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Updates "Properties can be added to existing classes" section.

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This commit is contained in:
Wojciech Nagrodzki 2015-04-12 20:36:31 +02:00
parent fab399def1
commit 34d085898b
Signed by: wnagrodzki
GPG key ID: E9D0EB0302264569
2 changed files with 1 additions and 6 deletions
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Cocoa Programming Guidelines.pdf
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Cocoa Programming Guidelines.tex
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@ -714,12 +714,7 @@ static void * const navigationItemKey = (void *)&navigationItemKey;
\begin{codelisting} \begin{codelisting}
- (UINavigationItem *)navigationItem - (UINavigationItem *)navigationItem
{ {
UINavigationItem * navigationItem = objc_getAssociatedObject(self, navigationItemKey); return objc_getAssociatedObject(self, navigationItemKey);
if (navigationItem == nil) {
navigationItem = [[UINavigationItem alloc] init];
self.navigationItem = navigationItem;
}
return navigationItem;
} }
\end{codelisting} \end{codelisting}