使用Scan Kit（统一扫码服务），通过接数组生成码图

// 通过接数组生成码图 Promise方式
      Button('生成乘车码').genButton()
        .onClick(() => {
          this.pixelMap = undefined;
          let content = this.mContext;
          let pattern = /^[0-9a-fA-F]+$/;
          if (content && !pattern.test(content)) {
            promptAction.showToast({
              message: '乘车码是通过字节数组生成，请输入十六进字符串表示的字节数组',
              duration: 2000
            });
            return;
          }
          if (content.length % 2 !== 0) {
            content = '0' + content;
          }
          let contentBuffer: ArrayBuffer = buffer.from(content, 'hex').buffer;
          let options: generateBarcode.CreateOptions = {
            scanType: this.mScanType,
            height: Number(this.mHeight),
            width: Number(this.mWidth),
            margin: Number(this.mMargin),
            level: this.mLevel,
            backgroundColor: this.mBackgroundColor,
            pixelMapColor: this.mPixelMapColor,
          }

          try {
            generateBarcode.createBarcode(contentBuffer, options).then((result: image.PixelMap) => {
              this.pixelMap = result;
              hilog.info(0x0001, TAG, 'Succeeded in creating barCode.');
            }).catch((error: BusinessError) => {
              showError(error);
              hilog.error(0x0001, TAG,
                `catch Failed to create barCode. Code: ${error.code}, message: ${error.message}`);
            })
          } catch (error) {
            showError(error);
            hilog.error(0x0001, TAG, `000 Failed to create barCode. Code: ${error.code}, message: ${error.message}`);
          }
        })