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Customizing the alert shown by validate<Key>

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Customizing the alert shown by validate<Key>

Subject: Customizing the alert shown by validate<Key>
From: Kaspar Fischer <email@hidden>
Date: Tue, 11 Jan 2005 14:33:44 +0100

Hi All,

I have a text field whose value is bound to some controlled
string with key "text". In the model, I have the following
routine which validates the contents of the text field:

- (BOOL)validateText:(id *)ioValue error:(NSError **)outError
{
	if ([self currentCategory:*ioValue] >= 0)
		return YES;

	*outError = [NSError errorWithDomain:
		@"The text you entered is not a valid setting."
		code:0 userInfo:nil];
	return NO;
}

This works quite well expect that the alert which is shown
is very ugly: It says

  ALERT
  Error The text you entered is not a valid list setting. 0
  <Discard Changes> <OK>

I would prefer a nice, customized title (instead of ALERT)
and no "Error". Can one customize the alert? Maybe by filling
the above userInfo dictionary appropriately?

Thanks,
Kaspar

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