javascript - onStateChange将不会触发

我已经尝试了一段时间，以创建一个嵌入式YouTube播放器，当有人加载页面时，该播放器会自动以随机播放方式启动播放列表。几次搜索使我找到了另一种解决方案:当当前视频结束时，在播放列表中加载随机索引的新视频。

这是我目前拥有的代码:

<div id="player"></div>
<button value="next" onclick="next();">Next</button>
<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 onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
        height: '390',
        width: '640',
        events: {
            'onReady': onPlayerReady,
                'onStateChange': onPlayerStateChange
        }

    });
}
var oldNumber = 0;
var NewNumber = 0;

function newRandomNumber(min, max) {
    oldNumber = NewNumber;
    NewNumber = Math.floor(Math.random() * max) + min;
    if (NewNumber == oldNumber) {
        newRandomNumber(min, max);
    } else {
        return NewNumber;
    }
}


function onPlayerReady(event) {
    next();

}

function next() {
    player.loadPlaylist({
        'listType': 'playlist',
        'list': 'PLxBKLJmrCEphpgRihb-H0QUColR_bFu6s',
        'index': newRandomNumber(0, 139),
        'startSeconds': '0',
        'suggestedQuality': 'small'
    });
    player.setShuffle({
        'shufflePlaylist': true
    });
}


function onPlayerStateChange(event) {
    if (event.data == 0) {
    next();
}
}
</script>

经过一些反复的测试，看起来这部分无法正常工作:

function onPlayerStateChange(event) {
    if (event.data == 0) {

我尝试将其设置为其他整数并进行适当的测试，但似乎没有东西会触发该事件。

值得一提的是，大部分代码都是从这里获取的，但我无法在该页面上找到任何帮助:Shuffle Playlist fix for Youtube API

谢谢。

最佳答案

如果我们在实例化YouTube播放器时设置了random和playlist参数，则随机播放和事件有效。这是显示工作球员的代码:

<div id="player"></div>
<button value="next" onclick="next();">Next</button>
<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 onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
        height: '390',
        width: '640',
        events: {
            'onReady': onPlayerReady,
            'onStateChange': onPlayerStateChange
        },
        playerVars: {
            'html5': 1,
            'listType': 'playlist',
            'list': 'PLxBKLJmrCEphpgRihb-H0QUColR_bFu6s',
            'index': newRandomNumber(0, 139),
            'startSeconds': '0',
            'autoplay': 1,
            'suggestedQuality': 'small'
          }

    });

}
var oldNumber = 0;
var NewNumber = 0;

function newRandomNumber(min, max) {
    oldNumber = NewNumber;
    NewNumber = Math.floor(Math.random() * max) + min;
    if (NewNumber == oldNumber) {
        newRandomNumber(min, max);
    } else {
        console.log(NewNumber);
        return NewNumber;
    }
}

function onPlayerReady(){
    //nothing to do as of now.
}

function next() {
    console.log('next called');
    player.setShuffle({
        'shufflePlaylist': true
    });
}


function onPlayerStateChange(event) {
    if (event.data == 0) {
        next();
    }
}
</script>

关于javascript - onStateChange将不会触发，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/33978525/