Question

My question is related to the iphone appstore deployment handles deployment for when different versions of the iphone request the application. Also, does one have to submit a build for each version i.e 2.0,2.1 and 2.2. I’ve developed for Windows mobile and redirected users to a certain url based on the windows mobile platform they were using. There they would simply download and run a cab file.

Just trying to get my head around how the App Store deployment process works.

Answer 1

You can use the latest SDK (e.g. 2.2.1) to target phones of any earlier OS, as long as you don’t use an API that is only available on a later OS.

target OS   app generally works on ---------   ---------------------- 2.0         2.2.1, 2.2, 2.1, 2.0 2.1         2.2.1, 2.2, 2.1 2.2         2.2.1, 2.2 2.2.1       2.2.1 

HOWEVER, if you use an API that doesn’t exist on an earlier phone OS, then it won’t work. For example the APIs on this page won’t work on OS 2.1 (You need to login to see the contents of that page.): http://developer.apple.com/iphone/library/releasenotes/Miscellaneous/iPhone22APIDiffs/iPhone21_iPhone22_APIDiffs.html