HarmonyOS 调用photoViewPicker进入相册，点左上角X取消，怎么监听取消这个动作

无法直接监听，考虑以下间接替代方案：当不选择图片时，无法点击完成按钮，此时只能通过点击X来退出，PhotoSelectResult列表为空当有选择图片时，点击X来退出，PhotoSelectResult列表为空仅当点击完成时，PhotoSelectResult列表不为空故可通过判断PhotoSelectResult列表是否为空来监听取消动作可在如下Demo中观察到PhotoSelectResult列表的变化。

Demo：

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

@Entry
@Component
struct NavigationExample {
  build() {
    Column() {
      Button('click')
        .onClick(()=>{
          example01()
        })
    }
  }
}
async function example01() {
  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}`);
  }
}