Different ways to check iOS version?

Question

I've seen various methods of checking the iOS version of the device.

From some example in Apple Documentation :

if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) {
    // < = 6.1
} else {
    // > = 7
}

And from many examples over SO / Internet :

[[UIDevice currentDevice] systemVersion]

What is the difference between NSFoundationVersionNumber and [[UIDevice currentDevice] systemVersion] ?

And which one should we use ?

This answer will cover all of your questions: http://stackoverflow.com/a/7848772/1091539 — Mutawe, Nov 19 '13 at 07:15
http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7/18929980#18929980 — Rajneesh071, Nov 19 '13 at 07:35

score 3 · Accepted Answer · answered Nov 19 '13 at 07:13

3

They basically provide the same answer, however, NSFoundationVersionNumber is better, as no string parsing of the systemVersion is needed.

answered Nov 19 '13 at 07:13

Albara

My SDKs only include `NSFoundationVersionNumber` and `NAAppKitVersionNumber` only to iOS 7.1 and Mac OS 10.9.2. I navigated to the 8.1 resp. 10.10 SDK --> Frameworks --> Foundation --> NSObjcRuntime.h – Julian F. Weinert Jan 20 '15 at 13:03

1 Answers1