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。

using UnityEngine;using System.Collections;using ZXing;using ZXing.QrCode; public class QR { /// <summary> /// 解析二维码 /// </summary> /// <param name="tex"></param> /// <returns></returns> public static string Decode(Texture2D tex) { return DecodeColData(tex.GetPixels32(), tex.width, tex.height); //通过reader解码 } public static string DecodeColData(Color32[] data, int w, int h) { BarcodeReader reader = new BarcodeReader(); Result result = reader.Decode(data, w, h); //通过reader解码 //GC.Collect(); if (result == null) return ""; else { return result.Text; } } /// <summary> /// 生成二维码 /// </summary> /// <param name="content"></param> /// <param name="len"></param> /// <returns></returns> public static Texture2D GetQRTexture(string content, int len = 256) { var bw = new BarcodeWriter(); bw.Format = BarcodeFormat.QR_CODE; bw.Options = new ZXing.Common.EncodingOptions() { Height = len, Width = len }; var cols = bw.Write(content); Texture2D t = new Texture2D(len, len); t.SetPixels32(cols); t.Apply(); return t; }}

然后是封装：

using UnityEngine;using System.Collections;using System;using UnityEngine.UI;using System.Timers;/// <summary>/// 二维码解析工具/// 关键函数:/// public static QRHelper GetInst() --得到单例/// public event Action<string> OnQRScanned; --扫描回调/// public void StartCamera(int index) --启动摄像头/// public void StopCamera() --停止摄像头/// 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/// </summary>public class QRHelper { public event Action<string> OnQRScanned; private static QRHelper _inst; public static QRHelper GetInst() { if (_inst == null) { _inst = new QRHelper(); } return _inst; } private int reqW = 640; private int reqH = 480; private WebCamTexture webcam; Timer timer_in, timer_out; /// <summary> /// 启动摄像头 /// </summary> /// <param name="index">手机后置为0，前置为1</param> public void StartCamera(int index) { StopCamera(); lock (mutex) { buffer = null; tbuffer = null; } var dev = WebCamTexture.devices; webcam = new WebCamTexture(dev[index].name); webcam.requestedWidth = reqW; webcam.requestedHeight = reqH; webcam.Play(); stopAnalysis = false; InitTimer(); timer_in.Start(); timer_out.Start(); } /// <summary> /// 停止 /// </summary> public void StopCamera() { if (webcam!=null) { webcam.Stop(); UnityEngine.Object.Destroy(webcam); Resources.UnloadUnusedAssets(); webcam = null; stopAnalysis = true; timer_in.Stop(); timer_out.Start(); timer_in = null; timer_out = null; } } /// <summary> /// 把摄像机画面设置到一个rawimage上并使它全屏显示 /// </summary> /// <param name="raw">rawimage</param> /// <param name="UILayoutW">UI布局时的宽度</param> /// <param name="UILayoutH">UI布局时的高度</param> public void SetToUI(RawImage raw,int UILayoutW,int UILayoutH){ raw.GetComponent<RectTransform>().sizeDelta = GetWH(UILayoutW,UILayoutH); int d = -1; if (webcam.videoVerticallyMirrored) { d = 1; } raw.GetComponent<RectTransform>().localRotation *= Quaternion.AngleAxis(webcam.videoRotationAngle, Vector3.back); float scaleY = webcam.videoVerticallyMirrored ? -1.0f : 1.0f; raw.transform.localScale = new Vector3(1, scaleY * 1, 0.0f); raw.texture = webcam; raw.color = Color.white; } //在考虑可能旋转的情况下计算UI的宽高 private Vector2 GetWH(int UILayoutW, int UILayoutH) { int Angle = webcam.videoRotationAngle; Vector2 init = new Vector2(reqW, reqH); if ( Angle == 90 || Angle == 270 ) { var tar = init.ScaleToContain(new Vector2(UILayoutH,UILayoutW)); return tar; } else { var tar = init.ScaleToContain(new Vector2(UILayoutW, UILayoutH)); return tar; } } private void InitTimer() { timer_in = new Timer(500); timer_in.AutoReset = true; timer_in.Elapsed += (a,b) => { ThreadWrapper.Invoke(WriteDataBuffer); }; timer_out = new Timer(900); timer_out.AutoReset = true; timer_out.Elapsed += (a,b)=>{ Analysis(); }; } private Color32[] buffer = null; private Color32[] tbuffer = null; private object mutex = new object(); private bool stopAnalysis = false; int dw, dh; private void WriteDataBuffer() { lock (mutex) { if (buffer == null && webcam!=null) { buffer = webcam.GetPixels32(); dw = webcam.width; dh = webcam.height; } } } //解析二维码 private void Analysis() { if (!stopAnalysis) { lock (mutex) { tbuffer = buffer; buffer = null; } if (tbuffer == null) { ; } else { string str = QR.DecodeColData(tbuffer, dw, dh); tbuffer = null; if (!str.IsNullOrEmpty() && OnQRScanned != null) { ThreadWrapper.Invoke(() => { if (OnQRScanned!=null) OnQRScanned(str); }); } } } tbuffer = null; }}

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：

using UnityEngine;using System.Collections;using System.Collections.Generic;using PureMVC.Patterns;using PureMVC.Interfaces;/// <summary>/// 扫描二维码界面逻辑/// </summary>public class ScanQRMediator : Mediator { AudioProxy audio; public QRView TarView { get { return base.ViewComponent as QRView; } } public ScanQRMediator() : base("ScanQRMediator") { } string NextView = ""; bool isInitOver = false; int cameraDelay = 1; public override void OnRegister() { base.OnRegister(); if (Application.platform == RuntimePlatform.IPhonePlayer) { cameraDelay = 5; } else { cameraDelay = 15; } audio = AppFacade.Inst.RetrieveProxy<AudioProxy>("AudioProxy"); TarView.BtnBack.onClick.AddListener(BtnEscClick); QRHelper.GetInst().StartCamera(0); TarView.WebcamContent.rectTransform.localEulerAngles = Vector3.zero; CoroutineWrapper.EXEF(cameraDelay, () => { RegQRCB(); QRHelper.GetInst().SetToUI(TarView.WebcamContent, 1536, 2048); if (Application.platform == RuntimePlatform.IPhonePlayer) { TarView.WebcamContent.rectTransform.localScale = new Vector3(1, -1, 0); } isInitOver = true; }); UmengStatistics.PV(TarView); //暂停背景音乐 audio.SetBGActive(false); } public override void OnRemove() { base.OnRemove(); TarView.BtnBack.onClick.RemoveListener(BtnEscClick); if (NextView != "UnlockView") { audio.SetBGActive(true); } NextView = ""; isInitOver = false; } bool isEsc = false; void BtnEscClick() { if (isEsc || !isInitOver) { return; } isEsc = true; TarView.WebcamContent.texture = null; TarView.WebcamContent.color = Color.black; RemoveQRCB(); QRHelper.GetInst().StopCamera(); CoroutineWrapper.EXEF(cameraDelay, () => { isEsc = false; if (Application.platform == RuntimePlatform.IPhonePlayer) { ToUserInfoView(); } else { string origin = TarView.LastArg.SGet<string>("origin"); if (origin == "ARView") { ToARView(); } else if (origin == "UserInfoView") { ToUserInfoView(); } else { ToARView(); } } }); } void ToARView() { AppFacade.Inst.RemoveMediator(this.MediatorName); ViewMgr.GetInst().ShowView(TarView, "ARView", null); } void ToUserInfoView() { AppFacade.Inst.RemoveMediator(this.MediatorName); ViewMgr.GetInst().ShowView(TarView, "UserInfoView", null); var v = ViewMgr.GetInst().PeekTop(); var vc = new UserInfoMediator(); vc.ViewComponent = v; AppFacade.Inst.RegisterMediator(vc); } int reg = 0; void RegQRCB() { if (reg == 0) { QRHelper.GetInst().OnQRScanned += OnQRScanned; reg = 1; } } void RemoveQRCB() { if (reg == 1) { QRHelper.GetInst().OnQRScanned -= OnQRScanned; reg = 0; } } bool isQRJump = false; void OnQRScanned(string qrStr) { if (isQRJump) { return; } isQRJump = true; TarView.WebcamContent.texture = null; TarView.WebcamContent.color = Color.black; RemoveQRCB(); QRHelper.GetInst().StopCamera(); NextView = "UnlockView"; CoroutineWrapper.EXEF(cameraDelay, () => { isQRJump = false; AppFacade.Inst.RemoveMediator(this.MediatorName); audio.PlayScanedEffect();#if YX_DEBUG Debug.Log("qr is :"+qrStr); Toast.ShowText(qrStr,1.5f);#endif ViewMgr.GetInst().ShowView(TarView, "UnlockView", HashtableEX.Construct("QRCode", qrStr, "origin", TarView.LastArg.SGet<string>("origin"))); var v = ViewMgr.GetInst().PeekTop(); var vc = new UnlockMediator(); vc.ViewComponent = v; AppFacade.Inst.RegisterMediator(vc); }); }}

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。