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iOS Build a Simple iPhone App with Swift Getting Started with iOS Development Swift Recap Part 1

How to initialize a struct value being used inside of another struct?

struct Tag { let name: String }

struct Post { let title: String let author: String let tag: Tag }

let firstPost = Post( title: "hi", author: "hi", tag: "hi")

When I try to run this knowledge check quiz question I keep getting an error with the very last piece of code on "tag: "hi")". It seems like I do not know the syntax for creating an instance of struct Post, which is what this question is asking for.

structs.swift
struct Tag {
  let name: String
}

struct Post {
  let title: String
  let author: String
  let tag: Tag
  }


  let firstPost = Post( title: "hi", author: "hi", tag: "hi")

2 Answers

andren
andren
28,558 Points

You initialize it in the same way you initialize a struct in other situations. In your code you are initializing the Post struct by providing values for all its variables, you have to do the exact same thing when you want to assign a Tag instance to the tag variable. Like this:

struct Tag {
  let name: String
}

struct Post {
  let title: String
  let author: String
  let tag: Tag
  }


let firstPost = Post( title: "hi", author: "hi", tag: Tag(name: "hi"))
Brandon Adams
Brandon Adams
10,325 Points

Because you are putting a String where the tag needs to go. You are initializing tag with "hi". You need to initialize tag with Tag(name: "hi")