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iOS Object-Oriented Swift 2.0 Classes Classes with Custom Types

Geovanny Reyes
Geovanny Reyes
3,876 Points
Posted by Geovanny Reyes
Geovanny Reyes
3,876 Points

Could I get help with this code? I would appreciate it

I don't know exactly how to build the initializer.

classes.swift 
struct Location {
    let latitude: Double
    let longitude: Double

class Business {
  let name: String
  let location: Location

 init(latitude: Double, longitude: Double) {
 self.name = "Geo"
 self.location = Location(latitude: 2.0, longitude: 3.5)

   }
 }
}
let someBusiness = Location(latitude: 2.0, longitude: 3.5)

3 Answers

Jennifer Nordell
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STAFF
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Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
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Jennifer Nordell
Treehouse Teacher

Ok there are a few issues here. First, your class definition shouldn't be defined inside your struct. Your struct doesn't end before the Class definition begins. Secondly the init is going to take a type of String and a type of Location, which you just created. Third, we're not going to hard-code the initial values of the class. Instead we're going to send the values that we want to initialize at the time we create the instance of our Business. So in the creation of the business we will send in a string for the name, and a Location with the latitude and longitude that we specify. Take a look at my solution (which is really just your code edited) to see how we do this.

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: "Geo",location: Location(latitude: 2.0, longitude: 3.5))
Geovanny Reyes
Geovanny Reyes
3,876 Points
Geovanny Reyes
Geovanny Reyes
3,876 Points

Thank you Jennifer for your help! I hope you don't mind if I ask two more questions... 1. so the class is always outside the struct? {} ... 2. when we declare a init, we don't put any values on it, meaning, like I did when I wrote "Geo" and the numbers? thank you very much!

Jennifer Nordell
seal-mask
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

As I understand it you can place a class definition inside a struct. But I've not yet run into a case where this is necessary. There might be instances when you will want to hard-code the init values of some class, but again I can't think of any. Keep in mind though that I'm also a student! :) Hint: I've yet to run into a challenge where either one of those are required, but you may make it further than I have!

Geovanny Reyes
Geovanny Reyes
3,876 Points
Geovanny Reyes
Geovanny Reyes
3,876 Points

That helps a lot! Gracias!