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iOS Object-Oriented Swift Value vs Reference Types Final Challenge

Posted by Roland Shen
Roland Shen
7,628 Points

Stuck on the final exam challenge

Hi, could anyone help me out here? I'm not sure what I'm doing wrong. The compiler says that the second init needs an override or something

Vehicle.swift 
class Vehicle {
    let wheels: Int
    let doors: Int

    // Designated initializer
    init(wheels: Int, doors: Int) {
        self.wheels = wheels
        self.doors = doors
    }
}

class Car: Vehicle {
    // A car must default to 4 wheels and 4 doors
    init(wheels: Int, doors: Int) {
      super.init(wheels: 4, doors: 4)
    }
}
Chris Howie
Chris Howie
13,216 Points
Chris Howie
Chris Howie
13,216 Points

I had a hard time with this one as well.

So the first part that you have is correct in that you designated your intializer using self.

The final part you almost have, all you need to do is remove the values you place in the init. so you would just have: 

class Car: Vehicle {
    // A car must default to 4 wheels and 4 doors
    init(){
      // call super.init
      super.init(wheels: 4, doors: 4)
    }
}