如何在名称中引用带有$（美元）符号的javascript对象

我正在尝试从gdata json中提取数据。 但是，对象的名称中有美元符号：

{ "id":{ "$t":"tag:youtube.com,2008:video:xedvi0LiZDA" }, "media$group":{ "media$category":[ { "$t":"Shows", "label":"Shows", "scheme":"http:\/\/gdata.youtube.com\/schemas\/2007\/categories.cat" }, { "$t":"6", "scheme":"http:\/\/gdata.youtube.com\/schemas\/2007\/releasemediums.cat" }, { "$t":"3", "scheme":"http:\/\/gdata.youtube.com\/schemas\/2007\/mediatypes.cat" } ], "media$content":[ { "url":"http:\/\/www.youtube.com\/v\/xedvi0LiZDA?version=3&f=user_uploads&app=youtube_gdata", "type":"application\/x-shockwave-flash", "medium":"video", "isDefault":"true", "expression":"full", "duration":204, "yt$format":5 }, { "url":"rtsp:\/\/v8.cache5.c.youtube.com\/CigLENy73wIaHwkwZOJCi2_nxRMYDSANFEgGUgx1c2VyX3VwbG9hZHMM\/0\/0\/0\/video.3gp", "type":"video\/3gpp", "medium":"video", "expression":"full", "duration":204, "yt$format":1 }, { "url":"rtsp:\/\/v6.cache7.c.youtube.com\/CigLENy73wIaHwkwZOJCi2_nxRMYESARFEgGUgx1c2VyX3VwbG9hZHMM\/0\/0\/0\/video.3gp", "type":"video\/3gpp", "medium":"video", "expression":"full", "duration":204, "yt$format":6 } ], "media$credit":[ { "$t":"epicnetworkmusic", "role":"uploader", "scheme":"urn:youtube", "yt$display":"EpicNetworkMusic", "yt$type":"partner" } ], "media$description":{ "$t":"Our Facebook: http:\/\/on.fb.me\/oW4u8e & T-Shirts: http:\/\/bit.ly\/JSJebo\n---------------------------------------------------------------------------------------------------------------\nComing out on the 'Believe in Music Foundation' album on the 15th October\nhttp:\/\/www.facebook.com\/pages\/Believe-in-Music-Foundation\/130288053775923\n\nSystem\nFacebook: https:\/\/www.facebook.com\/systemdance\nSoundcloud: http:\/\/soundcloud.com\/systemdance\nYouTube: http:\/\/www.youtube.com\/user\/officialsystemuk\n---------------------------------------------------------------------------------------------------------------\nAll the artwork & design is owned by Mike Nesbitt\n\nDeviantArt: http:\/\/vashperado.deviantart.com\/\nTumblr: http:\/\/vashito.tumblr.com\/\nTwitter: https:\/\/twitter.com\/vashperado \n\nWallpaper Download: \nhttp:\/\/vashperado.deviantart.com\/art\/spaceout-264782890\n---------------------------------------------------------------------------------------------------------------\nEpic Network:\nFacebook FanPage: http:\/\/on.fb.me\/h2ubeH\nTwitter: http:\/\/bit.ly\/i4iqZa\nGoogle+ http:\/\/goo.gl\/uO7n1\nSoundcloud: http:\/\/bit.ly\/e1Xukr\n\nTrack's title: System - Circles\n---------------------------------------------------------------------------------------------------------------\nSend demos to [e-mail]\nfor a possible release or get your track featured on ENR!\n\nWe'll get back to you if we like what we hear!\n---------------------------------------------------------------------------------------------------------------", "type":"plain" }, "media$keywords":[ ], "media$license":{ "$t":"youtube", "type":"text\/html", "href":"http:\/\/www.youtube.com\/t\/terms" }, "media$player":{ "url":"http:\/\/www.youtube.com\/watch?v=xedvi0LiZDA&feature=youtube_gdata_player" }, "media$thumbnail":[ { "url":"http:\/\/i.ytimg.com\/vi\/xedvi0LiZDA\/default.jpg", "height":90, "width":120, "time":"00:01:42", "yt$name":"default" }, { "url":"http:\/\/i.ytimg.com\/vi\/xedvi0LiZDA\/mqdefault.jpg", "height":180, "width":320, "yt$name":"mqdefault" }, { "url":"http:\/\/i.ytimg.com\/vi\/xedvi0LiZDA\/hqdefault.jpg", "height":360, "width":480, "yt$name":"hqdefault" }, { "url":"http:\/\/i.ytimg.com\/vi\/xedvi0LiZDA\/1.jpg", "height":90, "width":120, "time":"00:00:51", "yt$name":"start" }, { "url":"http:\/\/i.ytimg.com\/vi\/xedvi0LiZDA\/2.jpg", "height":90, "width":120, "time":"00:01:42", "yt$name":"middle" }, { "url":"http:\/\/i.ytimg.com\/vi\/xedvi0LiZDA\/3.jpg", "height":90, "width":120, "time":"00:02:33", "yt$name":"end" } ], "media$title":{ "$t":"Drum & Bass - System - Circles", "type":"plain" }, "yt$aspectRatio":{ "$t":"widescreen" }, "yt$duration":{ "seconds":"204" }, "yt$uploaded":{ "$t":"2012-09-24T22:47:33.000Z" }, "yt$uploaderId":{ "$t":"UCvOGElQWhX8tyTxwzv1rKzg" }, "yt$videoid":{ "$t":"xedvi0LiZDA" } }, } 

我正在使用的Javascript如下：

  $.ajax({ url: 'api/video.php', success: function(data) { //$('.result').html(data); alert(data.media$group.yt$videoid.$t); } }); 

我得到的错误是： Uncaught TypeError：无法读取undefined的属性’yt $ videoid’

Answer 1

我需要将json响应解析为一个对象：

  var video = jQuery.parseJSON(data); alert(video['media$group']['yt$videoid']['$t']); //media$group.yt$videoid.$t