I am trying to keep the user logged in. I tried with the code below. The app uses Firebase for storing data and logging in users.
import UIKit
import Firebase
class WelcomeViewController: UIViewController {
#IBOutlet weak var logInButton: UIButton!
#IBOutlet weak var signUpButton: UIButton!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
navigationController?.isNavigationBarHidden = true
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
navigationController?.isNavigationBarHidden = false
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
logInButton.backgroundColor = .clear
logInButton.layer.cornerRadius = 27
logInButton.layer.borderWidth = 1
logInButton.layer.borderColor = UIColor.systemGreen.cgColor
if Auth.auth().currentUser != nil {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let secondVC = storyboard.instantiateViewController(identifier: "EcoMapViewController")
show(secondVC, sender: self)
} else {
do {
try Auth.auth().signOut()
navigationController?.popToRootViewController(animated: true)
} catch let signOutError as NSError {
print("Error signing out: %#", signOutError)
}
}
}
}
Userdefault in this case is not a viable solution as they are not encrypted and can be accessed and modified by anyone. A good solution is to use Apple's keychain. I would recommend using this open source keyChain Api module, so that it becomes easier to interface with it.
Related
I'm following a tutorial on CoreData and I've been following it exactly, yet when they run the app, everything works and saves correctly, yet I get a nil error. The tutorial is a few years old, so I'm not sure if something has been udpated in the way CoreData works. It's an app to save goals.
Here's the first view controller where you enter the text of the goal and if it is short or long term:
import UIKit
class CreateGoalViewController: UIViewController, UITextViewDelegate {
#IBOutlet weak var goalTextView: UITextView!
#IBOutlet weak var shortTermButton: UIButton!
#IBOutlet weak var longTermButton: UIButton!
#IBOutlet weak var nextButton: UIButton!
var userGoalType: GoalType = .shortTerm
override func viewDidLoad() {
super.viewDidLoad()
nextButton.bindToKeyboard()
shortTermButton.setSelectedColor()
longTermButton.setDeselectedColor()
print("\(userGoalType)")
goalTextView.delegate = self
}
#IBAction func nextButtonPressed(_ sender: Any) {
if goalTextView.text != "" && goalTextView.text != "What is your goal?" {
guard let finishVC = storyboard?.instantiateViewController(withIdentifier: "FinishVC") as? FinishGoalViewController else {return}
finishVC.initData(description: goalTextView.text!, type: userGoalType)
print("\(finishVC.goalType.rawValue) after next button pressed")
performSegue(withIdentifier: "goToFinish", sender: self)
}
}
#IBAction func longTermButtonPressed(_ sender: Any) {
userGoalType = .longTerm
longTermButton.setSelectedColor()
shortTermButton.setDeselectedColor()
print("\(userGoalType)")
}
#IBAction func shortTermButtonPressed(_ sender: Any) {
userGoalType = .shortTerm
shortTermButton.setSelectedColor()
longTermButton.setDeselectedColor()
print("\(userGoalType)")
}
#IBAction func backButtonPressed(_ sender: Any) {
dismiss(animated: true)
}
func textViewDidBeginEditing(_ textView: UITextView) {
goalTextView.text = ""
goalTextView.textColor = UIColor(ciColor: .black)
}
}
And here's the following view controller where you set the number of times you want to do that goal where the CoreData functions are:
import UIKit
import CoreData
class FinishGoalViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var createButton: UIButton!
#IBOutlet weak var pointsTextField: UITextField!
var goalDescription: String!
var goalType: GoalType!
func initData(description: String, type: GoalType) {
self.goalDescription = description
self.goalType = type
}
override func viewDidLoad() {
super.viewDidLoad()
createButton.bindToKeyboard()
pointsTextField.delegate = self
}
#IBAction func createGoalPressed(_ sender: Any) {
if pointsTextField.text != ""{
self.save { finished in
if finished {
dismiss(animated: true)
}
}
}
}
#IBAction func backButtonPressed(_ sender: Any) {
dismiss(animated: true)
}
func save(completion: (_ finished: Bool) -> ()) {
guard let managedContext = appDelegate?.persistentContainer.viewContext else {return}
let goal = Goal(context: managedContext)
goal.goalDescription = goalDescription
goal.goalType = goalType.rawValue
goal.goalCompletionValue = Int32(pointsTextField.text!)!
goal.goalProgress = Int32(0)
do{
try managedContext.save()
print("successfully saved data")
completion(true)
}catch{
debugPrint("Could not save: \(error.localizedDescription)")
completion(false)
}
}
}
I'm getting a nil error in the save function with the goalType.rawValue turning up nil. The goal type is set up in an enum file:
import Foundation
enum GoalType: String {
case longTerm = "Long Term"
case shortTerm = "Short Term"
}
I'm not sure why there's an error. Because in the CreateGoalViewController, I print the goalType.rawValue from the following view controller and it comes up with the correct string, either short or long-term. But when FinishGoalViewController loads, it is all of a sudden nil.
You are initiating and configuring your FinishGoalViewController in nextButtonPressed but you never use it. performSegue(withIdentifier: "goToFinish", sender: self) will create and push a new instance of FinishGoalViewController.
The most simple aproach would be to push your allready configured controller from your curent Controller. Remove performSegue(... and use.
self.navigationController?.pushViewController(finishVC, animated: true)
If you still want to use the segue, remove everything from the nextButtonPressed function, leaving just the performSegue(... line. After that add this function to your CreateGoalViewController controller.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToFinish" {
if let finishVC = segue.destination as? FinishGoalViewController {
// configure finshVC here
}
}
}
im attempting to add user data via a create account view controller which contains all UITextFields (password, confirm password, first name, last name, phone number). when the create account button is tapped, the users email shows up in the authentication section on the firebase website but the user information from the first name, last name and phone number text fields are not passed into the database. I'm new to iOS development and have never used firebase so im unsure what the issue is. the app runs without crashing.
below is my Create Account view controller
thanks in advance
import UIKit
import FirebaseAuth
import QuartzCore
import FirebaseDatabase
import Firebase
class CreateAccount: UIViewController {
var refUsers: DatabaseReference!
#IBOutlet weak var emailTextField: UITextField!
#IBOutlet weak var passwordTextField: UITextField!
#IBOutlet weak var confirmPasswordTextField: UITextField!
#IBOutlet weak var firstNameTextField: UITextField!
#IBOutlet weak var lastNameTextField: UITextField!
#IBOutlet weak var phoneNumberTextField: UITextField!
#IBOutlet weak var alreadyHaveAccountLabel: UILabel!
#IBAction func loginButtonTapped(_ sender: Any) {
performSegue(withIdentifier: "showLoginScreen", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
self.refUsers = Database.database().reference().child("Users");
// Do any additional setup after loading the view.
}
override func viewDidAppear(_ animated: Bool) {
if Auth.auth().currentUser != nil {
print("success")
self.presentMainScreen()
}
}
#IBAction func createAccountTapped(_ sender: Any) {
if let email = emailTextField.text, let password = passwordTextField.text {
Auth.auth().createUser(withEmail: email, password: password, completion:{ user, error in
if let firebaseError = error {
print(firebaseError.localizedDescription)
return
} else {
self.addUser()
print("this is the first name:", self.firstNameTextField.text!)
print("this is the last name:", self.lastNameTextField.text!)
print("this is the phone number" , self.phoneNumberTextField.text!)
print("success")
self.presentMainScreen()
}
})
}
}
func addUser(){
let key = refUsers.childByAutoId().key
let user = ["id":key,
"FirstName":firstNameTextField.text! as String,
"LastName":lastNameTextField.text! as String,
"PhoneNumber":phoneNumberTextField.text! as String
]
refUsers.child(key).setValue(user)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
func presentMainScreen(){
let mainstoryboard = UIStoryboard(name: "Main", bundle: nil)
let mainTabController = mainstoryboard.instantiateViewController(withIdentifier: "MainTabController") as! MainTabController
mainTabController.selectedViewController = mainTabController.viewControllers?[0]
self.present(mainTabController, animated: true, completion: nil)
//let storyboard:UIStoryboard = UIStoryboard(name:"Main", bundle:nil)
//let loggedInVC:LoggedInVC = storyboard.instantiateViewController(withIdentifier: "LoggedInVC") as! LoggedInVC
//self.present(loggedInVC, animated: true, completion: nil)
}
}
Try this:
Instead of set value use update value
let childUpdates = ["/user/\(key)": user]
refUser.updateChildValues(childUpdates)
Hope this helps :)
when following the instructions for FirebaseUI to display the LoginViewController it only shows a black screen.
As you can see it kind of replaces the current viewcontroller instead of presenting it.
Here is the code from the presenting viewcontroller
import UIKit
import Firebase
import FirebaseUI
class FirstViewController: UIViewController {
#IBOutlet weak var logoutButton: UIButton!
var rootRef = Firebase(url: Constants.FireBaseUrl)
var loginViewController: FirebaseLoginViewController!
override func viewDidLoad() {
super.viewDidLoad()
loginViewController = FirebaseLoginViewController(ref: rootRef)
loginViewController.enableProvider(.Facebook)
loginViewController.enableProvider(.Password)
loginViewController.didDismissWithBlock { (user: FAuthData!, error: NSError!) -> Void in
if (user != nil) {
// user
} else if (error != nil) {
// error
} else {
// cancel
}
}
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if (loginViewController.currentUser() == nil) {
presentViewController(loginViewController, animated: true, completion: nil)
}
}
// MARK: - Actions
#IBAction func logoutTouched(sender: AnyObject) {
rootRef.unauth()
}
}
So on my first screen of my iOS app I have a “Login” “SignUp” and a “SignUp With Facebook” buttons. The first two buttons link to their own view controllers just fine, and once logged in the simulator will automatically log them in with the:
if PFUser.currentUser() != nil {
self.performSegueWithIdentifier("autoSegue", sender: self)
} else {
Code that you can see at the bottom of the full block of code below. However the Facebook signup I want to transition to a separate view controller where I can show them their profile pic, capture the data on Parse, have them enter a user name, then segue to the same view controller that the SignUp and Login go to – autoSegue. I have all the code on that view controller already written out, but my problem is that when they click the signup button for Facebook, it takes them through the autoSegue and not the fbSignup segue (the one that links to where I want to capture the FB data). Both segues are linked directly from the view controller (not the buttons themselves), and I receive no build errors. I appreciate any help.
Thanks!
Full code:
import UIKit
import Parse
import MediaPlayer
import FBSDKCoreKit
class ViewController: UIViewController {
#IBOutlet var loginAlpha: UIButton!
#IBOutlet var signupAlpha: UIButton!
var avPlayer: AVPlayer!
var avPlayerLayer: AVPlayerLayer!
var paused: Bool = false
#IBAction func facebookSignup(sender: AnyObject) {
let permissions = ["public_profile"]
PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions) { (user: PFUser?, error: NSError?) -> Void in
if let error = error {
print(error)
} else {
if let user = user {
self.performSegueWithIdentifier("fbSignup", sender: self)
}
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
// code for background video
let theURL = NSBundle.mainBundle().URLForResource("test", withExtension: "mp4")
avPlayer = AVPlayer(URL: theURL!)
avPlayerLayer = AVPlayerLayer(player: avPlayer)
avPlayerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
avPlayer.volume = 0
avPlayer.actionAtItemEnd = AVPlayerActionAtItemEnd.None
avPlayerLayer.frame = view.layer.bounds
view.backgroundColor = UIColor.clearColor();
view.layer.insertSublayer(avPlayerLayer, atIndex: 0)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: "playerItemDidReachEnd:",
name: AVPlayerItemDidPlayToEndTimeNotification,
object: avPlayer.currentItem)
}
func playerItemDidReachEnd(notification: NSNotification) {
let p: AVPlayerItem = notification.object as! AVPlayerItem
p.seekToTime(kCMTimeZero)
}
override func viewDidAppear(animated: Bool) {
if PFUser.currentUser() != nil {
self.performSegueWithIdentifier("autoSegue", sender: self)
} else {
signupAlpha.alpha = 0
loginAlpha.alpha = 0
UIView.animateWithDuration(1.5, delay: 1.0, options: [], animations: { () -> Void in
self.signupAlpha.alpha = 1.0
self.loginAlpha.alpha = 1.0
}, completion: nil)
avPlayer.play()
paused = false
}
}
override func viewDidDisappear(animated: Bool) {
avPlayer.pause()
paused = true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
You are using Storyboards? You may have messed up on the storyboard and connected the segue to the wrong ViewController.
I can't see anything particularly wrong with your code.
I have two View Controllers: "DiscoverViewController" and "LocationRequestModalViewController".
The first time a user opens the "DiscoverViewController", I overlay "LocationRequestModalViewController" which contains a little blurb about accessing the users location data and how it can help them.
On the "LocationRequestModalViewController" there are two buttons: "No thanks" and "Use location". I need to send the response from the user back to the "DiscoverViewController"
I have done some research and found that delegates/protocols are the best way to do it, so I followed a guide to get that working, but I'm left with 2 errors and can't figure them out.
The errors are:
On DiscoverViewController
'DiscoverViewController' is not convertible to 'LocationRequestModalViewController'
On LocationRequestModalViewController
'LocationRequestModalViewController' does not have a member name 'sendBackUserLocationDataChoice'
I've marked where the errors are happen in the following files:
DiscoverViewController.swift
class DiscoverViewController: UIViewController, UITextFieldDelegate, CLLocationManagerDelegate, LocationRequestModalViewControllerDelegate {
func showLocationRequestModal() {
var storyboard = UIStoryboard(name: "Main", bundle: nil)
var locationRequestVC: AnyObject! = storyboard.instantiateViewControllerWithIdentifier("locationRequestVC")
self.presentingViewController?.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
self.tabBarController?.presentViewController(locationRequestVC as UIViewController, animated: true, completion: nil)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
let vc = segue.destinationViewController as LocationRequestModalViewController
vc.delegate = self //This is where error 1 happens
}
func sendBackUserLocationDataChoice(controller: LocationRequestModalViewController, useData: Bool) {
var enableData = useData
controller.navigationController?.popViewControllerAnimated(true)
}
override func viewDidLoad() {
super.viewDidLoad()
showLocationRequestModal()
}
}
LocationRequestModalViewController
protocol LocationRequestModalViewControllerDelegate {
func sendBackUserLocationDataChoice(controller:LocationRequestModalViewController,useData:Bool)
}
class LocationRequestModalViewController: UIViewController {
var delegate:LocationRequestModalViewController? = nil
#IBAction func dontUseLocationData(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
#IBAction func useLocationData(sender: AnyObject) {
delegate?.sendBackUserLocationDataChoice(self, useData: true) // This is where error #2 happens
}
override func viewDidLoad() {
super.viewDidLoad()
//Modal appearance stuff here...
}
}
The answer is in your question itself. Both errors tells the exact reason.
Issue 1
let vc = segue.destinationViewController as LocationRequestModalViewController
vc.delegate = self //This is where error 1 happens
The self is of type DiscoverViewController
But you declared the delegate as:
var delegate:LocationRequestModalViewController? = nil
You need to change that to:
var delegate:DiscoverViewController? = nil
Issue 2
The same reason, LocationRequestModalViewController does not confirm to the LocationRequestModalViewControllerDelegate, change the delegate declaration.
You have defined your delegate as having type LocationRequestModalViewController which does not conform to LocationRequestModalViewControllerDelegate.