How to define initializers in a protocol extension?

Question

protocol Car {
     var wheels : Int { get set}

     init(wheels: Int)

}

extension Car {
    init(wheels: Int) {
        self.wheels = wheels
    }
}

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Answer 1

@Qbyte is correct.

In addition, you can take a look at my Configurable

In that I have Initable protocol

public protocol Initable {
    // To make init in protocol extension work
    init()
}

public extension Initable {
    public init(@noescape block: Self -> Void) {
        self.init()
        block(self)
    }
}

Then in order to conform to it

extension Robot: Initable { }

I have 2 ways, using final or implement init

final class Robot {
    var name: String?
    var cute = false
}

class Robot {
    var name: String?
    var cute = false

    required init() {

    }
}