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iOS Build a Playlist Browser with Swift Building the Music Library and Playlist Models Creating UIImageView instances

Jaron Trotter
Jaron Trotter
11,472 Points

Using a playlist instance challenge, I'm stuck..

Challenge Task 1 of 1

In our Treehouse model struct below we have a property named friends. It is a dictionary that holds information about our friends including their profile pictures. In the ViewController class, using the key profilePicture, retrieve the image name as a string from the dictionary and assign it to a constant named profileImageName. Iโ€™ve already created an instance of the Treehouse struct and stored a reference to the friends library in a constant named friends for you to use.

Once you have the image name, create an instance of UIImage using the image name and store it in a constant called profilePicture.

Guidance please. I'll be doing the video over, I also want some help?

ImageViews.swift
import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let friends = Treehouse().friends

        //Add your code below


    }

}
Treehouse.swift
struct Treehouse {
    let friends = [
        "firstName": "Susan",
        "lastName": "Olson",
        "profilePicture": "susan_profile.png"
    ]
}

1 Answer

Anjali Pasupathy
Anjali Pasupathy
28,883 Points

friends is currently a [String:String] dictionary that contains the key "profilePicture". This is the key the challenge asks you to access. It's important to note that when you access any value from a dictionary using a key, the value returned is an Optional value; because of this, you'll have to unwrap it with a bang (!). You're required to store the value that corresponds to the "profilePicture" key in a constant named profileImageName.

After this, the challenge asks you to create a new UIImage using profileImageName, and store that image as a constant called profilePicture. If you check the documentation for UIImage, you'll find that UIImage has an init method that takes in a single parameter of type String called named. This is the init method you should be using to instantiate profilePicture.

I hope this helps!