苹果提供了REST接口，可以查询出指定appID的所有信息，例如我们请求【腾讯新闻】：
http://itunes.apple.com/lookup?id=399363156
返回json结构如下：
{
"resultCount":1,
"results": [
{
"kind":"software",
"features":[],
"supportedDevices":[
"iPhone-3GS",
"iPhone5c",
"iPad23G",
"iPhone5",
"iPadWifi",
"iPad3G",
"iPadMini",
"iPadFourthGen4G",
"iPodTouchFifthGen",
"iPadFourthGen",
"iPodTouchourthGen",
"iPhone4S",
"iPodTouchThirdGen",
"iPadThirdGen4G",
"iPad2Wifi",
"iPadThirdGen",
"iPhone4",
"iPadMini4G",
"iPhone5s"
],
"isGameCenterEnabled":false,
"screenshotUrls":[
"http://a2.mzstatic.com/us/r30/Purple6/v4/be/41/a5/be41a5ec-dd67-cae9-8f06-1693bd4ec41a/screen1136x1136.jpeg",
"http://a1.mzstatic.com/us/r30/Purple4/v4/aa/23/73/aa23739a-b53c-45ab-6535-51da342931c8/screen1136x1136.jpeg",
"http://a5.mzstatic.com/us/r30/Purple/v4/4e/64/6f/4e646f42-7799-21b8-24ec-afa46d07fcd5/screen1136x1136.jpeg",
"http://a4.mzstatic.com/us/r30/Purple2/v4/21/fe/10/21fe1009-794c-96b8-892a-0aa9cac33689/screen1136x1136.jpeg",
"http://a5.mzstatic.com/us/r30/Purple2/v4/f4/49/b2/f449b224-e561-f45d-cd42-018e8fd0e39d/screen1136x1136.jpeg"
],
"ipadScreenshotUrls":[],
"artworkUrl60":"http://a1726.phobos.apple.com/us/r30/Purple6/v4/fb/38/62/fb3862a2-fa88-f006-b46a-ebd4efefc1df/Icon.png",
"artworkUrl512":"http://a448.phobos.apple.com/us/r30/Purple6/v4/f6/dc/f6/f6dcf695-f20b-f287-6269-79c435ded984/mzl.ohdmoqti.png",
"artistViewUrl":"https://itunes.apple.com/us/artist/tencent-technology-beijing/id542280115?uo=4",
"artistId":542280115,
"artistName":"Tencent Technology (Beijing) Company Limited",
"price":0.00,
"version":"4.0",
"description":"腾讯新闻是腾讯团队用心打造的一款丰富、及时的新闻应用，本着精炼、轻便的目标，为用户提供高效、优质的阅读体验。全球视野，聚焦中国，一朝在手，博览天下。\n\n1.每日新闻及时报道，洞察真相，领先一步\n\n2.媒体订阅，全面接入优质媒体/微信自媒体，一处订阅，多处可看\n\n3.云收藏，便捷收藏、随时访问、永久保存\n\n4.视频、图片、直播，多媒体资讯，舒适体验，值得拥有\n\n5.专题新闻，聚合报道重要新闻事件，了解事件全貌\n\n6.离线下载智能启动，30秒下载1000条新闻，没有网络也有得看\n\n7.横划手势切换2级栏目，单手操作更方便\n\n8.两种阅读模式，2G/3G/wifi环境顺畅浏览\n\n9.腾讯微博、QQ空间、微信朋友圈、新浪微博、微信好友、手机QQ好友、邮件，随时与好友分享态度",
"currency":"USD",
"genres":[
"News",
"Social Networking"
],
"genreIds":[
"6009",
"6005"
],
"releaseDate":"2010-10-23T19:24:21Z",
"sellerName":"Tencent Technology (Beijing) Company Limited",
"bundleId":"com.tencent.info",
"trackId":399363156,
"trackName":"腾讯新闻",
"primaryGenreName":"News",
"primaryGenreId":6009,
"releaseNotes":"版本4.0新功能：\n1、阅读更加智能，你关心的尽在眼前\n2、新增创意截屏功能，快来给新闻盖个戳吧",
"formattedPrice":"Free",
"wrapperType":"software",
"trackCensoredName":"腾讯新闻",
"languageCodesISO2A":[
"ZH"
],
"fileSizeBytes":"17397447",
"sellerUrl":"http://news.qq.com",
"contentAdvisoryRating":"12+",
"averageUserRatingForCurrentVersion":5.0,
"userRatingCountForCurrentVersion":8,
"artworkUrl100":"http://a448.phobos.apple.com/us/r30/Purple6/v4/f6/dc/f6/f6dcf695-f20b-f287-6269-79c435ded984/mzl.ohdmoqti.png",
"trackViewUrl":"https://itunes.apple.com/us/app/teng-xun-xin-wen/id399363156?mt=8&uo=4",
"trackContentRating":"12+",
"averageUserRating":4.0,
"userRatingCount":448
}]
}
