NSTextField input format

Question

There is an NSTextField field and you need to make it so that only numbers can be entered into it and that they look like this: "123-456-789"

This problem I solved NSNumberFormatter:

NSString *myString = @"12345678"; NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; [formatter setNumberStyle:NSNumberFormatterDecimalStyle]; [formatter setGroupingSeparator:@"-"]; [formatter setGroupingSize:3]; [formatter setMaximumIntegerDigits:9]; NSString *formattedOutput = [formatter stringFromNumber:[NSNumber numberWithInteger:[myString intValue]]];

But the problem is that the formatting takes place not on the right, but on the left, that is, we have:

"12-345-678",

but you need to be so: "123-456-78"

Accepted Answer · 2011-03-30T12:26:53

I don’t know how this should be implemented using NSNumberFormatter, but you can manually add a separator. Something like that:

 // field - поле ввода (NSTextField) NSMutableString *temp = [NSMutableString stringWithString:[field stringValue]]; int index=3; if ([temp length] <=3) { return; } while (index < [temp length]) { [temp insertString:@"-" atIndex:index]; index +=4; }

Well, if, of course, you can enter only 8 or 9 digits, then the previous solution is more convenient.

for complete happiness you need to cross here with this example. chamelo.co.uk/textfield-validation
here is my how I adapted it to my needs dl.dropbox.com/u/298332/trash/TextFormatter.zip

Alexey Naboichenko Alexey Naboichenko one · Answer 2 · 2012-02-15T15:34:44

You need to track character input using NSNotification and insert a "-" after every 3 characters. When you get focus, go through the text and delete "-" After the end of the input, you also go through and add "-"

angry 5,855 15 gold marks 57 silver marks 171 bronze marks · Answer 3 · 2011-03-30T09:58:42

Something I do not understand where the order is formed *** - *** - ** But logically, if *** - *** - ** => ** - *** - *** then you can do the opposite ** - *** - *** => *** - *** - ** and get what you need = ) PS: I’ll get to the computer later and try to figure it out

UPD.

 [numberFormatter setPositiveFormat:@"###-###-##"];

This sets the delimiter: [formatter setGroupingSeparator:@"-"];
This indicates how many digits in the group: [formatter setGroupingSize:3];

NSTextField input format

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