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I have an iOS 4 app I developed 4 years ago that needs to run all iOS versions from 4 to 8. What is the best way to go about that. All I can think of is just go through all compiler failures and fix them while if I use any feature not present in iOS 4 I have to to do if else condition for using the feature/class etc.

Is there anything else I need to worry about?

I read this question and it is helpful but I am wondering what else. Is it possible to create an app iOS 4 - iOS 7 compatible with Xcode 5.0.2 on Mavericks?

Vadim Kotov
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Hassan Hussein
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  • depending on how complex the application is, I would recommend to rewrite it instead of patching up from iOS4 – but the question is which way would be more cost-efficient for you in long term. – holex Oct 13 '14 at 14:44
  • Actually when I opened it on Xcode 5 I didn't have to do anything except relinking one library and fiddling with architectures, base SDK and deployment target. It now runs on all devices from iOS 4.3.3 to 8.0.2 – Hassan Hussein Oct 15 '14 at 12:18

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