Compare Version String in iOS

compareVersion.mm

- (BOOL) isVersion:(NSString *)thisVersionString higherThan:(NSString *)thatVersionString {

    // LOWER
    if ([thisVersionString compare:thatVersionString options:NSNumericSearch] == NSOrderedAscending) {
        NSLog(@"%@ < %@", thisVersionString, thatVersionString);
        return NO;
    }

    // EQUAL
    if ([thisVersionString compare:thatVersionString options:NSNumericSearch] == NSOrderedSame) {
        NSLog(@"%@ == %@", thisVersionString, thatVersionString);
        return NO;
    }

    NSLog(@"%@ > %@", thisVersionString, thatVersionString);
    // HIGHER
    return YES;
}