Get iOS system version as float

iOSVersion.m

+(float)systemVersion
{
    NSArray * versionCompatibility = [[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."];
    float total = 0;
    int pot = 0;
    for (NSNumber * number in versionCompatibility)
    {
        total += number.intValue * powf(10, pot);
        pot--;
    }
    return total;
}