Re: Validate a user entry
Re: Validate a user entry
- Subject: Re: Validate a user entry
- From: "Craig S. Cottingham" <email@hidden>
- Date: Wed, 19 Dec 2001 08:33:51 -0600
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On Tuesday, December 18, 2001, at 10:58 , Michhle Garoche wrote:
In Travel Advisor in Learning Cocoa, there is a field
validation implemented as follow:
...
It works only (not surprisingly) when the user enters a value
in the field.
Should I implement a second method so that it works also when
the user tabs through the field without entering a value.
Which method and how to implement it ?
And a third one when the user adds the record (in case he did
not even go into the field). Again which method and how to
implement it.
In my opinion, validation of user input should be performed
most, if not all, of the time on commit only. Users should be
free to noodle around in the input form as much as they want,
until they are ready to change the state of the data. Validation
on field exit forces the user to stop thinking about whatever it
was he or she was thinking about and pay attention to the
application.
Just my two cents.
- --
Craig S. Cottingham
email@hidden
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