使用YouTube API和Angular 6(字体脚本)

我可以让youtube iframe api(不知何故)在Angular6应用程序中工作。但是,我想从我控制的列表中为它提供动态视频ID。我的计划是从播放器中收听事件,然后在播放完当前视频后加载另一个视频。但我似乎无法克服这个问题。我还在学习typescript和angular,我很好奇为什么我从iframe api播放器中调用的任何函数调用的任何方法都会得到未捕获的类型错误:

这是我的代码:

import { Component, OnInit, AfterViewInit } from '@angular/core';
import { Video } from '../shared/model/video.model';
import { Subscription } from 'rxjs';
import { VideoPlayerService } from '../shared/services/video-player.service';

@Component({
  selector: 'ntv-video-player',
  templateUrl: './video-player.component.html',
  styleUrls: ['./video-player.component.css']
})
export class VideoPlayerComponent implements OnInit, AfterViewInit {

  player;
  video: Video;
  videos: Video[];
  videoSubscription: Subscription;

  constructor(private videoService: VideoPlayerService) { }

  ngAfterViewInit() {
    const doc = (<any>window).document;
    const playerApiScript = doc.createElement('script');
    playerApiScript.type = 'text/javascript';
    playerApiScript.src = 'https://www.youtube.com/iframe_api';
    doc.body.appendChild(playerApiScript);
  }

  ngOnInit() {

    (<any>window).onYouTubeIframeAPIReady = () => {
      this.player = new (<any>window).YT.Player('player', {
        height: '100%',
        width: '100%',
        // videoId: this.getVideo(),
        events: {
          'onReady': this.onPlayerReady,
          'onStateChange': this.onPlayerStateChange
        },
        playerVars: {
          autoplay: 1,
          controls: 0,
          modestbranding: 1,
          // playlist: 'UG3sfZKtCQI,ALZHF5UqnU4,x9ZkC3OgI78',
          rel: 0,
          showInfo: 0
        }
      });
    };
  }



  // The API calls this function when the player's state changes.
  onPlayerStateChange(event) {
    console.log('onPlayerStateChange');
    console.log(event.data);
  }

  // The API will call this function when the video player is ready
  onPlayerReady(event) {
    console.log(event);

    const videoId = this.getVideo();
    event.target.cueVideoById({
      'videoId': videoId
    });
    event.target.playVideo();
  }

  getVideo() {
    return '60ItHLz5WEA';
  }

}

下面是我得到的错误:

    Uncaught TypeError: Cannot read property 'getVideo' of undefined
    at push../src/app/video-player/video-player.component.ts.VideoPlayerComponent.onPlayerReady (video-player.component.ts:63)
    at M.h.G (www-widgetapi.js:48)
    at Y.h.o (www-widgetapi.js:92)
    at Y.h.H (www-widgetapi.js:105)
    at Wa.g (www-widgetapi.js:81)
    at Oa.f (www-widgetapi.js:70)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)
    at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (zone.js:496)
    at invokeTask (zone.js:1540)
push../src/app/video-player/video-player.component.ts.VideoPlayerComponent.onPlayerReady    @   video-player.component.ts:63
h.G @   www-widgetapi.js:48
h.o @   www-widgetapi.js:92
h.H @   www-widgetapi.js:105
Wa.g    @   www-widgetapi.js:81
Oa.f    @   www-widgetapi.js:70
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask    @   zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask   @   zone.js:188
push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask    @   zone.js:496
invokeTask  @   zone.js:1540
globalZoneAwareCallback

如果我从“videoid”属性调用它,这个.getvideo()似乎可以工作,但我希望能够调用OnPlayerReady或OnPlayerStateChange,以便使其更具动态性。以前有人做过这个吗?没有很多关于角的文档。

事先谢谢。