  134.       if (tbuffer == null) {
  135.         ;
  136.       }
  137.       else {
  138.         string str = QR.DecodeColData(tbuffer, dw, dh);
  139.         tbuffer = null;
  140.         if (!str.IsNullOrEmpty() && OnQRScanned != null) {
  141.           ThreadWrapper.Invoke(() => {
  142.             if (OnQRScanned!=null)
  143.               OnQRScanned(str);
  144.           });
  145.         }
  146.       }
  147.     }
  148.     tbuffer = null;
  149.   }
  150. }

调用方式如下，用了pureMVC，可能理解起来有点乱，也不能直接用于你的工程，主要看OnRegister和OnRemove里是怎么启动和停止的，以及RegQRCB、RemoveQRCB、OnQRSCcanned如何注册、移除以及响应扫描到二维码的事件的。在onregister中，由于ios上画面有镜象，所以把rawimage的scale的y置为了-1以消除镜像：

  1. using UnityEngine;
  2. using System.Collections;
  3. using System.Collections.Generic;
  4. using PureMVC.Patterns;
  5. using PureMVC.Interfaces;
  6. /// <summary>
  7. /// 扫描二维码界面逻辑
  8. /// </summary>
  9. public class ScanQRMediator : Mediator {
  10.  
  11.   AudioProxy audio;
  12.  public QRView TarView {
  13.     get {
  14.       return base.ViewComponent as QRView;
  15.     }
  16.   }
  17.   public ScanQRMediator()
  18.     : base("ScanQRMediator") {
  19.   }
  20.   string NextView = "";
  21.   bool isInitOver = false;
  22.   int cameraDelay = 1;
  23.   public override void OnRegister() {
  24.     base.OnRegister();
  25.  
  26.     if (Application.platform == RuntimePlatform.IPhonePlayer) {
  27.       cameraDelay = 5;
  28.     }
  29.     else {
  30.       cameraDelay = 15;
  31.     }
  32.  
  33.     audio = AppFacade.Inst.RetrieveProxy<AudioProxy>("AudioProxy");
  34.  
  35.     TarView.BtnBack.onClick.AddListener(BtnEscClick);
  36.     
  37.     QRHelper.GetInst().StartCamera(0);
  38.     TarView.WebcamContent.rectTransform.localEulerAngles = Vector3.zero;
  39.     CoroutineWrapper.EXEF(cameraDelay, () => {
  40.       RegQRCB();
  41.       QRHelper.GetInst().SetToUI(TarView.WebcamContent, 1536, 2048);
  42.       if (Application.platform == RuntimePlatform.IPhonePlayer) {
  43.         TarView.WebcamContent.rectTransform.localScale = new Vector3(1, -1, 0);
  44.       }
  45.       isInitOver = true;
  46.     });
  47.     UmengStatistics.PV(TarView);
  48.     //暂停背景音乐
  49.     audio.SetBGActive(false);
  50.   }
  51.  
  52.   public override void OnRemove() {
  53.     base.OnRemove();
  54.     TarView.BtnBack.onClick.RemoveListener(BtnEscClick);
  55.     if (NextView != "UnlockView") {
  56.       audio.SetBGActive(true);
  57.     }
  58.     NextView = "";
  59.     isInitOver = false;
  60.   }
  61.   bool isEsc = false;
  62.   void BtnEscClick() {
  63.     if (isEsc || !isInitOver) {
  64.       return;
  65.     }
  66.     isEsc = true;
  67.  
  68.     TarView.WebcamContent.texture = null;
  69.     TarView.WebcamContent.color = Color.black;
  70.     RemoveQRCB();
  71.     QRHelper.GetInst().StopCamera();
  72.  
  73.     CoroutineWrapper.EXEF(cameraDelay, () => {
  74.       isEsc = false;
  75.       if (Application.platform == RuntimePlatform.IPhonePlayer) {
  76.         ToUserInfoView();
  77.       }
  78.       else {
  79.         string origin = TarView.LastArg.SGet<string>("origin");
  80.         if (origin == "ARView") {
  81.           ToARView();
  82.         }
  83.         else if (origin == "UserInfoView") {
  84.           ToUserInfoView();
  85.         }
  86.         else {
  87.           ToARView();
  88.         }
  89.       }
  90.     });
  91.   }
  92.   void ToARView() {
  93.     AppFacade.Inst.RemoveMediator(this.MediatorName);
  94.     ViewMgr.GetInst().ShowView(TarView, "ARView", null);
  95.   }
  96.   void ToUserInfoView() {
  97.     AppFacade.Inst.RemoveMediator(this.MediatorName);
  98.     ViewMgr.GetInst().ShowView(TarView, "UserInfoView", null);
  99.     var v = ViewMgr.GetInst().PeekTop();
  100.     var vc = new UserInfoMediator();
  101.     vc.ViewComponent = v;
  102.     AppFacade.Inst.RegisterMediator(vc);
  103.   }
  104.   int reg = 0;
  105.   void RegQRCB() {
  106.     if (reg == 0) {
  107.       QRHelper.GetInst().OnQRScanned += OnQRScanned;
  108.       reg = 1;
  109.     }
  110.   }
  111.   void RemoveQRCB() {
  112.     if (reg == 1) {
  113.       QRHelper.GetInst().OnQRScanned -= OnQRScanned;
  114.       reg = 0;
  115.     }
  116.   }
  117.   bool isQRJump = false;
  118.   void OnQRScanned(string qrStr) {
  119.     if (isQRJump) {
  120.       return;
  121.     }
  122.     isQRJump = true;
  123.  
  124.     TarView.WebcamContent.texture = null;
  125.     TarView.WebcamContent.color = Color.black;
  126.     RemoveQRCB();
  127.     QRHelper.GetInst().StopCamera();
  128.     NextView = "UnlockView";
  129.     CoroutineWrapper.EXEF(cameraDelay, () => {
  130.       isQRJump = false;
  131.       AppFacade.Inst.RemoveMediator(this.MediatorName);
  132.       audio.PlayScanedEffect();
  133. #if YX_DEBUG
  134.       Debug.Log("qr is :"+qrStr);
  135.       Toast.ShowText(qrStr,1.5f);
  136. #endif
  137.       ViewMgr.GetInst().ShowView(TarView, "UnlockView", HashtableEX.Construct("QRCode", qrStr, "origin", TarView.LastArg.SGet<string>("origin")));
  138.       var v = ViewMgr.GetInst().PeekTop();
  139.       var vc = new UnlockMediator();
  140.       vc.ViewComponent = v;
  141.       AppFacade.Inst.RegisterMediator(vc);
  142.     });
  143.   }
  144. }

最后，放上zxing.unity.dll,放在plugins里就可以了。

以上代码5.1.2测试可用。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持w3xue。

 友情链接：直通硅谷 　点职佳 　北美留学生论坛

unity热门文章

  • Unity3D 计时器的实现代码(三种写法总结)
  • unity AudioSource播放完声音后要执行的函数或条件操作
  • Unity 实现给物体替换材质球
  • unity中camera摄像头控制详解
  • 欧拉角的万向节死锁问题
  • 原生实现C#与Lua相互调用方法(Unity3D可用)
  • unity 实现摄像机绕某点旋转一周
  • Unity Shader实现模糊效果
  • 基于Unity实现2D边缘检测
  • C#使用Unity实现IOC

    • unity推荐文章

  • [Unity] Dreamteck Splines实现沿路径移动功能
  • [Unity] 实现AssetBundle资源加载管理器
  • 扩展实现Unity协程的完整栈跟踪
  • iOS使用Unity容器动态加载3D模型
  • 【Unity3D】Unity与Android交互
  • Unity学习笔记--数据持久化之PlayerPrefs的使用
  • 循序渐进介绍基于CommunityToolkit.Mvvm 和HandyControl的WPF应用端开发(12) -- 使用代码生成工具Database2Sharp生成WPF界面代码
  • 循序渐进介绍基于CommunityToolkit.Mvvm 和HandyControl的WPF应用端开发(11) -- 下拉列表的数据绑定以及自定义系统字典列表控件
  • 【Unity3D】UI Toolkit样式选择器
  • 【Unity3D】UI Toolkit容器

    • 本站QQ群：前端 618073944 | Java 606181507 | Python 626812652 | C/C++ 612253063 | 微信 634508462 | 苹果 692586424 | C#/.net 182808419 | PHP 305140648 | 运维 608723728

    W3xue 的所有内容仅供测试，对任何法律问题及风险不承担任何责任。通过使用本站内容随之而来的风险与本站无关。
    关于我们  |  意见建议  |  捐助我们  |  报错有奖  |  广告合作、友情链接（目前9元/月）请联系QQ：27243702 沸活量
    皖ICP备17017327号-2　皖公网安备34020702000426号