How to add Values to NSObject Model Variables in Swift? - ios

Question

I have created separate NSObject class called ProfileModel
like below:
class ProfileModel : NSObject, NSCoding{
var userId : String!
var phone : String!
var firstName : String!
var email : String!
var profileImageUrl : String!
var userAddresses : [ProfileModelUserAddress]!
// Instantiate the instance using the passed dictionary values to set the properties values
init(fromDictionary dictionary: [String:Any]){
userId = dictionary["userId"] as? String
phone = dictionary["phone"] as? String
firstName = dictionary["firstName"] as? String
email = dictionary["email"] as? String
profileImageUrl = dictionary["profileImageUrl"] as? String
}
/**
* Returns all the available property values in the form of [String:Any] object where the key is the approperiate json key and the value is the value of the corresponding property
*/
func toDictionary() -> [String:Any]
{
var dictionary = [String:Any]()
if userId != nil{
dictionary["userId"] = userId
}
if phone != nil{
dictionary["phone"] = phone
}
if firstName != nil{
dictionary["firstName"] = firstName
}
if email != nil{
dictionary["email"] = email
}
if profileImageUrl != nil{
dictionary["profileImageUrl"] = profileImageUrl
}
return dictionary
}
/**
* NSCoding required initializer.
* Fills the data from the passed decoder
*/
#objc required init(coder aDecoder: NSCoder)
{
userId = aDecoder.decodeObject(forKey: "userId") as? String
userType = aDecoder.decodeObject(forKey: "userType") as? String
phone = aDecoder.decodeObject(forKey: "phone") as? String
firstName = aDecoder.decodeObject(forKey: "firstName") as? String
email = aDecoder.decodeObject(forKey: "email") as? String
profileImageUrl = aDecoder.decodeObject(forKey: "profileImageUrl") as? String
}
/**
* NSCoding required method.
* Encodes mode properties into the decoder
*/
#objc func encode(with aCoder: NSCoder)
{
if userId != nil{
aCoder.encode(userId, forKey: "userId")
}
if phone != nil{
aCoder.encode(phone, forKey: "phone")
}
if firstName != nil{
aCoder.encode(firstName, forKey: "firstName")
}
if email != nil{
aCoder.encode(email, forKey: "email")
}
if profileImageUrl != nil{
aCoder.encode(profileImageUrl, forKey: "profileImageUrl")
}
}
}
In RegistrationViewController I adding firstName value which i need to show in ProfileViewController How ?
In RegistrationViewController i am adding firstName and phone values which i need in ProfileViewController:
class RegistrationViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var firstNameTextField: FloatingTextField!
var userModel : ProfileModel?
override func viewDidLoad() {
let userID: String=jsonObj?["userId"] as? String ?? ""
self.userModel?.firstName = self.firstNameTextField.text
self.userModel?.phone = phoneTextField.text
}
}
This is ProfileViewController here in name and number i am not getting firstName and phone values why?:
class ProfileViewController: UIViewController {
#IBOutlet var name: UILabel!
#IBOutlet var number: UILabel!
var userModel : ProfileModel?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
name.text = userModel?.firstName
number.text = userModel?.phone
}
}
PLease help me with code.

Answer 1

You cannot set firstName or phone to the userModal which is nil. First you should create an instance, and then you can pass it through your controllers. We should change code step by step:
class ProfileModel {
var userId : String?
var phone : String?
var firstName : String?
var email : String?
var profileImageUrl : String?
var userAddresses : [ProfileModelUserAddress]?
init() {}
}
Second, you need to reach ProfileModel instance from both of your ViewController classes. For this, you can create a singleton class:
class ProfileManager {
static var shared = ProfileManager()
var userModel: ProfileModel?
private init() {}
}
Then you can reach it from both of your ViewControllers:
class RegistrationViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var firstNameTextField: FloatingTextField!
override func viewDidLoad() {
super.viewDidLoad()
let userModel = ProfileModel()
userModel.firstName = self.firstNameTextField.text
ProfileManager.shared.userModel = userModel
}
}
Other VC:
class ProfileViewController: UIViewController {
#IBOutlet var name: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
if let userModel = ProfileManager.shared.userModel,
let firstName = userModel.firstName {
name.text = firstName
}
}
}
Modify it as you wanted.