Answering my own question:
Read the documentation on:
- (BOOL)control:(NSControl *)control textShouldEndEditing:(NSText *)fieldEditor
Cheers,
Andre Masse
On 16/08/2011, at 12:21 , Andre Masse wrote:
> Hi,
>
> I need to validate input when the user enters data on a particular cell (caseNumber) in a table view. Not using coredata but data is stored in a Postgresql database. Here's what I need to ensure:
>
> 1- only digits
> 2- dont already exists in the database
> 3- dont already exists in the tableview's datasource
> 4- need to stay on the cell until valid data is entered.
>
> 1- easily done use key-value validation (validateCaseNumber:error:)
> 2- could be done using key-value validation but this imply opening a new database connection (already have one open in master/detail model)
> 3- this cant be done using key-value validation (no access to the array)
>
> I'm currently using this in a tableview delegate:
>
> - (BOOL)control:(NSControl *)control isValidObject:(id)obj
>
> Which is working fine except that I haven't found a way to customize the error string when returning NO in the above method. Am I missing something obvious?
>
> Thanks,
>
> Andre Masse
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