> We really recommend looking at the approach I described earlier using
> NSFormatter subclass for input validation.
Unfortunately, I am not actually formatting or validating anything so
this isn't helpful for me. I am working on a middle-layer framework
and what I am interested in is the text change notification with
enough information about how the string just changed.
shouldChangeTextInRange:replacementString: provides me the level of
detail I am interested in.
> All NSControl subclass hosting a field editor is a text view delegate.
> You can simply override the delegate method with your custom NSTextField
> subclass.
> For example,
>
> - (BOOL)textView:(NSTextView *)aTextView
> shouldChangeTextInRange:(NSRange)aRange replacementString:(NSString
> *)aString {
> if ([super textView:aTextView shouldChangeTextInRange:aRange
> replacementString:aString]) {
> id delegate = [self delegate];
> if ([delegate
> respondsToSelector:@selector(textView:shouldChangeTextInRange:replacementString:)])
> return [delegate textView:aTextView shouldChangeTextInRange:aRange
> replacementString:aString];
> return YES;
> }
>
> return NO;
> }
>
> should give you essentially what you want.
Drat, this was the first thing I tried and I never got the callback
which is why I went down the whole field handler path. I just tried it
again, and it just worked.
I'm still a bit confused/overwhelmed by this whole thing, like how the
delegate can call [super textView:aTextView
shouldChangeTextInRange:aRange replacementString:aString]). The
delegate isn't necessarily a subclass of NSTextView, right?
Also, for the record, I figured out why my DidBegin callback didn't
fire. I forgot to call super in my
shouldChangeTextInRange:replacementString: method of my subclass of
NSTextView for the field handler.
But regardless, I'm deleting all my field handler stuff and just going
with the delegate now that it works for me.
Thanks,
Eric
--
Beginning iPhone Games Development
http://playcontrol.net/iphonegamebook/
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