Tuning KVO validation.
Tuning KVO validation.
- Subject: Tuning KVO validation.
- From: Óscar Morales Vivó <email@hidden>
- Date: Wed, 25 Feb 2004 12:17:53 +0100
I've been hacking my small measure unit conversion utility I built to
learn about controllers and KVO. You can download it (the project
itself) at
http://homepage.mac.com/oscarmv/iMigrate.sitx
Last thing I did was adding validation to some values that had to be
between 0 and 12. It works fine, but the behaviour of the application
isn't exactly what I'd like. Being that the docs on that part are
either incomplete or too hard to find, I'd like to ask some kind soul
on the list to give me a hand.
Right now, those keys that go through validation work find, but the
related text fields allow for inputting any number. It just doesn't go
into the model and displays a message when exiting the field. For those
that download the app, they are the lengthRemainingInches and
weightRemainingOunces model properties.
What I want is for a bad validation to make the computer beep and
revert the UI to its previous value, but I don't know how to go about
it properly (i.e. not in model code itself as that would be bad style).
Any help will be appreciated.
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.