YoutubeAPI 视频有时无法在 IE 11 中加载

Question

我制作了一个网站，通过数据库中的id加载视频。我使用YoutubeAPI来嵌入播放器，但在IE播放器有时不加载。这是脚本。

<script>
var player;
var player_width = $(window).width() - 100;
var player_height = $(window).height() - 50;
$('.prev-next').height(player_height);
$('.prev-next-but').height(player_height);
function onYouTubePlayerAPIReady() {
    player = new YT.Player('player', {
        width: player_width,
        height: player_height,
      videoId: '<?php echo $yt_id; ?>',
      events: {
        'onReady': onPlayerReady,
        'onStateChange': onPlayerStateChange
      }
    });
}
function onPlayerReady(event) {
    event.target.playVideo();
}
function onPlayerStateChange(event) {        
    if(event.data === 0) {
        document.forms["not_skipped"].submit();
    }
}    

当我使用简单的iframe时，我没有这个问题，但我不知道如何在视频结束时触发事件。

Answer 1

首先，检查你用来加载播放器API库的方法。如果使用脚本标记，则可能在定义onYouTubePlayerAPIReady函数之前加载脚本，因此不会触发任何操作。为了避免这种竞争条件，您希望像这样加载库:

<script>
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;
var player_width = $(window).width() - 100;
var player_height = $(window).height() - 50;
$('.prev-next').height(player_height);
$('.prev-next-but').height(player_height);
function onYouTubePlayerAPIReady() {
    player = new YT.Player('player', {
        width: player_width,
        height: player_height,
      videoId: '<?php echo $yt_id; ?>',
      events: {
        'onReady': onPlayerReady,
        'onStateChange': onPlayerStateChange
      }
    });
}
function onPlayerReady(event) {
    event.target.playVideo();
}
function onPlayerStateChange(event) {        
    if(event.data === 0) {
        document.forms["not_skipped"].submit();
    }
}
</script>  

现在，关于你提到的另一件事—-将玩家API连接到一个已经存在的iframe中是相当简单的;您只需要将iframe的ID传递给YT.Player构造函数，并且不给它一个宽度，高度或视频ID，像这样:

<iframe id="myplayer" width="560" height="315" src="//www.youtube.com/embed/0kl3VNy0uAI?enablejsapi=1" frameborder="0" allowfullscreen></iframe>    
<script>
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;
function onYouTubePlayerAPIReady() {
    player = new YT.Player('myplayer', {
      events: {
        'onReady': onPlayerReady,
        'onStateChange': onPlayerStateChange
      }
    });
}
function onPlayerReady(event) {
    event.target.playVideo();
}
function onPlayerStateChange(event) {        
    if(event.data === 0) {
        document.forms["not_skipped"].submit();
    }
}
</script>

请注意，我们仍然是动态加载播放器库，以避免竞争条件。