How do I format a String to credit card format?

Question

What is the easiest way to format a string like "1234567890123456789" to "1234 5678 9012 3456 789" in iOS?

Answer 1

Try this:

-(NSString *) correctString:(NSString *) anyStr {
    NSMutableString *str = [NSMutableString stringWithString:anyStr];
    int indx=4;
    while (indx<str.length) {
        [str insertString:@" " atIndex:indx];
        indx +=5;
    }
    anyStr=str;
    return anyStr;
}