jPlayer 不在播放列表对象的全局声明中播放歌曲

Question

这是我的 js：

$(document).ready(function(){
    var cssSelector = {
        jPlayer: "#jplayer_N",
        cssSelectorAncestor: "#jp_container_N"
    };

    var playlist = [];

    var options = {
        playlistOptions: {
            enableRemoveControls: true,
            autoPlay: true
        },
        swfPath: "js/jPlayer",
        supplied: "webmv, ogv, m4v, oga, mp3",
        smoothPlayBar: true,
        keyEnabled: true,
        audioFullScreen: false
    };

    var myPlaylist = new jPlayerPlaylist(cssSelector, playlist, options);

    function loadSong(){
        var song_artist = findArtist();
        var song_title = findTitle();
        var song_poster = findPoster();      

        myPlaylist.add({
            title: song_title,
            artist: song_artist,
            oga: sessionStorage.getItem("file_url"),
            poster: song_poster
        });

        $(document).on($.jPlayer.event.pause, myPlaylist.cssSelector.jPlayer,  function(){
            $('.musicbar').removeClass('animate');
            $('.jp-play-me').removeClass('active');
            $('.jp-play-me').parent('li').removeClass('active');
        });

        $(document).on($.jPlayer.event.play, myPlaylist.cssSelector.jPlayer,  function(){
            $('.musicbar').addClass('animate');
        });

        $(document).on('click', '.jp-play-me', function(e){
            e && e.preventDefault();
            var $this = $(e.target);
            if (!$this.is('a')) $this = $this.closest('a');

            $('.jp-play-me').not($this).removeClass('active');
            $('.jp-play-me').parent('li').not($this.parent('li')).removeClass('active');

            $this.toggleClass('active');
            $this.parent('li').toggleClass('active');
            if( !$this.hasClass('active') ){
                myPlaylist.pause();
            }else{
                var i = Math.floor(Math.random() * (1 + 7 - 1));
                myPlaylist.play(i);
            }
        });
    }    
});

调用 loadSong() 时，我可以看到我的歌曲在 myPlaylist.playlist 数组中排队。但是，jPlayer 就是不会播放我的歌曲。

此外，不知何故，这似乎对我有用：

$(document).ready(function(){
    var cssSelector = {
        jPlayer: "#jplayer_N",
        cssSelectorAncestor: "#jp_container_N"
    };

    var playlist = [];

    var options = {
        playlistOptions: {
            enableRemoveControls: true,
            autoPlay: true
        },
        swfPath: "js/jPlayer",
        supplied: "webmv, ogv, m4v, oga, mp3",
        smoothPlayBar: true,
        keyEnabled: true,
        audioFullScreen: false
    };

    function loadSong(){
        var song_artist = findArtist();
        var song_title = findTitle();
        var song_poster = findPoster();      

        var myPlaylist = new jPlayerPlaylist(cssSelector, playlist, options);

        myPlaylist.add({
            title: song_title,
            artist: song_artist,
            oga: sessionStorage.getItem("file_url"),
            poster: song_poster
        });

        $(document).on($.jPlayer.event.pause, myPlaylist.cssSelector.jPlayer,  function(){
            $('.musicbar').removeClass('animate');
            $('.jp-play-me').removeClass('active');
            $('.jp-play-me').parent('li').removeClass('active');
        });

        $(document).on($.jPlayer.event.play, myPlaylist.cssSelector.jPlayer,  function(){
            $('.musicbar').addClass('animate');
        });

        $(document).on('click', '.jp-play-me', function(e){
            e && e.preventDefault();
            var $this = $(e.target);
            if (!$this.is('a')) $this = $this.closest('a');

            $('.jp-play-me').not($this).removeClass('active');
            $('.jp-play-me').parent('li').not($this.parent('li')).removeClass('active');

            $this.toggleClass('active');
            $this.parent('li').toggleClass('active');
            if( !$this.hasClass('active') ){
                myPlaylist.pause();
            }else{
                var i = Math.floor(Math.random() * (1 + 7 - 1));
                myPlaylist.play(i);
            }
        });
    }    
});

但是，我不能使用它的原因是，每次我调用 loadSong() 函数时，每次都会创建一个新的 myPlaylist 对象，这样我一次只能播放一首歌曲。当我尝试生成播放列表时，我想要一个 static/global（不确定如何称呼它）myPlaylist 对象的实例，使用它我可以将歌曲添加到播放列表。

根据 this I should not have any problem. Also, just to be sure about the scope of myPlaylist, I also tried my hand on creating static properties and methods and this，但这也没有任何帮助。我只是无法弄清楚出了什么问题，更不用说寻找具体的解决方案了。

任何人都可以指出我哪里出错了，在这种情况下可以做什么？

Answer 1

SOLUTION

您需要将 jPlayerPlaylist 初始化和事件处理程序移到 loadSong 之外，并使 myPlaylist 成为全局变量。

DEMO

有关代码和演示，请参阅 this jsFiddle。

Answer 2

抱歉回复晚了。

感谢@Gyrocode.com 的及时回复，但您的解决方案产生的结果与我的问题中提到的相同。

对我有用的是：

$(document).ready(function(){
    var cssSelector = {
        jPlayer: "#jplayer_N",
        cssSelectorAncestor: "#jp_container_N"
    };

    var playlist = [];

    var options = {
        playlistOptions: {
            enableRemoveControls: true,
            autoPlay: true
        },
        swfPath: "js/jPlayer",
        supplied: "webmv, ogv, m4v, oga, mp3",
        smoothPlayBar: true,
        keyEnabled: true,
        audioFullScreen: false
    };

    var myPlaylist = null;

    function loadSong(){
        var song_artist = findArtist();
        var song_title = findTitle();
        var song_poster = findPoster();      

        if(myPlaylist == null)
            myPlaylist = new jPlayerPlaylist(cssSelector, playlist, options);

        myPlaylist.add({
            title: song_title,
            artist: song_artist,
            oga: sessionStorage.getItem("file_url"),
            poster: song_poster
        });

        $(document).on($.jPlayer.event.pause, myPlaylist.cssSelector.jPlayer,  function(){
            $('.musicbar').removeClass('animate');
            $('.jp-play-me').removeClass('active');
            $('.jp-play-me').parent('li').removeClass('active');
        });

        $(document).on($.jPlayer.event.play, myPlaylist.cssSelector.jPlayer,  function(){
            $('.musicbar').addClass('animate');
        });

        $(document).on('click', '.jp-play-me', function(e){
            e && e.preventDefault();
            var $this = $(e.target);
            if (!$this.is('a')) $this = $this.closest('a');

            $('.jp-play-me').not($this).removeClass('active');
            $('.jp-play-me').parent('li').not($this.parent('li')).removeClass('active');

            $this.toggleClass('active');
            $this.parent('li').toggleClass('active');
            if( !$this.hasClass('active') ){
                myPlaylist.pause();
            }else{
                var i = Math.floor(Math.random() * (1 + 7 - 1));
                myPlaylist.play(i);
            }
        });
    }    
});

就是这样。如果尚未初始化，只需添加一个 if 来初始化播放列表对象。而且效果非常好！

jPlayer 不在播放列表对象的全局声明中播放歌曲

jPlayer not playing songs on playlist object's global declaration

javascript

jquery

jplayer