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iOS Build a Simple iPhone App with Swift 2.0 Getting Started with iOS Development Swift Recap Part 1

Mika Izmylove
Mika Izmylove
322 Points
Posted by Mika Izmylove
Mika Izmylove
322 Points

how to create an instance

My app crashes when trying to create an instance of Post and assign it to a constant named firstPost

Kevin Roundtree
Kevin Roundtree
4,575 Points
Kevin Roundtree
Kevin Roundtree
4,575 Points

Hi Mika,

Can you post your code?

Make sure your constant is of type Post if you want to assign an instance of Post to firstPost.

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Mika,

Here, you have created a struct called Post which includes another struct called Tag. You want to create an instance of Post.

To do this, you need to give a value to all the stored properties inside Post. That's further complicated by needing to create an instance of Tag inside the creation of Post!!

Have a look at this:

struct Tag {
    let name: String
}

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

let firstPost = Post(title: "Title", author: "Me", tag: Tag(name: "Treehouse"))

Let me know if that makes sense. You add strings for the first two stored properties, then create a whole new instance of Tag for the third.

Steve.