Re: Delegate methods not working...
Re: Delegate methods not working...
- Subject: Re: Delegate methods not working...
- From: Ryan Bates <email@hidden>
- Date: Fri, 5 Mar 2004 21:36:39 -0800
It appears "control:textShouldEndEditing:" only gets called if the user
attempts to leave the text field *after* he has started editing the
text field. This means, if you edit the text, then erase it all and
attempt to leave, the delegate method will be called. I played around
with this quite a bit and can't find a decent work around. I searched
quite a few places and couldn't find a solution either.
There are other validation approaches that are more user-friendly and
basically accomplish the same thing - however, they may require a
little more code. For example: after the user hits the submit button,
you can report an error if any of the fields are blank. You could even
disable the submit button until a value has been entered for each field
(however, some people may get confused by that).
Ryan
On Mar 5, 2004, at 7:00 PM, James McConnell wrote:
Hey all, it's me again ;-). I have a doc based app with several text
fields. In IB, I've connected each NSTextField to File's Owner
(MyDocument), and set MyDocument as each fields delegate. In
MyDocument.m,
I've implemented the following method which checks the value of the
text
field. Everything compiles fine, but when I change text fields without
entering an value, I do not get the NSAlertPanel like I expect. Can
anyone
see anything wrong? I've searched the list archives as well as
cocoa.mamasam.com, and found nothing helpful.
<start code>
- (BOOL)control:(NSControl*)control
textShouldEndEditing:(NSText*)fieldEditor
{
if ([[control stringValue] isEqualToString:@""])
{
NSRunAlertPanel(@"Empty field", @"Please enter a value.",
@"OK",
nil, nil);
return NO;
}
[recipeController updateRecipe]; // simply updates a model object
return YES;
}
<end code>
Now, this is what was suggested by Ryan Bates in an earlier
conversation
(thanks again, Ryan!), but it's not working. I had this working with
notifications, but everytime a notification was fired for one text
field, it
would fire every notification for all the text fields. Besides, I need
notifications to do something else, and would like to get this to work
so I
can keep notifications for their other job. Thanks again for all the
help.
James
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