how to use updateValue to add an object in Swift - ios

Question

I have a User Struct that I'm casting to Json to be able to get into NSUserDefaults...
import Foundation
struct User {
var name = ""
var stores: [Store] = []
init?(json: [String: AnyObject]) {
if let name = json["name"] as? String,
storesJSON = json["stores"] as? [[String: AnyObject]]
{
self.name = name
self.stores = storesJSON.map { Store(json: $0)! }
} else {
return nil
}
}
init() { }
func toJSON() -> [String: AnyObject] {
return [
"name": name,
"stores": stores.map { $0.toJSON() }
]
}
}
and I am using a Data Manager class (Singleton) to add a new User. But I can't figure out what to pass into updateValue in my addPerson function below? Alternatively is there another way to get this object into NSUserDefaults?
import Foundation
class DataManager {
static let sharedInstance = DataManager()
var users = [String : User]()
init() {
let userDefaults = NSUserDefaults.standardUserDefaults()
if let var userFromDefaults = userDefaults.objectForKey("users") as? [String : User] {
users = userFromDefaults
}
else {
// add default values later
}
}
var userList: [String] {
var list: [String] = []
for userName in users.keys {
list.append(userName)
}
list.sort(<)
return list
}
func addPerson(newUserName: String) {
users.updateValue(User(), forKey: newUserName)
// saveData()
}

Answer 1

You should change your interface of the addPerson function, use addPerson(newUser: User) instead of using addPerson(newUserName: String) as #iosDev82 said:
// Because your addPerson function needs two parameters: a name and a user object
func addPerson(newUser: User) {
users.updateValue(newUser, forKey: newUser.name)
// saveData()
}
so you can:
let newName = textField.text.capitalizedString
let newUser = User(["name": newName, "stores" : []])
DataManager.sharedInstance.addPerson(newUser)

Answer 2

I think you already know how to create a User object. And that is what you should pass as an argument to your following function. Something like this.
var aUser = User(["name": textField.text. capitalizedString])
DataManager.sharedInstance.addPerson(aUser)
func addPerson(newUser: User) {
users[newUser.name] = newUser
// saveData()
}