HarmonyOS detectBarcode.decode扫描相册二维码识别不到数据？

Question

选择图片扫二维码功能，但是扫不出来结果，开摄像头扫码是可以识别到的。https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/scan-imagedecode-V5\#section9221156204617

Answer 1

参考demo：

import { BusinessError } from '@kit.BasicServicesKit';
import { photoAccessHelper } from '@kit.MediaLibraryKit';

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  build() {
    RelativeContainer() {
      Button('picker').onClick(async ()=>{
        try {
          let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
          PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
          PhotoSelectOptions.maxSelectNumber = 5;
          let photoPicker = new photoAccessHelper.PhotoViewPicker();
          photoPicker.select(PhotoSelectOptions).then((PhotoSelectResult: photoAccessHelper.PhotoSelectResult) => {
            console.info('PhotoViewPicker.select successfully, PhotoSelectResult uri: ' + JSON.stringify(PhotoSelectResult));
          }).catch((err: BusinessError) => {
            console.error(`PhotoViewPicker.select failed with err: ${err.code}, ${err.message}`);
          });
        } catch (error) {
          let err: BusinessError = error as BusinessError;
          console.error(`PhotoViewPicker failed with err: ${err.code}, ${err.message}`);
        }
      })
    }
    .height('100%')
    .width('100%')
  }
}