UIAbility组件调用UI页面的方法

async function readerModeCb(error: BusinessError, tagInfo: tag.TagInfo) {
     //此处调用UI方法
     //此处调用User页面的getUser() 方法
}
import { UIAbility } from '@kit.AbilityKit';

export default class EntryAbility extends UIAbility {
  
onForeground(): void {
    // Ability has brought to foreground
    //触发函数
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
    if (nfcTagElementName != undefined) {
      let techList: number[] = [];
      try {
        tag.on('readerMode', nfcTagElementName, techList, readerModeCb);
      } catch (error) {
        hilog.error(0x0000, 'testTag', 'on readerMode error = %{public}s', JSON.stringify(error));
      }
    }
    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onForeground');
  }

}

@Component
struct User {
  
  getUser(){

  }

  build() {
  }
}