Question

Below is how I am formatting my picker currently. I would really like it to show 1/8 instead of 2/16 or 1/2 instead of 8/16. How can I adjust this to show my desired output? Thank you!

fractionArray = [[NSMutableArray alloc] init];
for(int frac = 0; frac <= 15; frac ++){ 
    NSString *fracString = [NSString stringWithFormat:@"%d/16", frac];
    [fractionArray addObject:fracString]; // Add the string.

Answer 1

Kids these days… Euclidean algorithm… what are they teaching in school… grumble grumble…

int gcd(int a, int b) {
    // assumes a >= 0 && b > 0
    while (b != 0) {
        int t = a % b;
        a = b;
        b = t;
    }
    return a;
}

NSString *stringByReducingFraction(int a, int b) {
    if (a == 0) return @"0";
    if (a == b) return @"1";

    int g = gcd(a, b);
    return [NSString stringWithFormat:@"%d/%d", a / g, b / g];
}