Re: How to get iOS version at runtime?
Re: How to get iOS version at runtime?
- Subject: Re: How to get iOS version at runtime?
- From: Roland King <email@hidden>
- Date: Fri, 18 Jul 2014 21:30:18 +0800
> On 18 Jul 2014, at 3:40 pm, Gerriet M. Denkmann <email@hidden> wrote:
>
> How to get iOS version at runtime?
>
> Like:
>
> BOOL isRunningOnDeviceOrSimulatorInVersion8 = ???
>
> I seem to have asked this question before (about OS X) and was told to use either NSAppKitVersionNumber or NSFoundationVersionNumber.
>
> iOS obviously has no NSAppKitVersionNumber, but I cannot find a UIKitVersionNumber.
>
> The stuff which behaves differently in 7.1.2 versus 8.0 is UIKeyboardWillChangeFrameNotification, which looks more like UIKit.
> Should I use NSFoundationVersionNumber anyway or what?
>
> And: does the Simulator return the NSFoundationVersionNumber of the simulated iOS (8.0) or the machine it is running on (10.9.4)?
>
> ProcessInfo has operatingSystemVersionString which is documented as "not appropriate for parsing".
>
> Gerriet.
>
The easy answer is you’re not supposed to do it because it’s fragile and guaranteed to break.
You’re also not supposed to have to do it.
I wish I could ever remember how compatibility is meant to work. If you build for minimum target 7 but run on 8, isn’t the API your code ‘sees’ supposed to be ‘compatible with 7’ or is it allowed to give you a UIKeyboardWillChangeFrameNotification which looks like iOS8? That could just be a bug.
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