使用Scan Kit（统一扫码服务），通过文本生成生成码

// 通过文本生成生成码 Promise方式
      Button('生成码').genButton()
        .onClick(() => {
          this.pixelMap = undefined;
          let content = this.mContext;
          let options: generateBarcode.CreateOptions = {
            scanType: this.mScanType,
            width: Number(this.mWidth),
            height: Number(this.mHeight),
            margin: Number(this.mMargin),
            level: this.mLevel,
            backgroundColor: this.mBackgroundColor,
            pixelMapColor: this.mPixelMapColor,
          }
          try {
            generateBarcode.createBarcode(content, options).then((result: image.PixelMap) => {
              this.pixelMap = result;
            }).catch((error: BusinessError) => {
              hilog.error(0x0001, TAG,
                `Failed to get pixelMap by promise with options. Code: ${error.code}, message: ${error.message}`);
            })
          } catch (error) {
            showError(error);
            hilog.error(0x0001, TAG, `Failed to createBarCode. Code: ${error.code}, message: ${error.message}`);
          }
        })
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