从Angular2中的控制器中的模板访问局部变量

我正在编写一个组件，我需要访问< audio controls>原生元素。我现在这样做，现在通过使用这个this.elementRef.nativeElement.querySelector(“audio”)的ElementRef获取它在ngOnInit();

虽然它的作品我认为这是非常不安，Angular2也是warns of the risks when using ElementRef ..

真的没有简单的方法吗？

我可以将其标记为带有< audio controls#player>的局部变量。并以某种方式通过this.player访问本机元素或类似于控制器的东西？

import {Component,OnInit,ElementRef,Input} from 'angular2/core';

@Component({
    selector: 'audio-preview',template: `
        <audio controls>
            <source [src]="src" type="audio/mpeg">
            Your browser does not support the audio element.
        </audio>
    `
})

export class AudioPreview implements OnInit {

    @input() src: string;

    constructor(public elementRef: ElementRef) {}

    ngOnInit() {
        var audioElement = this.getAudioElement();
        audioElement.setAttribute('src',this.src);
    }

    getAudioElement() : HTMLAudioElement {
        return this.elementRef.nativeElement.querySelector("audio");
    }
}

import {Component,Input,ViewChild,Renderer} from 'angular2/core';

@Component({
  selector: 'audio-preview',template: `
    <audio controls #player [attr.src]="src">
      <source [src]="src" type="audio/mpeg">
      Your browser does not support the audio element.
    </audio>
    `
})
export class AudioPreview {
  @input() src: string;
  @ViewChild('player') player;

  constructor(public renderer: Renderer) {}

  ngAfterViewInit() {
    console.log(this.player);

    // Another way to set attribute value to element
    // this.renderer.setElementAttribute(this.player,'src',this.src);
  }
}