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Swift 2 Design Patterns by Julien Lange

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Chapter 1. Creational Patterns

The creational patterns are designed to deal with the object creation mechanism in software designing. A system using these patterns becomes independent of how objects are created, which means it is independent of how concrete classes are instantiated.

These patterns encapsulate the use of concrete classes and favor the use of interfaces in the relationship between objects, allowing to have better abstraction of the global system conception.

Thus, if we analyze the singleton pattern, a pattern designed to instantiate only one instance of a class, we find that the mechanism that controls the unique access to this instance is fully encapsulated in the class, which means that this is completely transparent to the client ...

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