Values not being set to User object correctly - ios

Question

I have a User object..
class User: NSObject {
var uid: String!
var handle: String!
var name: String!
var profilePicture: String!
var gender: String!
var rooms: [String : AnyObject]!
}
.. which has its values set when the user signs up for the app, using the below function to set the values in both Firebase and the User object:
// Set inital user info to User object & Firebase
func setUserInfo() {
let userInit = User()
let userRef: FIRDatabaseReference = FIRDatabase.database().reference().child("users").childByAutoId()
let params = ["fields" : "first_name"]
let graphRequest = GraphRequest(graphPath: "me", parameters: params)
graphRequest.start {
(urlResponse, requestResult) in
switch requestResult {
case .failed(let error):
print("error in graph request:", error)
break
case .success(let graphResponse):
if let responseDictionary = graphResponse.dictionaryValue {
print(responseDictionary)
// Name
if let name = responseDictionary["first_name"] {
userRef.child("name").setValue(name)
// Profile pic
let facebookID: NSString = (responseDictionary["id"] as! NSString)
let profilePic = "https://graph.facebook.com/\(facebookID)/picture?type=large&return_ssl_resources=1"
userRef.child("profilePicture").setValue(profilePic)
// Handle
// Also check DB to make sure handle isn't already in use
if self.handleTextField.text != nil {
if let handle = self.handleTextField.text {
userRef.child("handle").setValue(handle)
// Gender
var gender = ""
switch self.genderString {
case "male":
gender = "male"
userRef.child("gender").setValue("male")
case "female":
gender = "female"
userRef.child("gender").setValue("female")
default:
gender = "other"
userRef.child("gender").setValue("other")
}
// UID
if let uid = FIRAuth.auth()?.currentUser?.uid {
userInit.uid = uid
userRef.child("uid").setValue(uid)
print("uid: \(uid)")
}
// Set all values to User object
userInit.name = name as! String
userInit.handle = handle
userInit.gender = gender
userInit.profilePicture = profilePic
self.user.append(userInit)
print("name: \(name)")
print("handle: \(handle)")
print("gender: \(gender)")
print("profilePic: \(profilePic)")
}
}
}
}
}
}
}
With this, all the user info is uploaded to Firebase just fine. However when I try to print the values of the User object in the next view controller:
let user = [User]()
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let users = User()
print("name: \(users.name)")
print("handle: \(users.handle)")
print("gender: \(users.gender)")
print("profilePic: \(users.profilePicture)")
}
All are printed as nil. Are the values not getting set to the object, or am I trying to access them wrong?

Answer 1

The point is that you are creating new empty class object in viewDidAppear(_ animated: Bool)
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let users = User() //you created new empty object of User Type
print("name: \(users.name)")
print("handle: \(users.handle)")
print("gender: \(users.gender)")
print("profilePic: \(users.profilePicture)")
}
and printing all values will give you nil as it is empty. So way which will work is to pass userInit object to second view controller having constant var myUser
var myUser:User!
in prepareForSegue from fristViewController to second you can supply user Object so hereby the code for secondVC class will become
SecondViewController.swift
var myUser:User!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let users = User() //you created new empty object of User Type
users = myUser
print("name: \(users.name)")
print("handle: \(users.handle)")
print("gender: \(users.gender)")
print("profilePic: \(users.profilePicture)")
}