二维码生成

从vs Nugets搜索ThoughtWorks.QRCode下载ThoughtWorks.QRCode.dll

    private byte[] CreateQrcode(string code)
    {    
        string enCodeString = code;
        QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
        qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
        qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;
        qrCodeEncoder.QRCodeScale = 3;
        qrCodeEncoder.QRCodeVersion = 8;
        Bitmap bitmap = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);
        //string filename = "QrCode.jpg";
        //bt.Save(filename);

        using (MemoryStream stream = new MemoryStream())
        {
            bitmap.Save(stream, ImageFormat.Jpeg);
            byte[] data = new byte[stream.Length];
            stream.Seek(0, SeekOrigin.Begin);
            stream.Read(data, 0, Convert.ToInt32(stream.Length));
            return data;
        }
    }

 上述二维码工具不适用与移动端，移动端可使用zxing插件

代码如下

    public void ShowCode(string qrCode)
    {
        Texture2D qrCodeTex = new Texture2D(256, 256);

        if (qrCode != null)
        {
            //二维码写入图片
            var color32 = CreateQrcode(qrCode, qrCodeTex.width, qrCodeTex.height);
            qrCodeTex.SetPixels32(color32);
            qrCodeTex.Apply();
            qrCodeImage.texture = qrCodeTex;
            //重新赋值一张图，计算大小,避免白色边框过大
            //Texture2D modifiedQrcode = new Texture2D(190, 190);//创建目标图片大小
            //modifiedQrcode.SetPixels(qrCodeTex.GetPixels(32, 32, 190, 190));
            //modifiedQrcode.Apply();
            //qrCodeImage.texture = modifiedQrcode;
        }
    }

    //定义方法生成二维码
    private Color32[] CreateQrcode(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);
    }