One Quickie

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Posting notifications. (Notifications->General)

In the header file:

extern NSString *BWStitchGroup_VisualAttributeChangeNotification;

In the .m file:

NSString *BWStitchGroup_VisualAttributeChangeNotification
    = @"BWStitchGroup Visual Attribute Change Notification";
...

NSNotificationCenter *center;
center = [NSNotificationCenter defaultCenter];

[center postNotificationName: 
            BWStitchGroup_VisualAttributeChangeNotification
        object: self];

If you want to pass a userinfo dictionary, you can use a variant method:

    NSDictionary *userInfo = ...;
    [center postNotificationName: BWStitchGroup_VisualAttributeChangeNotification
            object: self
            userInfo: userInfo];