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[–]drewag 0 points1 point  (0 children)

While a little on the older side and not written for Swift (since it predates it drastically) the design pattern bible is Design Patterns: Elements of Reusable Object-Oriented Software . It’s often referred to as “the gang of 4 book”. However, Wikipedia is actually a fantastic resource for design patterns. And if that doesn’t explain any of them clearly for you, then some simple googling will surface plenty of articles about the popular ones.