What is the difference between a Class and a Singleton in Objective-C?

You are programming in Objective-C, an Object-oriented programming language (OOP). So, to know what a class is, you must first understand OOP concepts.

In every programming language I've heard of, a singleton is a design pattern which dictates that only a single instance exists for a given class - whereas in a normal class, many instances of it can be created.

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