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Is there any statistics on what propotion of iOS-device is running iOS5?

I'm gonna developing a iOS App and I need to know that in order to decide do I support iOS4. (I want to use Storyboard and ARC)

Jimmy
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  • ARC is supported in iOS4. If you have to support storyboards though, then you're right in that you won't be able to support iOS4. –  Feb 14 '12 at 03:28
  • weak reference is not supported in iOS4. – Jimmy Feb 14 '12 at 03:32
  • Zeroing weak references aren't, but an `__unsafe_unretained` variable acts like a weak reference. See [this question/answer](http://stackoverflow.com/questions/7246513/zeroing-weak-references-in-arc) for more info. –  Feb 14 '12 at 03:34
  • It doesn't act anything like a zeroing-weak reference, except in that it won't leak. Aside from that, they're absolutely nothing alike. – Jason Coco Feb 14 '12 at 04:01

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Based on these statistics:

  • iOS 5 is not much more than 50% (since that data is a few months old now)
  • iOS 4 is the vast majority of remaining devices

So I wouldn't lock yourself into iOS5-only development at this time.