I'm trying to declare properties that are for internal use only in a Private category as such:

@interface BarLayer (Private)

@property (readwrite, retain) MenuItemFont  *menuButton;
@property (readwrite, retain) Menu          *menuMenu;
@property (readwrite, retain) LabelAtlas    *messageLabel;

@end

Now I'm trying to figure out where exactly I'm supposed to @synthesize those.

I tried:

@implementation BarLayer (Private)

@synthesize menuButton      = _menuButton;
@synthesize menuMenu        = _menuMenu;
@synthesize messageLabel    = _messageLabel;

@end

Here, the compiler complains:

@synthesize not allowed in a category's implementation

So I tried putting it in my BarLayer implementation, but here it doesn't find the declarations in the BarLayer interface.

no declaration of property ‘menuButton’ found in the interface

What would the correct way be?

objective-c
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