NSKeyedArchiver does not work in Swift 3 ( XCode 8)

Question

I have migrated my project to Swift 3 and NSKeyedArchiver does not work. I actually have a runtime error when trying to decode object like this:

let         


        

Answer 1

Here is solution:

class Person: NSObject, NSCoding {
let name: String
let age: Int
required init(name: String, age: Int) {
    self.name = name
    self.age = age
}
required init(coder decoder: NSCoder) {
    self.name = decoder.decodeObject(forKey: "name") as? String ?? ""
    self.age = decoder.decodeInteger(forKey: "age")
}

func encode(with coder: NSCoder) {
    coder.encode(name, forKey: "name")
    coder.encode(age, forKey: "age")
}}

How to use:

class ViewController: UIViewController {
override func viewDidLoad() {
    super.viewDidLoad()
    let newPerson = Person(name: "Joe", age: 10)
    var people = [Person]()
    people.append(newPerson)
    let encodedData = NSKeyedArchiver.archivedData(withRootObject: people)
    UserDefaults.standard().set(encodedData, forKey: "people")
    if let data = UserDefaults.standard().data(forKey: "people"),
        myPeopleList = NSKeyedUnarchiver.unarchiveObject(with: data) as? [Person] {
        myPeopleList.forEach({print( $0.name, $0.age)})  // Joe 10
    } else {
        print("There is an issue")
    }
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}}

Reference: Swift 3 saving and retrieving custom object from userDefaults