Swift prototype design sample – The.Swift.Dev.

This can also be a creational design sample, it’s helpful when you could have a really primary configuration for an object and you would like to present (clone) these predefined values to a different one. Mainly you are making clones from a prototype objects. 😊😊😊

This strategy has some advantages, one is for instance that you do not have to subclass, however you possibly can configure clones individually. This additionally means that you could take away a bunch of boilerplate (configuration) code if you’ll use prototypes. 🤔

class Paragraph {

    var font: UIFont
    var colour: UIColor
    var textual content: String

    init(font: UIFont = UIFont.systemFont(ofSize: 12),
         colour: UIColor = .darkText,
         textual content: String = "") {

        self.font = font
        self.colour = colour
        self.textual content = textual content
    }

    func clone() -> Paragraph {
        return Paragraph(font: self.font, colour: self.colour, textual content: self.textual content)
    }
}

let base = Paragraph()

let title = base.clone()
title.font = UIFont.systemFont(ofSize: 18)
title.textual content = "That is the title"

let first = base.clone()
first.textual content = "That is the primary paragraph"

let second = base.clone()
second.textual content = "That is the second paragraph"

As you possibly can see the implementation is only a few traces of code. You solely want a default initializer and a clone methodology. The whole lot will probably be pre-configured for the prototype object within the init methodology and you can also make your clones utilizing the clone methodology, however that is fairly apparent at this level… 🤐

Let’s check out another instance:

class Paragraph {

    var font: UIFont
    var colour: UIColor
    var textual content: String

    init(font: UIFont = UIFont.systemFont(ofSize: 12),
         colour: UIColor = .darkText,
         textual content: String = "") {

        self.font = font
        self.colour = colour
        self.textual content = textual content
    }

    func clone() -> Paragraph {
        return Paragraph(font: self.font, colour: self.colour, textual content: self.textual content)
    }
}

let base = Paragraph()

let title = base.clone()
title.font = UIFont.systemFont(ofSize: 18)
title.textual content = "That is the title"

let first = base.clone()
first.textual content = "That is the primary paragraph"

let second = base.clone()
second.textual content = "That is the second paragraph"

The prototype design sample can also be useful in case you are planning to have snapshots of a given state. For instance in a drawing app, you could possibly have a form class as a proto, you can begin including paths to it, and sooner or later at time you could possibly create a snapshot from it. You possibly can proceed to work on the brand new object, however this offers you the flexibility to return to a saved state at any level of time sooner or later. 🎉

That is it in regards to the prototype design sample in Swift, in a nuthsell. 🐿