On Feb 22, 2008, at 12:03 AM, Chris Schmitt wrote:
I am sure this is easy and I am just missing something, but I want
to bind my integer attribute to an NSTextField. The data is
displayed correctly, but after I update the value in the text field
and try to save the changes back to my model. I get an error saying
that the update failed trying to set the integer value to a string
value.
I have been searching for a while and I think I need to use a number
formatter, but it would seem that there is an easier way to do this.
On a side note, what is the best way to make sure only numbers are
typed into the text field?
Using a number formatter is the easiest way to accomplish both of
these tasks. In Interface Builder, simply drag a NumberFormatter from
the Library pane onto your text field and voila, it's formatted as a
number, and it won't let the user enter anything but numbers into the
text field. When you select the text field in the IB, you'll see a
small $ icon which represents the NumberFormatter. Clicking on it and
going to the Attributes tab in the Inspector will let you configure
the formatter.
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