Understanding protocols in Swift

In 2015, Apple introduced Swift as a protocol-oriented programming language, marking a departure from the object-oriented Objective-C. Swift's protocol paradigm allows developers to create objects without the need for inheritance, enabling the use of these objects in existing code and allowing a single class to work with multiple protocols. Protocols in Swift serve as blueprints that classes, structs, or enums can follow, defining methods and values for communication between unrelated objects. This approach provides advantages like code clarity, reusability through protocol extensions, and separation of classes, as it eliminates dependency through inheritance. Examples in the text illustrate how protocols can be applied to model systems more efficiently, offering a structure where methods and properties can be grouped and reused, ultimately leading to more maintainable and scalable code.