objective c - Format string, integer with leading zeros

Question

I want to convert an integer value to a string with leading zeroes (if necessary) such that the string has 3 total characters. For example, 5 would become "005", and 10 would become "010".

I've tried this code:

NSString* strName = [NSString stringWithFormat:@"img_00%d.jpg", i];

This partially works, but if i has the value of 10, for example, the result is img_0010.jpg, not img_010.jpg.

Is there a way to do what I want?

Answer 1

Use the format string "img_%03d.jpg" to get decimal numbers with three digits and leading zeros.