youtube-api - onYouTubeIframeAPIReady() 未触发

Question

我已经查看了很多问题和 youtube api 的东西，但我一生都无法弄清楚为什么 onYouTubeIframeAPIReady 不起作用。

这是我的 iframe：

<iframe id="youtube_vid" width="763" height="430" src="https://www.youtube.com/embed/dlJshzOv2cw?theme=light&amp;showinfo=0&amp;rel=0&amp;enablejsapi=1" frameborder="0" allowfullscreen=""></iframe>

还有我的脚本：

function callYTapi() {

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

    function onYouTubeIframeAPIReady() {
        console.log('IframeAPI = Ready');
        var player = new YT.Player('youtube_vid', {
            events: {
                'onReady': onPlayerReady,
                'onStateChange': onPlayerStateChange
            }
        });
    }

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

    function onPlayerStateChange(event) {
        if (event.data == YT.PlayerState.PAUSED) {
            console.log("Paused");
        }

        if (event.data == YT.PlayerState.PLAYING) {
            console.log("Playing");
        }

        if (event.data == YT.PlayerState.ENDED) {
            end(); 
        }
    }
}

我得到了加载脚本的console.log，但没有准备好Iframe或其他任何东西。有任何想法吗？谢谢

Answer 1

回调函数必须在全局范围内。只是将onYouTubeIframeAPIReady其他人移到外面callYTapi。

Answer 2

对我来说幸运的是，在对控制台进行了大量试验之后，我有了一些具体的东西。直到一天前我还遇到了同样的问题，并且在我处于单例范围内时想出了如何做。

这是我的代码的样子：

var XT = XT || {};

window.onYouTubeIframeAPIReady = function(){
    setTimeout(XT.yt.onYouTubeIframeAPIReady,500);
}

XT.yt = {

/* load the YouTube API first */
loadApi: function () {

        var j = document.createElement("script"),
            f = document.getElementsByTagName("script")[0];
        j.src = "//www.youtube.com/iframe_api";
        j.async = true;
        f.parentNode.insertBefore(j, f);
        console.log('API Loaded');
    },

/*default youtube api listener*/
onYouTubeIframeAPIReady: function () {
    console.log('API Ready?');
    window.YT = window.YT || {};
    if (typeof window.YT.Player === 'function') {
        player = new window.YT.Player('player', {
            width: '640',
            height: '390',
            videoId: 'nE6mDCdYuwY',
            events: {
                onStateChange: XT.yt.onPlayerStateChange,
                onError: XT.yt.onPlayerError,
                onReady: setTimeout(XT.yt.onPlayerReady, 4000)
            }
        });
    }
},


onPlayerReady: function() {
    player.playVideo(); /* start the video */
    player.setVolume(1); /* set volume to 1 (accepts 0-100) */
},

onPlayerStateChange: function (e) {
    console.log(e.data, YT.PlayerState.PLAYING, e.data === YT.PlayerState.PLAYING);
    var video_data = e.target.getVideoData();

    //do something on video ends
    if(e.data === YT.PlayerState.ENDED)
    this.onPlayerStop();
},

onPlayerStop: function(){
    //console.log('video ended');
},

onPlayerError: function (e) {
    console.log( "youtube: " + e.target.src + " - " + e.data);
},

init: function () {
    this.loadApi();
}

}

XT.yt.init();

Answer 3

为了清楚起见，上面接受的答案似乎对我有用：

加载 API（来自 yt 文档）

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

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

在窗口中指定 YouTube 的内置就绪函数“onYouTubeIframeAPIReady”

window.onYouTubeIframeAPIReady = this.onYTready;

我this.onYTready的函数名称也是如此，位于其他地方。我可以确认我的onYTready函数可以在 Chrome 中控制台日志/调试器断点。

（编辑）您可能希望将此绑定到您的函数，例如：

window.onYouTubeIframeAPIReady = this.onYTready.bind(this);

或“this”将用于窗口而不是您可能正在使用的特定视图..

Answer 4

function playIframeVideo(iframe) {
    iframe.videoPlay = true; //init state
    iframe.contentWindow.postMessage('{"event":"command","func":"playVideo","args":""}', '*');
}

function pauseIframeVideo(iframe) {
    iframe.videoPlay = false; //init state
    iframe.contentWindow.postMessage('{"event":"command","func":"pauseVideo","args":""}', '*');
}

$('.vc_video-bg-container').on('click', function () {

    var iframe = $('iframe').get(0); //iframe tag

    if (iframe.videoPlay != true) {
        playIframeVideo(iframe);
    } else {
        pauseIframeVideo(iframe);
    }
});