jPlayer不播放播放列表对象的全局声明中的歌曲

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);
            }
        });
    }    
});

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

另外，不管怎样，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，我无法使用它的原因是，每次调用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。当我正在尝试生成播放列表时，我想要一个静态/全局（不完全确定要调用它）的myPlaylist对象实例，我将使用该实例将歌曲添加到播放列表中。

根据this我不应该有任何问题。另外，为了确定myPlaylist的范围，我还尝试了creating static properties and methods和this，但这也没有得到任何帮助。我只是无法弄清楚出了什么问题，单独留出一个具体的解决方案。

任何人都可以指出我哪里出错了，在那种情况下可以做些什么？

Answer 1

  

<强>解

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。

  

<强>样本

请参阅this jsFiddle以获取代码和演示。

Answer 2

对迟到的回复道歉。

感谢@ Gyrocode.com的快速回复，但您的解决方案产生了与我的问题中提到的相同的结果。

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。它就像一个魅力！