以下是答案.

1. 该应用程序请求 http://itunes.apple.com/lookup?bundleId = com.clickgamer.AngryBirds
2. 在JSON响应中找到"version": "2.1.0"和"trackId": 343200656.

1. The app requests http://itunes.apple.com/lookup?bundleId=com.clickgamer.AngryBirds
2. Find the "version": "2.1.0" and "trackId": 343200656 in the JSON response.

警告:此API未记录，Apple可能会在不另行通知的情况下对其进行更改.

Warning: This API is undocumented, Apple could change it without notice.

参考:

[1] https://github.com/nicklockwood/iVersion/blob/master/iVersion/iVersion.m#L705
[2] https://***.com/a/8841636/41948
[3] http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZStoreServices.woa/wa/wsLookup?id=343200656&mt=8
[4]

[1] https://github.com/nicklockwood/iVersion/blob/master/iVersion/iVersion.m#L705
[2] https://***.com/a/8841636/41948
[3] http://ax.phobos.apple.com.edgesuite.net/WebObjects/MZStoreServices.woa/wa/wsLookup?id=343200656&mt=8
[4] http://itunes.apple.com/WebObjects/MZStoreServices.woa/ws/wsSearch?term=+Angry+Birds&country=US&media=software&entity=softwareDeveloper&limit=6&genreId=&version=2&output=json&callback=jsonp1343116626493