Protocols in Swift
Protocols are extremely important in Swift
A protocol allows objects, and provide a concrete implementation of any object that conforms to it. We can think of a protocol as a set of rules and guidelines that an object can conform to
For the examples, read on.
Difficulty: Beginner | Easy | Normal | Challenging
Prerequisites:
- Be able to produce a “Hello, World!” iOS application (guide HERE)
- Use of extensions (guide HERE)
- Some knowledge of Object-oriented programming, specifically overriding (guide HERE)
Terminology
class: An object defined in Swift, using pass by reference semantics
conforms: conformance is if an object adopts a protocol (or inherits it from another class) and contains the functionality specified
enum: A type consisting of a set of named values, called members
extensions: Extensions add new functionality to a class, struct, enum or protocol
inheritance: The mechanism in which one class acquires the property of another class
method: A group of statements that together can perform a function
