I'm familiarizing myself with Xcode 4.2.1 under Lion 10.7.2 so am doing the
"Your First Mac App" tutorial.
This code snippet from the tutorial is incorrect and causes an error in
compilation.
if (sender == textField) { senderName = @"textField"; }…….
The error is "Use of undeclared identifier 'textField'; did you mean
_textField?"
The correct code is:
if (sender == self.textField){senderName = @"textField"; }
In fact if you refer to any of the synthesized iVars such as 'window' or
'slider'
or indeed any that you care to make up for yourself (eg aardvark) the same
issue occurs.
I don't know if this is a scope, language or compiler issue.
Why would one need to use self.textField?
The tutorial is in Mac OS X 10.7 Core Library > General > Your First Mac App >
Make Connections > Check your Progress > To add log statements >
3 Implement the takeFloatValueForVolumeFrom: method as follows:
I've sent feedback to the document maintainers.
In fact the final code at the end of the tutorial does not contain that code
but is far simpler.
Nevertheless the code needs correction for the sake of newcomers.
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