对于一个成功的产品，它是对外封闭的，但又是对外开放的，这句话并不矛盾，让我来说一下，说它对外封闭是因为它本身的代码不允许你去修改，而说它开放，是因为它为我们定义了很多ＡＰＩ，或者叫回调方法，对于jwplayer来说，它为我们提供了很多js的回调方法（事件），它被包含在events属性上的．

应用场合

播放时记录当前视频的时间，播放完成时写入完成的时间，像这些功能，我们都可以通过事件回调的方法解决，即为events属性赋相应的值．

注意

测试时，jwplayer需要在正式网站上测试，而本地打开时，它的events属性是不启作用的

events 实例

 var player = jwplayer("mediaplayer").setup({

            flashplayer: "player.swf",

            file: 'http://localhost/222.mp4',

            autostart: "true",

            bufferlength: '20',

            width: '400',

            height: '400',

            image: '111.jpg',

            events: {

                onComplete: function () { console.log("播放结束!!!"); },

                onVolume: function () { console.log("声音大小改变!!!"); },

                onReady: function () { console.log("准备就绪!!!"); },

                onPlay: function () { console.log("开始播放!!!"); },

                onPause: function () { console.log("暂停!!!"); },

                onBufferChange: function () { console.log("缓冲改变!!!"); },

                onBufferFull: function () { console.log("视频缓冲完成!!!"); },

                onError: function (obj) { console.log("播放器出错!!!" + obj.message); },

                onFullscreen: function (obj) { if (obj.fullscreen) { console.log("全屏"); } else { console.log("非全屏"); } },

                onMute: function (obj) { console.log("静音/取消静音") }

            }

        });

其它回调方法

 player.onBufferChange(function () { alert("缓冲改变!!!"); });

        player.onBufferFull(function () { alert("视频缓冲完成!!!"); });

        player.onError(function (obj) { alert("播放器出错!!!" + obj.message); })

        player.onFullscreen(function (obj) {

            if (obj.fullscreen) { alert("全屏"); }

            else { alert("非全屏"); }

        });

        player.onMute(function (obj) { }) // obj. mute是否静音

        player.onPlaylist(function (obj) { //视频列表载入完成

            alert(obj.playlist[0]['file']);

        });

        var callback = function () { alert("callback");};//定义一个回调方法

        player.onPlaylistItem(callback) // 开始播放一个视频时触发obj.index为视频索引

        player.onReady(callback) //准备就绪

        player.onResize(callback) //obj.width obj.height  宽高

        //进入播放时触发obj.oldstate 值：从BUFFERING PAUSE状态进入播放状态

        player.onPlay(callback)

        //进入暂停obj.oldstate 值1：从PLAYING BUFFERING状态进入暂停

        player.onPause(callback)

        player.onBuffer(callback) //进入加载obj.oldstate 值PLAYING, PAUSED or IDLE

        player.onIdle(callback) //进入空闲obj.oldstate 值PLAYING, PAUSED or BUFFERING.

        player.onComplete(callback) //结束播放

        player.onVolume(callback) //obj.volume

        player.onPlay(function () {

            console.log(this.getPosition());

        });

技巧

我们看到上面的player是它当前的jwplayer对象，有了这个对象，我们就可以在程序的其它位置调用jwplayer的相关回调方法了，如果你没有定义player对象，也可以通过索引

的方式去访问jwplayer实例，如jwplayer(0)表示第一个jwplayer对象．

相关截图

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