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Start your free trialCiaran Wood
Courses Plus Student 6,787 PointsPostDescription
Still having issue with this code.
struct Tag {
let name: String
}
struct Post {
let title: String
let author: String
let tag: Tag
init (title: String, author: String) {
self.title = title
self.author = author
self.tag = Tag(name: "Swift")
}
func description() -> String {
let p1 = "\(title) by \(author). Filed under \(self.tag.name)"
return p1
}
}
let firstPost = Post(title: "iOSDevelopment", author: "Apple")
let postDescription = firstPost.description()
2 Answers
David Lin
35,864 PointsAlso, since Post is a struct, the intializer is automatically created for you, so you don't even need to write your own init() method for it.
Simon Di Giovanni
8,429 PointsHello Ciaran
Ok - the reason you're receiving an error, is because you're not initialising the constant 'tag' in your init method to accept a passed in value, you're assigning it a value in the init method.
Please take a look at the below example, which worked for me.
struct Tag {
let name: String
}
struct Post {
let title: String
let author: String
let tag: Tag
init (title: String, author: String, tag: Tag) {
self.title = title
self.author = author
self.tag = Tag(name: tag.name)
}
func description() -> String {
let p1 = "\(title) by \(author). Filed under \(tag.name)"
return p1
}
}
let firstPost = Post(title: "iOSDevelopment", author: "Apple", tag: Tag(name: "Swift"))
let postDescription = firstPost.description()
So first take a look at the line
init (title: String, author: String, tag: Tag)
I've told the init method to accept a another parameter, of type Tag.
Next -
self.tag = Tag(name: tag.name)
This tells the init method to set up 'tag' to accept the struct Tag.
let firstPost = Post(title: "iOSDevelopment", author: "Apple", tag: Tag(name: "Swift"))
You'll notice that in firstPost you have to type out the correct syntax for initialising the Tag struct, and you put "Swift" into the place of tag.name, which then allows you to create a full instance of Post.
I hope this helps. Please let me know if you don't understand what I've written.
Regards
Simon