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Start your free trialDom Anca
931 PointsI'm really confused as to what init actually does
I get that for this step we don't actually need to use init as Swift does this for us, but I can't understand when we would ever need to use init. I also don't understand what a memberwise init is. If anyone could help I would be soo grateful, this is all so confusing haha
1 Answer
Amazon Web
iOS Development Techdegree Student 4,092 PointsHi :)
When I am starting my tech degree in treehouse I am also with the terminologies use in Swift.
Here is the example where is good to use a init in a struct. Below I will get a value from a dictionary and I don't want to initialize the struct using all of it's properties so I am going to create a init method.
struct CarInfo{
let wheels: Int
let doors: Int
let model: String
init (dictionary: [String: Any]) {
wheels = dictionary["Wheels"]
doors = dictionary["Doors"]
model = dictionary["Model"]
}
}
let car1 = CarInfo(dictionary: [dictioanry here])
And this the example where is good to use a memberwise initializer.
struct Person {
let lastName: String
let firstName: String
}
let person1 = Person(lastName: "Persone", firstName: "One")
So here, you don't need to create a init method because Swift will handle this for you.
Dom Anca
931 PointsDom Anca
931 PointsFirst of all thank you so much for taking the time to answer my question Iβm still a little lost- it seems that with your examples there isnβt any difference in functionality that I can see. Would you be able to tell me precisely what extra functionality you could want that would make you use init instead of just letting swift do it for you? Thanks again Dom