Two different ways to answer this question. Not sure which is correct.

Question

Hi Guys,
there are two way to answer this question, I am not sure which one to use, and why they are both correct.
Version 1:
/code
struct Tag {
    let name: String
}
struct Post {
    let title: String
    let author: String
    let tag: Tag
init(title: String, author: String, tag: String){
self.title=title
self.author=author
self.tag=Tag(tag)
}
let firstPost = Post(title: "IOSDevelopment", author: "Apple", tag: "swift")
Version 2:
struct Tag {
    let name: String
}
struct Post {
    let title: String
    let author: String
    let tag: Tag
}
let firstPost = Post(title: "IOSDevelopment", author: "Apple", tag: Tag(name:"swift"))
Fundamentally I think what I do not understand is when should I be initializing and when not?  Why in this case is it ok to not use init()? Do I need to specifically initialize if a class is not a subclass?

garyguermantokman · Accepted Answer

Hey,
Go with the second way. The init() function should be used with structs when you want to initialize the values differently than what the default initializer gives you. This example is basic and you can use the default init(). Docs on Init (https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Initialization.html#//apple_ref/doc/uid/TP40014097-CH18-ID203)
```
struct Tag {
    let name: String
}
struct Post {
let title: String
let author: String
var tag: Tag

func description() -> String {

return "\(title) by \(author). Filed under \(tag.name)"
}
}
let firstPost = Post(title: "Hello", author: "Gary", tag: Tag(name: "Treehouse"))
let postDescription = firstPost.description()
```

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Patrick Stäuble

Patrick Stäuble

Two different ways to answer this question. Not sure which is correct.

1 Answer

garyguermantokman

garyguermantokman