ios4 - Build iPhone App for multiple devices and versions -

February 15, 2010

I'm trying to upgrade my iPhone app from 3.0 to 4.0

Some API 4.0 I dislike it, if I use the new API, then it will not do the right thing at 3.0? So I need an old API and new API

What is the best way to code for 3.0 and 4.0 for all the developers?

I know that I can check for the system and systems from the UIID device.

Which version do I need to check first and which device to check?

  If SystemWarson == 3.0 {// Old API code is here} If System Virus == 4.0 {if device == is the new API code for iPhone 3G / 3G then device = = New API code for iPhone 3GS / 3G if device == New API code for iPhone 4/4 4}

  
  Look at Matt Gallagher, if you are an iPhone Dev, check at least one session that talks about it.


















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