Angular 2 – 一个组件触发刷新页面上的另一个组件

我有一个组件ComponentA,显示元素列表.此列表在ngOnInit期间显示.

我有另一个组件ComponentB提供可能影响ComponentA中显示的元素列表的控件.例如.可以添加元素.

我需要一种方法来触发ComponentA的重新启动.

有人有想法吗？

细节

A是一个HeaderBar,其菜单显示“savedSearchs”列表

@Component({
  selector: 'header-bar',templateUrl: 'app/headerBar/headerBar.html'
})
export class HeaderBarComponent implements OnInit{
  ...
  ngOnInit() {
    // init list of savedSearches
    ...
  }
}

B是一个可以保存搜索的SearchComponent

@Component({
  selector: 'search',templateUrl: 'app/search/search.html'
})
export class SearchComponent implements OnInit {
  ...
}

你需要提供组件,并将其注入组件的构造函数中,你需要像我一样调用其他组件的ngOnInit.

Plunker演示：https://plnkr.co/edit/M0d65wHjfg4KfwaQ5mPM?p=preview

//our root app component
import {Component,NgModule,VERSION,OnInit} from '@angular/core'
import {browserModule} from '@angular/platform-browser'

@Component({
  selector: 'my-app',template: `
    <div>
      <h2>Hello {{name}}</h2>
       <comp-one></comp-one>
       <comp-two></comp-two>
    </div>
  `,})
export class App {
  name:string;
  constructor( ) {
    this.name = `Angular! v${VERSION.full}`
  }
}

// ComponentOne with ngOnInit

@Component({
  selector: 'comp-one',template: `<h2>ComponentOne</h2>`,})
export class ComponentOne implements OnInit {

  ngOnInit(): void {
    alert("ComponentOne ngOnInit Called")
  }

}

// Added provider of ComponentOne here and injected inside constructor the on button click call ngOnInit of ComponentOne from this component
@Component({
  providers:[ComponentOne],selector: 'comp-two',template: ` Component Two: <button (click)="callMe()">Call Init of ComponentOne</button>`,})
export class ComponentTwo implements OnInit {

   constructor(private comp: ComponentOne ) {
    this.name = `Angular! v${VERSION.full}`
  }
  public callMe(compName: any): void {
    this.comp.ngOnInit();
  }


}
@NgModule({
  imports: [ browserModule ],declarations: [ App,ComponentOne,ComponentTwo ],bootstrap: [ App ]
})
export class AppModule {}

原文地址：https://www.jb51.cc/angularjs/141064.html