如何使ngrx效果等待异步函数

import { Injectable } from '@angular/core';
import { Actions, createEffect, ofType } from '@ngrx/effects';
import { of } from 'rxjs';
import { catchError, map, switchMap } from 'rxjs/operators';

@Injectable()
export class MyEffects {
  myEffect$ = createEffect(() =>
    this.actions$.pipe(
      ofType('MY_ACTION'), // 监听特定的动作
      switchMap(() =>
        this.myService.asyncFunction().pipe(
          map(response => ({ type: 'SUCCESS_ACTION', payload: response })),
          catchError(error => of({ type: 'ERROR_ACTION', payload: error }))
        )
      )
    )
  );

  constructor(private actions$: Actions, private myService: MyService) {}
}