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Start your free trialChase Maddox
Courses Plus Student 5,461 PointsConfusion on Init Method
Hi,
I'm confused as to how the init() method works when there are multiple arguments and connecting the previous struct into the code. I tried reading through the Swift documentation on Initialization that Apple provides, but that was more overwhelming than helpful. Can you help me understand what I'm doing wrong in my code and not understanding?
Thanks, Chase
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: latitude, longitude: longitude)
}
}
let someBusiness = Business(name: "Chik-fil-A", latitude: 10.0, longitude: 13.0)
1 Answer
Michael Hulet
47,913 PointsInitializers are special methods that run only whenever you make a new instance of an object, but at their core, they're just methods. Methods can specify what they take as parameters, and then do something with what it's given. The initializer you made for your Business
class says that it takes a String
called name
, and a Location
struct called location
. However, when you call it, you're giving it a String
called name
, a Double
called latitude
, and another Double
called longitude
. It's expecting a Location
object, not 2 Double
s that aren't tied to anything at all, so you need to pass it one, like this:
//Notice how we're making a Location object and passing that to the Business initializer
let someBusiness = Business(name: "Something", location: Location(latitude: 100, longitude: 100))
Also, in the body of your initializer, you're creating a new Location
object from latitude
and longitude
parameters that don't exist. Instead, it's safe to just take the Location
object that the Business
initializer is given and assign it directly to self.location
Chase Maddox
Courses Plus Student 5,461 PointsChase Maddox
Courses Plus Student 5,461 PointsThanks so much for the clarification and help Michael! I see what I did, and definitely need some more practice.
Michael Hulet
47,913 PointsMichael Hulet
47,913 PointsNo problem! I'm glad I could help. You're definitely on the road to being a great Swift developer!