HarmonyOS 请提供一个调用系统相册的能力的demo

import { photoAccessHelper } from '@kit.MediaLibraryKit'; 
import { BusinessError } from '@kit.BasicServicesKit'; 
@Entry 
@Component 
struct GetPicPage { 
  build() { 
    Column() { 
      Button("pickImage").onClick(() => { 
        try { 
          let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions(); 
          PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE; 
          PhotoSelectOptions.maxSelectNumber = 10; 
          let photoPicker = new photoAccessHelper.PhotoViewPicker(); 
          photoPicker.select(PhotoSelectOptions).then((PhotoSelectResult: photoAccessHelper.PhotoSelectResult) => { 
            // this.PhotoSelectResult = PhotoSelectResult 
            console.info('PhotoViewPicker.select successfully, PhotoSelectResult uri: ' + JSON.stringify(PhotoSelectResult)); 
          }).catch((err: BusinessError) => { 
            console.error('PhotoViewPicker.select failed with err: ' + JSON.stringify(err)); 
          }); 
        } catch (error) { 
          let err: BusinessError = error as BusinessError; 
          console.error('PhotoViewPicker failed with err: ' + JSON.stringify(err)); 
        } 
      }) 
    } 
    .height('100%') 
    .width('100%') 
  } 
}