如何访问或更新其他组件类angular2中的组件类变量

 ```typescript

 import { Component, ViewChild, AfterViewInit } from '@angular/core';

 import { OtherComponent } from '路径/到/其他组件';

 @Component({

   selector: 'app-my-component',

   template: `

     <app-other-component></app-other-component>

   `

 })

 export class MyComponent implements AfterViewInit {

   @ViewChild(OtherComponent) otherComponent: OtherComponent;

   ngAfterViewInit() {

     // 访问或更新其他组件类的变量

     this.otherComponent.otherVariable = '新值';

   }

 }

 ```

 ```typescript

 import { Component } from '@angular/core';

 import { SharedService } from '路径/到/共享服务';

 @Component({

   selector: 'app-my-component',

   template: `

     <button (click)="updateOtherComponentVariable()">更新其他组件变量</button>

   `

 })

 export class MyComponent {

   constructor(private sharedService: SharedService) {}

   updateOtherComponentVariable() {

     // 更新其他组件类的变量

     this.sharedService.updateOtherVariable('新值');

   }

 }

 ```

 ```typescript

 import { Injectable } from '@angular/core';

 @Injectable()

 export class SharedService {

   otherVariable: string;

   updateOtherVariable(newValue: string) {

     this.otherVariable = newValue;

   }

 }

 ```