Check iOS version at runtime?

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Simpler solution for anyone who’ll need help in the future:

NSArray *versionCompatibility = [[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."];

if ( 5 == [[versionCompatibility objectAtIndex:0] intValue] ) { /// iOS5 is installed

    // Put iOS-5 code here

} else { /// iOS4 is installed

    // Put iOS-4 code here         

}

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