How to calculate number of digits after floating point in iOS?

Question

How can I calculate the number of digits after the floating point in iOS?

For example:

• 3.105 should return 3
• 3.0 should return 0
• 2.2 shou

Answer 1

What I used is the following:

NSString *priorityString = [[NSNumber numberWithFloat:self.priority] stringValue];
    NSRange range = [priorityString rangeOfString:@"."];
    int digits;
    if (range.location != NSNotFound) {
        priorityString = [priorityString substringFromIndex:range.location + 1];
        digits = [priorityString length];
    } else {
        range = [priorityString rangeOfString:@"e-"];
        if (range.location != NSNotFound) {
            priorityString = [priorityString substringFromIndex:range.location + 2];
            digits = [priorityString intValue];
        } else {
            digits = 0;
        }
    }