是否在组件加载时未调用Angular material自动完成更改事件？

import { Component, OnInit, ViewChild } from '@angular/core';
import { MatAutocompleteTrigger } from '@angular/material/autocomplete';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponent implements OnInit {
  @ViewChild(MatAutocompleteTrigger) autocomplete: MatAutocompleteTrigger;

  ngOnInit() {
    // 手动触发自动完成的更改事件
    this.autocomplete.updateValueAndValidity();
  }
}