Facebook 嵌入式视频 api 是否仍支持 removeListener()？

Question

根据 facebook 文档 - https://developers.facebook.com/docs/plugins/embedded-video-player/api ，我们订阅玩家事件

    var handleDesktopEvents = function (msg) {
        if (msg.type === 'video') {
            var player = msg.instance;
            var playHandler = player.subscribe('startedPlaying', function() {
                // Video started playing ...
                player.unmute();
                console.log('detected video playing');
                ga_virtual_pagehit(msg.id);
                console.log('sent event to GA');
                playHandler.removeListener('startedPlaying');
                // playHandler.release();
            });
            console.log('detected video ready');
            player.play();
            FB.Event.unsubscribe('xfbml.ready', handleDesktopEvents, handleDesktopEx);
        }
    };
    var  handleDesktopEx = function () {
        // Handle pause() and exceptions
        console.log('detected pause');
    };

    FB.Event.subscribe('xfbml.ready',  handleDesktopEvents, handleDesktopEx);

似乎 removeListener() 在 subscribe() 返回的令牌上不可用。通过调试器，我们看到令牌上有一个方法 release() 可用。应该这样用吗？现在正式了吗？

我是不是做错了什么？

Answer 1

release() 方法曾经存在并且可能仍然存在，除非 FB 再次更改某些内容。它做了 removeListen() 应该做的事情。