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

Raphael Varquez
Raphael Varquez
4,758 Points
Posted by Raphael Varquez
Raphael Varquez
4,758 Points

objects.swift answers plz

Don't know what's wrong with this code.

objects.swift 
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(latitude: Double, longitude: Double)
  }
}
let someBusiness: Business

1 Answer

Ghareisa Al-Kuwari
Ghareisa Al-Kuwari
1,465 Points
Ghareisa Al-Kuwari
Ghareisa Al-Kuwari
1,465 Points

In init, you should not create an instance of Location as it is supposed to be already created, then passed as an argument to init.

To understand the difference, if we do want to create an instance of Location in init, it should be

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

Then when creating an instance of Business, you should give values to the arguments of init which are name and location, and here we do create an instance of Location, which is then directly passed an an init argument of type Location

let someBusiness = Business(name: "Business name", location: Location(latitude: 133.55, longitude: 23.2) )

The whole code should be 

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: "Business name", location: Location(latitude: 133.55, longitude: 23.2) )