NSTextField with number formatter does not accept padding character only

Question

I have a NSTextField with a number formatter set this way:

NSNumberFormatter *myFormatter = [[NSNumberFormatter alloc] init];

[myFormatter setFormatWidth:7];
[myFormatter setPaddingCharacter:@"0"];
[myFormatter setMinimumSignificantDigits:0];

[myFormatter setMinimum:[NSNumber numberWithInteger:0]];
[myFormatter setMaximum:[NSNumber numberWithInteger:9999999]];
[myClientIDTextField setFormatter:myFormatter];

Everything works as expected, but I cannot input "0" or "00" or "000" and so on in the textfield, if I do a sheet appears on the window, saying that my input was invalid. My expected behaviour would be that inputting "0" should be validated as "0000000". Does anybody have a clue of why this is happening and how to solve this ?

Thanks

Answer 1

If you specify the format as @"0000000", then it requires 7 digits and will fill in 0s where a digit doesn't exist.

NSNumberFormatter *myFormatter = [[NSNumberFormatter alloc] init];
[myFormatter setFormat:@"0000000"];
[myFormatter setMinimum:@0];
[myFormatter setMaximum:@9999999];
[myClientIDTextField setFormatter:myFormatter];

Hope that helps.