backbone.js - BackboneJS Youtube Player 不触发视频

Question

我有这个 Backbone 应用程序，我想在其中显示来自 youtube 的视频。我通过 API 和模型动态获取 youtube 视频 ID。到现在为止还挺好。 Youtube 播放器被渲染，但播放器给了我一个错误，表明它无法识别 VideoID，即使当我控制台记录 video_id 时，它也会返回正确的 video_id。

所以我的 View 看起来像这样:

beforeRender: function() {
    var artistvideosModel = new ArtistVideos.ArtistVideosModel();
    artistvideosModel.artist_id = this.artist_id;
    artistvideosModel.video_youtube_id = this.video_youtube_id;
    artistvideosModel.fetch();
},

afterRender: function() {

  var tag = document.createElement('script');

  tag.src = "https://www.youtube.com/iframe_api";
  var firstScriptTag = document.getElementsByTagName('script')[0];
  firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

  var player;
  window.onYouTubeIframeAPIReady = function() {
    player = new YT.Player('vid', {
      height: '390',
      width: '640',
      videoId: this.video_youtube_id,
      events: {
        'onReady': onPlayerReady,
        'onStateChange': onPlayerStateChange
      }
    });
  }

  function onPlayerReady(event) {
    event.target.playVideo();
  }

  var done = false;
  function onPlayerStateChange(event) {
    if (event.data == YT.PlayerState.PLAYING && !done) {
      setTimeout(stopVideo, 6000);
      done = true;
    }
  }
  function stopVideo() {
    player.stopVideo();
  }
}

有谁知道这里可能是什么问题？请帮忙...

提前致谢

Answer 1

您需要绑定(bind)上下文:

window.onYouTubeIframeAPIReady = _.bind(function() {
  player = new YT.Player('vid', {
    height: '390',
    width: '640',
    videoId: this.video_youtube_id,
    events: {
      onReady: onPlayerReady,
      onStateChange: onPlayerStateChange
    }
 })
}, this);