请检查代码：
import { Injectable, EventEmitter, ElementRef, Renderer2, RendererFactory2 } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { Observer } from 'rxjs';
import { connect, createLocalTracks, createLocalVideoTrack } from 'twilio-video';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { Http } from '@angular/http';
import { Router } from '@angular/router';
import { BaCustomPreLoader } from './baCustomPreloader.service';
@Injectable()
export class TwilioService {
remoteVideo: ElementRef;
localVideo: ElementRef;
previewing: boolean;
msgSubject = new BehaviorSubject("");
roomObj: any;
roomParticipants;
private renderer: Renderer2;
constructor(
private http: Http,
private router: Router,
private rendererFactory: RendererFactory2,
private baCustomPreLoader: BaCustomPreLoader) {
this.renderer = rendererFactory.createRenderer(null, null);
}
getToken(username): Observable<any> {
return this.http.post('/abc', { uid: 'ashish' });
}
microphone = true;
mute() {
this.roomObj.localParticipant.audioTracks.forEach(function (
audioTrack
) {
audioTrack.track.disable();
});
this.microphone = false;
}
unmute() {
this.roomObj.localParticipant.audioTracks.forEach(function (
audioTrack,
key,
map
) {
audioTrack.track.enable();
});
this.microphone = true;
}
connectToRoom(accessToken: string, options): void {
connect(accessToken, options).then(room => {
this.roomObj = room;
if (!this.previewing && options['video']) {
this.startLocalVideo();
this.previewing = true;
}
this.roomParticipants = room.participants;
room.participants.forEach(participant => {
this.attachParticipantTracks(participant);
});
room.on('participantDisconnected', (participant) => {
this.detachParticipantTracks(participant);
});
room.on('participantConnected', (participant) => {
this.roomParticipants = room.participants;
this.attachParticipantTracks(participant);
participant.on('trackAdded', track => {
const element = track.attach();
this.renderer.data.id = track.sid;
this.renderer.setStyle(element, 'height', '100%');
this.renderer.setStyle(element, 'max-width', '100%');
this.renderer.appendChild(this.remoteVideo.nativeElement, element);
this.attachVideoClass();
this.baCustomPreLoader.hide();
});
});
// When a Participant adds a Track, attach it to the DOM.
room.on('trackAdded', (track, participant) => {
this.attachTracks([track]);
});
// When a Participant removes a Track, detach it from the DOM.
room.on('trackRemoved', (track, participant) => {
this.detachTracks([track]);
});
room.once('disconnected', room => {
room.localParticipant.tracks.forEach(track => {
track.track.stop();
const attachedElements = track.track.detach();
attachedElements.forEach(element => element.remove());
room.localParticipant.videoTracks.forEach(video => {
const trackConst = [video][0].track;
trackConst.stop(); // <- error
trackConst.detach().forEach(element => element.remove());
room.localParticipant.unpublishTrack(trackConst);
});
let element = this.remoteVideo.nativeElement;
while (element.firstChild) {
element.removeChild(element.firstChild);
}
let localElement = this.localVideo.nativeElement;
while (localElement.firstChild) {
localElement.removeChild(localElement.firstChild);
}
this.router.navigate(['thanks']);
setTimeout(() => {
window.location.reload();
}, 1000)
});
});
}, (error) => {
alert(error.message);
});
}
attachParticipantTracks(participant): void {
participant.tracks.forEach(part => {
this.trackPublished(part);
});
}
trackPublished(publication) {
if (publication.isSubscribed)
this.attachTracks(publication.track);
if (!publication.isSubscribed)
publication.on('subscribed', track => {
this.attachTracks(track);
});
}
attachTracks(tracks) {
const element = tracks.attach();
this.renderer.data.id = tracks.sid;
this.renderer.setStyle(element, 'height', '100%');
this.renderer.setStyle(element, 'max-width', '100%');
this.renderer.appendChild(this.remoteVideo.nativeElement, element);
this.attachVideoClass();
this.baCustomPreLoader.hide();
}
startLocalVideo(): void {
createLocalVideoTrack({
video: { width: 1280, height: 720 },
}).then(track => {
if (this.localVideo) {
const element = track.attach();
this.renderer.data.id = track.sid;
this.renderer.setStyle(element, 'width', '25%');
this.renderer.appendChild(this.localVideo.nativeElement, element);
this.attachVideoClass();
}
});
}
detachParticipantTracks(participant) {
this.detachTracks(participant);
}
detachTracks(tracks): void {
tracks.tracks.forEach(track => {
let element = this.remoteVideo.nativeElement;
while (element.firstChild) {
element.removeChild(element.firstChild);
}
});
}
attachVideoClass() {
let remote = document.getElementById('remote');
}
}