当您更改YouTube视频ID时,相同的代码行为会有所不同。
问题在于,当您拉动进度滑块时,它会在一个视频上触发onStateChange事件,而不会触发另一个视频。检查下面的两个示例,并尝试在两个示例中拉出时间滑块并观察console.log。
为什么拉动时间滑块时只有一个视频会对 onStateChange 作出反应?
两个视频对播放/暂停按钮的反应都很好,但不是时间滑块...只有一个正在工作。
我错过了什么吗?任何帮助真的很感激
Youtube代码1(正常工作): (http://jsfiddle.net/2t9omgwm/)
home/ubuntu/workspace/node_modules/mongodb/lib/mongodb/db.js:299
throw err;
^
TypeError: Converting circular structure to JSON
at Object.stringify (native)
at ServerResponse.res.json (/home/ubuntu/workspace/node_modules/express/lib/response.js:185:19)
at ServerResponse.res.send (/home/ubuntu/workspace/node_modules/express/lib/response.js:117:21)
at /home/ubuntu/workspace/server.js:67:21
at MongoClient.open (/home/ubuntu/workspace/node_modules/mongodb/lib/mongodb/mongo_client.js:103:5)
at Db.open (/home/ubuntu/workspace/node_modules/mongodb/lib/mongodb/db.js:296:11)
at process._tickCallback (node.js:442:13)
另一个视频无效: (http://jsfiddle.net/ctgomt7t/)
<!-- 1. The <iframe> (and video player) will replace this <div> tag. -->
<div id="player"></div>
<script>
// 2. This code loads the IFrame Player API code asynchronously.
var tag = document.createElement('script');
tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
// 3. This function creates an <iframe> (and YouTube player)
// after the API code downloads.
var player;
function onYouTubeIframeAPIReady() {
player = new YT.Player('player', {
height: '390',
width: '640',
videoId: 'M7lc1UVf-VE',
iv_load_policy: 3,
showinfo:0,
//videoId: 'Fj73JF_bhjc',
events: {
'onReady': onPlayerReady,
'onStateChange': onPlayerStateChange
}
});
}
// 4. The API will call this function when the video player is ready.
function onPlayerReady(event) {
//event.target.playVideo();
}
// 5. The API calls this function when the player's state changes.
// The function indicates that when playing a video (state=1),
// the player should play for six seconds and then stop.
var done = false;
function onPlayerStateChange(event) {
console.log('state changed');
//player.seekTo(0, true);
if (event.data == YT.PlayerState.PLAYING && !done) {
done = true;
}
}
</script>
`
答案 0 :(得分:1)
由于以下原因之一,onPlayerStateChange
事件被触发:
-1 =未启动
0 =已结束
1 =正在播放
2 =暂停
3 =缓冲
5 =视频提示
我认为你在更长的视频中看到的是当你移动滑块时(3)缓冲的事件。但是,在较短的视频上没有缓冲,因此您看不到该事件。
您可以通过将代码更改为console.log('state changed : ' + event.data)
来查看此内容。