What is SwiftUI protocol?

Object-Oriented Programming (OOP) helps you structure your Swift code with so-called classes . These classes have properties and functions, and classes can inherit attributes from each other.22 Ara 2021

A protocol defines a blueprint of methods, properties, and other requirements that suit a particular task or piece of functionality . The protocol can then be adopted by a class, structure, or enumeration to provide an actual implementation of those requirements.

Object oriented programming languages such as Swift encourage the creation of classes to promote code reuse and the encapsulation of data within class instances.

Well, SwiftUI has a quite brilliant solution called environment objects. These are objects that our views can use freely, but don’t create or manage – they get created elsewhere, and carry on existing after the view has gone away .