iPhone Tutorial: How to check iOS version in runtime (getting ready for iOS6)

I want to check if the iPhone the app is running on is running on iOS6 or a version below it.

1. Put this where all your constants and defines go:

#define IS_IOS5_OR_BELOW ([[[[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."] objectAtIndex:0] intValue] < 6)

2. Use this way:

if(IS_IOS5_OR_BELOW){

    // iOS 4-5 code

} else {

     // iOS 6 code

}

Hope this snippet can help you differentiating between version of iOS, mostly when iOS 6 is coming and you want to be ready for it :)