Try this Swift code in a Playground and observe what is compiler is complaining about.
protocol RoastCoffee {
func roastingComplete(with smellsGood: Bool = true) //Error: Default argument not allowed in protocols
}
Seen this error ? I bet yes if you have done any basic Swift coding at all.
Ever wondered why Swift compiler complains about this, or you just didn't care as long as you can move the property back to the class itself from the extension and be done with it ? Yes, that is one way to do it, but not the best way to do it.
The following code (also given in the above image) will surely throw the error at your face.
protocol ProtocolWithSyntaxErrors {
This is the part 2 of the Swift Protocol Oriented Programming series, the first part was an introduction to Protocols compared to Java Interfaces and some of the basic characteristics of both compared in one-to-one manner. However as a developer, the more important questions are asked when and how we can use POP design pattern in our day to day coding.
This is the first part of a multiple part series of Protocol Oriented Programming with Swift (Actually Only with Swift, if you know any other programming language which supports Protocol Oriented Programming, please be kind enough to comment below). Let's first try to understand what the heck is a Protocol in Swift/iOS App development context. May be we should start from somewhere most of us are familiar with, at least the people who are familiar with Java (if not, you are missing a lot), yes the most popular programming language in the world.