TEAM LICENSES: Save money and learn new skills through a Hacking with Swift+ team license >>

SOLVED: Unable to Decode From UserDefaults

Forums > 100 Days of SwiftUI

Hi there,

Does anyone know why I am unable to decode an array of 'Habit' in the 'HabitArray' class initialiser?

struct Habit: Identifiable, Codable {
    var id = UUID()
    var name: String
    var timesCompleted: Int
    var description: String
}
class HabitArray: ObservableObject {
    @Published var habitArray = [Habit]() {
        didSet {
            let encoder = JSONEncoder()

            if let encoded = try? encoder.encode(habitArray) {
                UserDefaults.standard.set(encoded, forKey: "HabitArray")
            }
        }
    }

    init() {
        if let items = UserDefaults.standard.data(forKey: "HabitArray") {
            let decoder = JSONDecoder()

            if let decoded = try? decoder.decode([Habit].self, from: habitArray) {
                self.habitArray = decoded
                return
            }
        }

        self.habitArray = []
    }
}

The below code gives me the error message "Cannot convert value of type 'Habit' to expected argument type 'Data'" on the following line:

if let decoded = try? decoder.decode([Habit].self, from: habitArray) {
                self.habitArray = decoded
                return
            }

Thanks

3      

the from: is expecting a data and you are passing it a habitArray. Try items which is the data you got back from the userDefaults.

(although you should rename that to habitArrayData or similar I think)

4      

That worked, thank you!

3      

Hacking with Swift is sponsored by RevenueCat.

SPONSORED Take the pain out of configuring and testing your paywalls. RevenueCat's Paywalls allow you to remotely configure your entire paywall view without any code changes or app updates.

Learn more here

Sponsor Hacking with Swift and reach the world's largest Swift community!

Archived topic

This topic has been closed due to inactivity, so you can't reply. Please create a new topic if you need to.

All interactions here are governed by our code of conduct.

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.