组件之间的角度2传递值

Question

I have 4 components on my Angular 2 app. Components are Header, Footer, Navigation and Content. I have a button in the header component and I want to show/hide the content in the navigation component when user click on the button from the header component. I want to know that when I click the button from the header how to pass the Boolean value from header component to the navigation component. All the components have their own html templates. Let me know what is the way to pass the toggle value from header to navigation component.

Thanks

Answer 1

You can take advantage of sharedservice and sharedobject as shown below.

working demo

sharedService.ts

export interface ImyInterface {
   show:boolean;
}

@Injectable()
export class sharedService {
  showhide:ImyInterface={show:true};

  hide(){
        this.showhide.show=!this.showhide.show;
  }
} 

header.ts (content.ts)

import {Component,Injectable} from 'angular2/core';
import {sharedService} from 'src/sharedService';

@Component({
  selector: 'thecontent',
    template: `
    <div>Header Component <button (click)=showhide()>show/hide</button></div>
    `
})
export class TheContent {
  constructor(private ss: sharedService) {
    console.log("content started");
  }
  showhide() {
    this.ss.hide();
  }
}

navigation.ts (nav.ts)

import {Component,bind} from 'angular2/core';
import {sharedService} from 'src/sharedService';

@Component({
  selector: 'navbar',
  template: `
  <style>
    .bk{
          background-color:black;
          color:white;
    }
  </style>
  <div>Navigation Component </div>
  <div [class.bk]="true" *ngIf="showHide.show"> Showing </div>
  <hr>
  <hr>
  `
})
export class Navbar {
  showHide:ImyInterface;
  constructor(ss: sharedService) {
    this.showHide=ss.showhide;
  }
}