YouTube API loadVideoById startSeconds 不起作用 [英] YouTube API loadVideoById startSeconds not working

问题描述

我为我嵌入的一些 youtube 视频创建了一个章节选择器.这种方法曾经有效，但最近停止了.我无法弄清楚发生了什么.

我使用他们推荐的格式，但使用 loadVideoById 来显示每一章

<div id="玩家"></div><script type="text/javascript">var tag = document.createElement('script');tag.src = "http://www.youtube.com/iframe_api";var firstScriptTag = document.getElementsByTagName('script')[0];firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);var 播放器；函数 onYouTubeIframeAPIReady() {player = new YT.Player('玩家', {宽度:'625'，videoId: 'FE5jN0rqMtM',事件:{'onStateChange': onPlayerStateChange},玩家变量:{相对:0，wmode:不透明"}});}函数 onPlayerStateChange(evt) {如果(evt.data == 0){$('#video_popup').removeClass('hide_pop');$('#video_popup').addClass('display_pop');}否则如果(evt.data == -1){$('#video_popup').removeClass('display_pop');$('#video_popup').addClass('hide_pop');}别的 {$('#video_popup').removeClass('display_pop');$('#video_popup').addClass('hide_pop');}}函数chapter1(){player.loadVideoById({'videoId': 'FE5jN0rqMtM', 'startSeconds': 0});}函数chapter2(){player.loadVideoById({'videoId': 'FE5jN0rqMtM', 'startSeconds': 63});}函数chapter3(){player.loadVideoById({'videoId': 'FE5jN0rqMtM', 'startSeconds': 135});}<div id="video_popup" class="hide_pop"><div class="video_layover"><div class="promo">感谢收看！<br/><br/></div><div class="link"><a href="javascript:chapter1();">重放视频</a></div>

<div style="margin: 0 auto 20px auto; width:625px; height:98px; text-align:center;"><ul class="玩家"><a href="javascript:chapter1();"><li>第一章</li></a><a href="javascript:chapter2();"><li>第2章</li></a><a href="javascript:chapter3();"><li>第3章</li></a>

解决方案

如果您遇到类似TypeError: ytPlayer.loadVideoById is not a function"的错误，那么我相信你必须等待 onReady 事件触发.

这是我使用的示例代码(部分):

 var ytPlayer;var ytPlayerIsReady = false;//此方法仅在全局范围内定义时才有效！！window.onYouTubeIframeAPIReady = 函数 () {ytPlayer = new YT.Player('ytplayer', {玩家变量:{启用jsapi: 1,控制:0，FS: 1,自动播放:1，相对:0，显示信息:0，适度品牌:1},事件:{上就绪:上就绪，onError: onError,onStateChange: onStateChange}});};//调用 iframe api 的 youtube 代码var tag = document.createElement('script');tag.src = "https://www.youtube.com/iframe_api";var firstScriptTag = document.getElementsByTagName('script')[0];firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);函数 onError(event) {console.log("错误代码" + event.data);}函数 onStateChange(event) {console.log("将状态更改为" + event.data);}函数 onReady(事件){ytPlayerIsReady = 真；console.log("我准备好了");}window.myVideoPlayer = {初始化:功能(选项){//一些任意代码...//诀窍是触发 options.callback,//包含所有需要的逻辑函数超时(){设置超时(函数(){如果(假 === ytPlayerIsReady){暂停();}别的 {如果(选项.回调){options.callback();}}}, 1000);}暂停();}};myVideoPlayer.init({回调:函数(){//现在 youtube api 已准备就绪，您应该可以调用//loadVideoById 没有问题(至少对我有用)//ytPlayer.removeEventListener('onStateChange');//ytPlayer.addEventListener('onStateChange', '_myYtPlayerOnChange');//ytPlayer.loadVideoById({//视频 ID: 'xxxx',//开始秒数:12//});}});

I created a chapter selector for some youtube videos I was embedding. This method used to work but has stopped recently. I can't figure out what's going on.

I'm using their recommended format but use loadVideoById to show each chapter

<div class="wrapper">

<div id="player"></div>

<script type="text/javascript">
  var tag = document.createElement('script');

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

  var player;
  function onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
      width: '625',
      videoId: 'FE5jN0rqMtM',
      events: {
        'onStateChange': onPlayerStateChange    
      },
      playerVars:{
        rel: 0,
        wmode: "opaque"
      }         
    });
  }

  function onPlayerStateChange(evt) {
    if (evt.data == 0) {
          $('#video_popup').removeClass('hide_pop');
          $('#video_popup').addClass('display_pop');
    }
    else if (evt.data == -1) {
          $('#video_popup').removeClass('display_pop');
          $('#video_popup').addClass('hide_pop');
    }
    else {
          $('#video_popup').removeClass('display_pop');
          $('#video_popup').addClass('hide_pop');
    }
  }

  function chapter1() {
       player.loadVideoById({'videoId': 'FE5jN0rqMtM', 'startSeconds': 0});
  }

  function chapter2() {
       player.loadVideoById({'videoId': 'FE5jN0rqMtM', 'startSeconds': 63});
  }

  function chapter3() {
      player.loadVideoById({'videoId': 'FE5jN0rqMtM', 'startSeconds': 135});
  }

</script>

<div id="video_popup" class="hide_pop">
    <div class="video_layover">
        <div class="promo">Thank you for watching!<br /><br /></div>
        <div class="link"><a href="javascript: chapter1();">Replay Video</a></div>
    </div>
</div>  


    <div style="margin: 0 auto 20px auto; width:625px; height:98px; text-align:center;">
    <ul class="player">

            <a href="javascript: chapter1();"><li>Chapter 1</li></a>


            <a href="javascript: chapter2();"><li>Chapter 2</li></a>


            <a href="javascript: chapter3();"><li>Chapter 3</li></a>

    </ul>
    </div>

解决方案

If you experienced an error like "TypeError: ytPlayer.loadVideoById is not a function", then I believe you have to wait for the onReady event to fire.

Here is the sample code (part of) I use:

    var ytPlayer;
    var ytPlayerIsReady = false;


    // this methods only works if defined in the global scope !! 
    window.onYouTubeIframeAPIReady = function () {
        ytPlayer = new YT.Player('ytplayer', {
            playerVars: {
                enablejsapi: 1,
                controls: 0,
                fs: 1,
                autoplay: 1,
                rel: 0,
                showinfo: 0,
                modestbranding: 1
            },
            events: {
                onReady: onReady,
                onError: onError,
                onStateChange: onStateChange
            }
        });
    };


    // youtube code for calling the iframe api
    var tag = document.createElement('script');
    tag.src = "https://www.youtube.com/iframe_api";
    var firstScriptTag = document.getElementsByTagName('script')[0];
    firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);



    function onError(event) {
        console.log("error with code" + event.data);
    }

    function onStateChange(event) {
        console.log("change state to " + event.data);
    }

    function onReady(event) {
        ytPlayerIsReady = true;
        console.log("I'm ready");
    }


    window.myVideoPlayer = {
        init: function (options) {


            // some arbitrary code...
            // the trick is to fire options.callback,
            // which contains all the logic needed



            function timeout() {
                setTimeout(function () {
                    if (false === ytPlayerIsReady) {
                        timeout();
                    }
                    else {
                        if (options.callback) {
                            options.callback();
                        }
                    }
                }, 1000);
            }
            timeout();
        }
    };


    myVideoPlayer.init({
        callback: function(){
            // now the youtube api is ready, you should be able to call
            // loadVideoById without problems (at least it worked for me)



            // ytPlayer.removeEventListener('onStateChange');
            // ytPlayer.addEventListener('onStateChange', '_myYtPlayerOnChange');
            // ytPlayer.loadVideoById({
            //        videoId: 'xxxx',
            //        startSeconds: 12
            //    });

        }
    });

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