Composite Components Edit on GitHub

Avoid subclassing CKComponent directly. Instead, subclass CKCompositeComponent.

A “composite component” simply wraps another component, hiding its implementation details from the outside world.

For example, imagine you’re implementing a button to share an article in a newsreader app. You could implement ShareButtonComponent as a composite component that wraps a CKButtonComponent:

@implementation ShareButtonComponent

+ (instancetype)newWithArticle:(ArticleModel *)article
  return [super newWithComponent:

- (void)shareTapped
  // Share the article


Never Subclass Components contains more information about why you should favor subclassing CKCompositeComponent whenever posible.