HarmonyOS 官方有提供可以直接扫码的功能吗

可以使用Scan Kit参考文档：

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/scan-scanbarcode-V5

import { scanCore, scanBarcode } from '@kit.ScanKit';
// 导入默认界面需要的日志模块和错误码模块
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct ScanBarCodePage {
  build() {
    Column() {
      Row() {
        Button("Promise with options")
          .backgroundColor('#0D9FFB')
          .fontSize(20)
          .fontColor('#FFFFFF')
          .fontWeight(FontWeight.Normal)
          .align(Alignment.Center)
          .type(ButtonType.Capsule)
          .width('90%')
          .height(40)
          .margin({ top: 5, bottom: 5 })
          .onClick(() => {
            // 定义扫码参数options
            let options: scanBarcode.ScanOptions = {
              scanTypes: [scanCore.ScanType.ALL],
              enableMultiMode: true,
              enableAlbum: true
            };
            try {
              scanBarcode.startScanForResult(getContext(this), options).then((result: scanBarcode.ScanResult) => {
                // 收到扫码结果后返回
                hilog.info(0x0001, '[Scan CPSample]', 'Promise scan result: %{public}s', JSON.stringify(result));
              }).catch((error: BusinessError) => {
                hilog.error(0x0001, '[Scan CPSample]', 'Promise error: %{public}s', JSON.stringify(error));
              });
            } catch (error) {
              hilog.error(0x0001, '[Scan CPSample]', 'failReason: %{public}s', JSON.stringify(error));
            }
          })
      }
      .height('100%')
    }
    .width('100%')
  }
}