Unity插件系列之二维码

2022-12-07 12:07:35

1.二维码常见的生成与识别途径

1.草料二维码 https://cli.im/text

2.在软件中实现生成和扫描二维码使用zxing实现

zxing是一个用java写的开源项目，zxing.net是移植到.net工程上的。

https://github.com/micjahn/ZXing.Net

2.实现二维码的识别

1.Unity工程

2.让RawImage显示摄像头内容

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using ZXing;

using UnityEngine.UI;

public class QRCodeTest : MonoBehaviour {

    public RawImage cameraTexture;

    private WebCamTexture webCamTexture;

	// Use this for initialization

	void Start () {

        WebCamDevice[] devices = WebCamTexture.devices;

        string deviceName = devices[0].name;

        webCamTexture = new WebCamTexture(deviceName, 400, 300);

        cameraTexture.texture = webCamTexture;

        webCamTexture.Play();

	}

	// Update is called once per frame

	void Update () {

	}

}

3.扫描功能实现代码（代码有点长，慢慢看）

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using ZXing;

using UnityEngine.UI;

public class QRCodeTest : MonoBehaviour {

    public RawImage cameraTexture;//存储摄像头拍到的内容

    private WebCamTexture webCamTexture;//摄像头的内容

    Color32[] data;

    BarcodeReader barcodeReader;//Zxing提供的读取摄像头内容的方法

    float interval = 0f;//做定时器用

	// Use this for initialization

	void Start () {

        //打开了摄像头

        WebCamDevice[] devices = WebCamTexture.devices;

        string deviceName = devices[0].name;

        webCamTexture = new WebCamTexture(deviceName, 400, 300);

        cameraTexture.texture = webCamTexture;

        webCamTexture.Play();

        barcodeReader = new BarcodeReader();

	}

	// Update is called once per frame

	void Update () {

        interval += Time.deltaTime;

        if (interval >= 3f) {

            ScanQRCode();

            interval = 0f;

        }

	}

    void ScanQRCode()

    {

        //GetPixels32是把格式转换为Color32的方法

        data = webCamTexture.GetPixels32();

        //result存储读取的内容

        var result = barcodeReader.Decode(data, webCamTexture.width, webCamTexture.height);

        if (result != null) {

            Debug.Log(result.Text);

        }

    }

}

3.实现二维码的生成 (注：我关掉网络也能成功识别生成的二维码，说明这东西是离线的)

1.新建一个RawImage存储生成的识别图

2.添加了生成二维码的方法：

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using ZXing;

using UnityEngine.UI;

public class QRCodeTest : MonoBehaviour {

    public RawImage cameraTexture;//存储摄像头拍到的内容

    public RawImage QRCode;//存储生成的二维码

    private WebCamTexture webCamTexture;//摄像头的内容

    Color32[] data;

    BarcodeReader barcodeReader;//Zxing提供的读取摄像头内容的方法

    BarcodeWriter barcodeWriter;//Zxing提供的写内容的方法

    float interval = 0f;//做定时器用

	// Use this for initialization

	void Start () {

        //打开了摄像头

        WebCamDevice[] devices = WebCamTexture.devices;

        string deviceName = devices[0].name;

        webCamTexture = new WebCamTexture(deviceName, 400, 300);

        cameraTexture.texture = webCamTexture;

        webCamTexture.Play();

        barcodeReader = new BarcodeReader();

	}

	// Update is called once per frame

	void Update () {

        interval += Time.deltaTime;

        if (interval >= 3f) {

            ScanQRCode();

            interval = 0f;

        }

        //按下空格键生成二维码

        if (Input.GetKeyDown(KeyCode.Space))

        {

            //在这种写法里 只能填入256

            ShowQRCode("我爱学习", 256, 256);

            //如果想要其他大小的二维码呢？见文章底部链接

        }

	}

    //扫描二维码方法

    void ScanQRCode()

    {

        //GetPixels32是从一张图片上获取颜色的方法

        data = webCamTexture.GetPixels32();

        //result存储读取的内容

        var result = barcodeReader.Decode(data, webCamTexture.width, webCamTexture.height);

        if (result != null) {

            Debug.Log(result.Text);

        }

    }

    //显示生成的二维码

    void ShowQRCode(string str,int width,int height) {

        //定义texture2d并且填充

        Texture2D t = new Texture2D(width, height);

        t.SetPixels32(GeneQRCode(str, width, height));

        t.Apply();

        QRCode.texture = t;

    }

    //返回Color32图片颜色的方法

    Color32[] GeneQRCode(string formatStr,int width,int height) {

        ZXing.QrCode.QrCodeEncodingOptions options = new ZXing.QrCode.QrCodeEncodingOptions();

        options.CharacterSet = "UTF-8";//设置字符编码，否则中文不能显示

        options.Width = width;

        options.Height = width;

        options.Margin = 1;//二维码距离边缘的空白

        barcodeWriter = new BarcodeWriter { Format = ZXing.BarcodeFormat.QR_CODE, Options = options };

        return barcodeWriter.Write(formatStr);

    }

}

ZXing 二维码生成的坑 http://blog.sina.com.cn/s/blog_6ad33d350102xj8l.html

zxing.net读取和保存二维码，设置中文字符集，读取中文二维码 https://bbs.csdn.net/topics/391950715?page=1

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