1）他们可能使用企业分发密钥签名，在这种情况下他们违反Apple协议。否则，他们在AppStore上有一个应用程序，他们通过iTunes下载IPA并放在他们的网站上。

1) They may signed it with enterprise distribution key and in such case they are violating Apple agreement. Otherwise, they have an app on AppStore and they downloaded IPA through iTunes and put on their website.

结果，他们签署了IPA（基于企业或appstore），这将是在任何非越狱设备上工作。

As result, they have signed IPA (enterprise or appstore based) which will work on any non jailbroken device.

2）第二部分是企业分配机制。一般来说，您所做的是准备企业分发清单（xml plist），它指向ipa文件和其他资源（作为示例图标）。然后创建一个带有此清单链接的按钮。链接应如下所示：

2) Second part is enterprise distribution mechanism. Generally speaking, what you do is your prepare enterprise distribution manifest (xml plist) which points to ipa files and other resources (as example icons). And you create a button with the link to this manifest. Link should look like that:

<a href="itms-services://?action=download-manifest&url=<URL to Manifest>">Some text here</a>

关于无线电通讯的其他一些有用的链接：

Couple of additional useful links regarding over the air distribution:

http：/ /aaronparecki.com/articles/2011/01/21/1/how-to-distribute-your-ios-apps-over-the-air

http://gknops.github.io/adHocGenerate/