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iOS Object-Oriented Swift Classes in Swift Instances of Classes

aren polat
aren polat
883 Points
Posted by aren polat
aren polat
883 Points

init and class

I don't think i understood the init method right could someone give me explanation of what it does and why we need to use them. I watched the video a couple of times but i dont seem to understand it.

thank you

objects.swift 
// Enter your code below

class Shape {
var numberOfSides: Int

init() {
self.numberOfSides = numberOfSides
}
}

let someShape = numberOfSides

1 Answer

Brandon Mahoney
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Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points
Brandon Mahoney
.a{fill-rule:evenodd;}techdegree seal-36
Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points

So init is used to initialize the object i.e. assign it, its initial value. Below are two answers that are both accepted by the challenge. The first assigns a pre determined number of sides and the second uses a parameter in the init method which will be assigned later.

1 -

class Shape {
  var numberOfSides: Int

  init() {
    self.numberOfSides = 4
  }
}

let someShape = Shape()

2 -

class Shape {
  var numberOfSides: Int

  init(numberOfSides: Int) {
    self.numberOfSides = numberOfSides
  }
}

let someShape = Shape(numberOfSides: 4)