Optional protocol methods in Swift – onlinecode

Optional protocol methods in Swift – onlinecode

In this post we will give you information about Optional protocol methods in Swift – onlinecode. Hear we will give you detail about Optional protocol methods in Swift – onlinecodeAnd how to use it also give you demo for it if it is necessary.

In Swift it’s kind of unsupported to implemented optional protocol methods.

You can, which is ugly, use the @objc syntax:

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@objc protocol MyProtocol {
    optional func doSomething();
}

class MyClass : MyProtocol {
    // no error
}

Another disadvantage here is that structs are unsupported, as you’re bridging for Objc.

Architecting SwiftUI apps with MVC and MVVMAlthough you can create an app simply by throwing some code together, without best practices and a robust architecture, you’ll soon end up with unmanageable spaghetti code. Learn how to create solid and maintainable apps with fewer bugs using this free guide.

Using protocol extensions to create optional protocol methods

However, with Swift 2.0 it’s possible to define protocol extension. This allows you to create optional methods for your protocol easily:

protocol MyProtocol {
    func doSomethingNonOptionalMethod()
    func doSomethingOptionalMethod()
}

extension MyProtocol {
    func doSomethingOptionalMethod(){ 
        // leaving this empty 
    }
}

As stated in this thread, many people are asking this feature:
http://stackoverflow.com/questions/24032754/how-to-define-optional-methods-in-swift-protocol

 

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