iPhone OS 4.0 backwards compatible with 3.1/.2

Posted by Typeoneerror on Stack Overflow See other posts from Stack Overflow or by Typeoneerror
Published on 2010-05-30T23:37:06Z Indexed on 2010/05/30 23:42 UTC
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iphone

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iphone-sdk

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iphone-os-4.0

Title says it all. I'm building an iPhone application with a base SDK target of 3.1.x. I've got a friend who offered to test it on the OS 4.0 beta, but I'm wondering in advance if I should bother. Will my application run under 4.0 or is it not backwards compatible? I have to imagine it will since apps built for 2.x run on 3.x just fine AFAIK. Any gotchas?

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