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

Posted by John Gilmer
John Gilmer
Courses Plus Student 3,782 Points

What am I doing wrong?

Can't figure out what is wrong with this.

objects.swift 
struct Location {
  let latitude: Double
  let longitude: Double
}
class Business {
let name: String
let location: Location
init(location: Location) {
 }
}
let Buisness = someBusiness(name:"Google", location: 12)

1 Answer

andren
andren
28,558 Points

There are a number of issues:

  1. You need to define a name parameter for the init method, not just location

  2. You need to set the name and location properties equal to the parameters passed in within the init method.

  3. When creating an instance you need to name the constant someBusiness and call Business, not the other way around.

  4. The location parameter expects an instance of the Location struct, which 12 is not.

Here is the solution with some comments added:

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

class Business {
  let name: String
  let location: Location

  // Define init method with name and location as parameters
  init(name: String, location: Location) { 
    // Set the name property equal to the name parameter
    self.name = name
    // Set the location property equal to the location parameter
    self.location = location
  }
}

// Create a Business instance by passing in a string and an instance of the Location struct
// and assign it to a constant named someBusiness 
let someBusiness = Business(name:"Google", location: Location(latitude: 0.00, longitude: 0.00))
kelly jewkes
kelly jewkes
1,765 Points

The added comments really help. Thank you.