Categories in Objective-C aren't working

Question

I\'m developing an iOS application that needs to deploy to iOS 3.1.3. I need to extend some of the functionality of the NSData class and am using the following code inside N

Answer 1

There is a great post on The Carbon Emitter about about handling categories in iOS. It details an easy way to handle importing categories to your project.

Make a file containing all of your category imports, in this example it is Extensions.h:

#import "NSDate+Formatting.h"
#import "UIFonts+MyFonts.h"
#import "UIViewController+Tourbot.h"

Add import your file in AppName-Prefix.pch:

#import 

#ifndef __IPHONE_3_0
#warning "This project uses features only available in iPhone SDK 3.0 and later."
#endif

#ifdef __OBJC__
#import 
#import 
#import 
#import 
#import "Extensions.h" // Add import here
#endif