二维码的生成<一>

using UnityEngine;
using System.Collections;
using ZXing;
using ZXing.QrCode;
using System;
using System.IO;
public class BarcodeCam : MonoBehaviour
{
    public Texture2D encoded;//生成的二维码为Texture2D类型  
    public string Lastresult;//二维码中所包含的内容信息，我是使用了GUID进行代替  
    public int count = 5;//生成几个二维码  
    void Start()
    {

        encoded = new Texture2D(256, 256);
        for (int i = 0; i < count; i++)
        {
            Guid idKey = Guid.NewGuid();  
            Lastresult = idKey.ToString();  //二维码中所包含的内容信息
            var textForEncoding = Lastresult;
            if (textForEncoding != null)
            {
                var color32 = Encode(textForEncoding, encoded.width, encoded.height);
                encoded.SetPixels32(color32);
                encoded.Apply();
                byte[] bytes = encoded.EncodeToPNG();//把二维码转成byte数组，然后进行输出保存为png图片就可以保存下来生成好的二维码  
                if (!Directory.Exists(Application.dataPath + "/Texture2DFolder"))//创建生成目录，如果不存在则创建目录  
                {
                    Directory.CreateDirectory(Application.dataPath + "/Texture2DFolder");
                }
                string fileName = Application.dataPath + "/Texture2DFolder/" + idKey + ".png";
                System.IO.File.WriteAllBytes(fileName, bytes);
            }
        }
    }


    private static Color32[] Encode(string textForEncoding, int width, int height)    
    {
        var writer = new BarcodeWriter
        {
            Format = BarcodeFormat.QR_CODE,
            Options = new QrCodeEncodingOptions
            {
                Height = height,
                Width = width
            }
        };
        return writer.Write(textForEncoding);
    }

    void OnGUI()
    {
        GUI.DrawTexture(new Rect(100, 100, 256, 256), encoded);
    }

}

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

public class BarcodeCam1 : MonoBehaviour
{

    public Texture2D encoded;
    public RawImage camsx;   //UI上用于显示摄像头显示的内容；
    public Text rsText;     //ZXing解析的结果
    //private string TestStr;   //网络返回的验证数据结果
    private int sw, sh;
    public static string driverID;  //设备唯一标识

    //代表着摄像机;
    private WebCamTexture camTexture;
    private Thread qrThread;

    private Color32[] c;
    private int cw, ch;
    private Rect screenRect;
    private bool isQuit;

    public string LastResult;
    private string QRScan;
    private bool shouldEncodNow;
    void OnGUI()
    {
        GUI.Label(screenRect,driverID);
    }
    void OnEnable()
    {
        if (camTexture != null)
        {
            camTexture.Play();
            cw = camTexture.width;
            ch = camTexture.height;
        }
    }
    void OnDisable()
    {
        if (camTexture != null)
        {
            camTexture.Pause();
        }
    }
    void OnDestroy()
    {
        qrThread.Abort();
        camTexture.Stop();
    }
    void OnApplicationQuit()
    {
        isQuit = true;
    }
    void Start()
    {
        driverID = SystemInfo.deviceUniqueIdentifier; //设备唯一性
        encoded = new Texture2D(256,256);
        LastResult = "WWW.baidu.com";
        shouldEncodNow = false;
        screenRect = new Rect(0,0,Screen.width,Screen.height);
        camTexture = new WebCamTexture();
        if (Screen.width < 1280)
        {
            sw = 640;
        }
        else {
            sw = 1280;
        }

        //在unity界面上显示扫描的内容;
        camTexture.requestedHeight = 720;
        camTexture.requestedWidth = sw;
        camsx.texture = camTexture;
        camsx.material.mainTexture = camTexture;
        OnEnable();

        qrThread = new Thread(DecodeQR);
        qrThread.Start();
    }
    void Update()
    {
        if (c == null & (camTexture.isPlaying))
        {
            c = camTexture.GetPixels32();
            cw = camTexture.width;
            ch = camTexture.height;
        }
        rsText.text = LastResult;
        camsx.enabled = false;

        camsx.enabled = true;
        var textForEncoding = LastResult;
        if (shouldEncodNow && textForEncoding != null)
        {
            var color32 = Encode(textForEncoding,encoded.width,encoded.height);
            encoded.SetPixels32(color32);
            encoded.Apply();
            shouldEncodNow = false;
            if (QRScan != LastResult)
            {
                QRScan = LastResult;
                //to do 如果遇到新的二维码那么就执行其他的操作（如：网络请求验证）
                //StartCoroutine(CheckCode(LastResult));
            }
        }
    }
    //解码扫描的内容
    void DecodeQR()
    {
        var barcodeReader = new BarcodeReader { AutoRotate = false, TryHarder = false };
        while (true)
        {
            if (isQuit) break;
            try
            {
                if (c != null)
                {
                    var result = barcodeReader.Decode(c, cw, ch);
                    if (result != null)
                    {
                        LastResult = result.Text;
                        shouldEncodNow = true;
                    }
                    Thread.Sleep(200);
                    c = null;
                }
            }
            catch { }
        }
    }
    private static Color32[] Encode(string textForEncoding, int width, int height)
    {
        var writer = new BarcodeWriter
        {
            Format = BarcodeFormat.QR_CODE,
            Options = new QrCodeEncodingOptions
            {
                Height = height,
                Width = width
            }
        };
        return writer.Write(textForEncoding);
     }
}