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iOS Object-Oriented Swift 2.0 Classes Classes with Custom Types

Posted by Nick Singleton
Nick Singleton
1,806 Points

I don't understand what this challenge is asking of me? Can someone please explain it to me?

I always have a hard time trying to understand the coding challenges they are asking me becuase of the wording. Please can someone help me out?

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

class Business {
let name: String
let location: Location

init(name: String,  )
}

let someBusiness = self.Business

1 Answer

jcorum
jcorum
71,830 Points

Nick, good start. Now you just need to finish the initializer and then use it:

class Business {
  let name: String
  let location: Location

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

let someBusiness = Business(name: "Apple",  location: Location(latitude: 23.5, longitude: 27.6))

The initializer must make sure that each stored property has a value.

Then, outside the class, you create the constant and use the initializer to create an instance of Business.
There are two tricky parts. First, unlike languages like Java where the initializer and the class have the same name, Swift uses init for the former. But when you use the initializer you type Business.

Also, you need to pass in a location using the struct. You can create it separately, or you can do it in line, like I did above.