Angular 2 material : sidenav toggle from component

问题:

I'm using Angular 2 Material sidenav in my project this way:

<md-sidenav-layout>
  <md-sidenav #start mode="side" [opened]="true">
      <md-nav-list>
      </md-nav-list>
  </md-sidenav>

  <button md-button (click)="start.toggle()">Close</button>

  <router-outlet></router-outlet>

</md-sidenav-layout>

How to call start.toggle() from my component instead of element with click event?

Thank you for reading

回答1:

You want to declare a ViewChild in your controller that references the MdSidenav inside your component, like this:

// Sidemenu
@ViewChild('start') sidenav: MdSidenav;

where start is the name of the component you want to reference, in this case the sidenav.

Next you can call methods on that sidenav, like this.sidenav.toggle() inside your controller's functions.

https://angular.io/docs/ts/latest/cookbook/component-communication.html#!#parent-to-view-child

回答2:

Pass the object to your function.

<md-sidenav-layout>
  <md-sidenav #start mode="side" [opened]="true">
      <md-nav-list>
      </md-nav-list>
  </md-sidenav>

  <button md-button (click)="randomName(start)">Close</button>

  <router-outlet></router-outlet>

</md-sidenav-layout>

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

@Component({
    selector: 'my-app',
    templateUrl: './app.component.html'
})
export class AppComponent {
    constructor() {
    }

    randomName(start: any) {
        start.toggle();
    }
}

回答3:

 <md-sidenav #sidenav class="example-sidenav" opened="false">
    <div class="example-sidenav-content">
      <button type="button" md-button (click)="toogleNav(sidenav)">
        toogle
      </button>
    </div>
 </md-sidenav>

And in your ts:

export class AppComponent {

  toogleNav(nav: any) {
    if (nav.opened) {
      nav.close()
    } else {
      nav.open();
    }
  }
}