Btukfyl

I am trying to display information taken from JSON. I've used .decode to get it. Now I want to put its text onto a simple label on my storyboard. At the bottom under ".resume()" is my attempt and it isn't working. I can't seem to figure this out.

import UIKit





struct WebsiteDescription: Decodable {

    var name : String

    var description : String

    var courses : [Course]



}





struct Course: Decodable {

    let id: Int

    let name: String

    let link: String

    let imageUrl: String

}



class ViewController: UIViewController {



    @IBOutlet weak var displayLabel: UILabel!



    override func viewDidLoad() {

        super.viewDidLoad()



        let jsonUrlString = "https://api.letsbuildthatapp.com/jsondecodable/website_description"

        guard let url = URL(string: jsonUrlString) else {return}

        URLSession.shared.dataTask(with: url) { (data, response, err) in

            guard let data = data else {return}



            do {

                let websiteDescription = try JSONDecoder().decode(WebsiteDescription.self, from: data)

                print(websiteDescription.name, websiteDescription.description, websiteDescription.courses)

                //let courses = try JSONDecoder().decode([Course].self, from: data)

            } catch let jsonErr {

                print("Error serializing json", jsonErr)

            }



        }.resume()



        let displayLabel.text = websiteDescription.name



    }



}

You need to update your label from within the do method. Also you should do it from the main thread so that the UI can be updated. I have updated the code below.

import UIKit



struct WebsiteDescription: Decodable { 

    var name : String 

    var description : String 

    var courses : [Course]

}



struct Course: Decodable { 

    let id: Int 

    let name: String 

    let link: String 

    let imageUrl: String 

}



class ViewController: UIViewController {



    @IBOutlet weak var displayLabel: UILabel!



    override func viewDidLoad() {

    super.viewDidLoad()



        let jsonUrlString = "https://api.letsbuildthatapp.com/jsondecodable/website_description"

        guard let url = URL(string: jsonUrlString) else {return}

        URLSession.shared.dataTask(with: url) { (data, response, err) in

        guard let data = data else {return}



        do {

            let websiteDescription = try JSONDecoder().decode(WebsiteDescription.self, from: data)

            print(websiteDescription.name, websiteDescription.description, websiteDescription.courses)

            //let courses = try JSONDecoder().decode([Course].self, from: data)



            DispatchQueue.main.async {

                self.displayLabel.text = websiteDescription.name

            }



         } catch let jsonErr {

            print("Error serializing json", jsonErr)

        }



    }.resume()

}