Answer Posted / Prabhat Jageshwari
Design patterns in iOS are reusable solutions to common software design problems. Some popular design patterns used in iOS include: Singleton (ensures a class has only one instance), Delegate (allows two objects to communicate), Factory (creates objects without specifying the exact class of object that will be created), Observer (one-to-many dependency between objects), and Model-View-Controller (separates an application into three interconnected components: model, view, and controller).
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