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iOS Object-Oriented Swift Classes in Swift Classes with Custom Types

Tariq Qazzaz
Tariq Qazzaz
1,660 Points

my initialization is not working .

hi guys .. i followed the steps in the last lesson to create explicit initialization

but its not working

objects.swift
struct Location {
  let latitude: Double
  let longitude: Double
}
class Business {

     let name : String 
     let location : Location 

  init(name: String , latitude: Double , longitude: Double){

    self.name = name 
    self.location = (latitude : latitude , longitude :  longitude)

  }
}
let someBusiness = Business(name : "treehouse" , latitude : 10.0 , longitude : 20.0) 

1 Answer

Hi Tariq,

Remember location is of type Location. This means that in this code challenge you are essentially creating two instances in 'someBusiness' to initialise both of the classes.

struct Location {
  let latitude: Double
  let longitude: Double
}

class Business {
  let name: String
  let location: Location

  init(name: String, location: Location) {
    self.name = name
    self.location = location
  }
}

let someBusiness = Business(name: "London", location: Location(latitude: 51.5074, longitude: 0.1278))

You could also create a separate instance of Location and assign this constant to location:

let someLocation = Location(latitude: 51.5057, longitude: 0.1278)
let someBusiness = Business(name: "London", location: someLocation)

I hope this helps.

All the best,

Mitch