I'm a newbie trying to connect my app to a backend (Firebase Database). Specifically, I have four fields where users enter content and I am trying to set a child node equal to each of those fields. Unfortunately, while I get no errors, nothings posts in the database. I'm not sure if I'm missing something big or small so any guidance would be really appreciated. Code is below:
class ThirdViewController: UIViewController {
var ref:FIRDatabaseReference!
#IBOutlet weak var bookTitle: UITextField!
#IBOutlet weak var bookDescription: UITextField!
#IBOutlet weak var authorBiography: UITextView!
#IBOutlet weak var bookPurchaseLink: UITextView!
#IBAction func saveButtonTapped(_ sender: Any) {
let bookTitleContent = String(describing: bookTitle.text)
let bookDescriptionContent = String(describing: bookDescription.text)
let authorBiographyContent = String(describing: authorBiography.text)
let bookPurchaseLinkContent = String(describing: bookPurchaseLink.text)
func viewDidLoad() {
super.viewDidLoad()
//post to database
ref = FIRDatabase.database().reference()
self.ref.child(uuid).child("Book Info").child("Book Title").setValue(bookTitleContent)
self.ref.child(uuid).child("Book Info").child("Book Description").setValue(bookDescriptionContent)
self.ref.child(uuid).child("Book Info").child("Author Biography").setValue(authorBiographyContent)
self.ref.child(uuid).child("Book Info").child("Book Purchase Link").setValue(bookPurchaseLinkContent)
}
}
Check Firebase Rules to Read And write.!
{
"rules": {
".read": "auth != null",
".write": "auth != null"
}
}
mdatabase = FirebaseDatabase.getInstance();
mdatabaseReference = mdatabase.getReference();
mdatabaseReference.child("Child").setValue(Data);
//
Kindly have a look at documentation
hope this may help you.!
Related
I am a newbie in Swift, learning from building a social media app following a tutorial of Kasey Schlaudt on youtube. When I write this line KeychainWrapper.standard.set((user?.uid)!, forKey: "KEY_UID") at minutes 36:11 if this video: https://youtu.be/gBB5tnAzjjo?t=2171 I get this error —> Value of type 'AuthDataResult' has no member 'uid'. Any suggestions on why this might be happening?
This is my code so far:
import UIKit
import Firebase
import SwiftKeychainWrapper
class ViewController: UIViewController {
#IBOutlet weak var UserImageView: UIButton!
#IBOutlet weak var usernameField: UITextField!
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func signInPress(_ sender: Any) {
if let email = emailField.text, let password = passwordField.text {
Auth.auth().createUser(withEmail: email, password: password) { (user, error) in
if error != nil {
//Create account
} else {
KeychainWrapper.standard.set((user?.uid)!, forKey: "KEY_UID")
}
}
}
}
}
Any help would be much appreciated !
The API documentation for createUser says that it provides an AuthDataResult object as the result. As you can see from link, it doesn't have a uid property. You will want to use its user property to get a User object that does have a uid.
Auth.auth().createUser(withEmail: email, password: password) { (result, error) in
if error != nil {
//Create account
} else {
KeychainWrapper.standard.set((result?.user.uid)!, forKey: "KEY_UID")
}
}
I am a newbie in Swift and I am learning by building a social media application.
I am struck at trying to implement self.ref.child("users").child(user.uid).setValue(["username": username]) in my code (from https://firebase.google.com/docs/database/ios/read-and-write).
I have been following the instructions of Kasey Schlaudt and at this point of the tutorial https://youtu.be/GrRggN41VF0?t=619 he tried to add a user with setValue as shown in the Firebase documentation I have linked. The errors I get in the line self.ref.child("users").child(user.uid).setValue(["username": username]) are
Use of unresolved identifier 'user' and Use of unresolved identifier 'username'.
My code so far (with some little changes from the original code in the video in my signInPress function) is
import UIKit
import Firebase
import SwiftKeychainWrapper
class ViewController: UIViewController {
#IBOutlet weak var UserImageView: UIButton!
#IBOutlet weak var usernameField: UITextField!
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
override func viewDidLoad()
{
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool)
{
if let _ : Bool = KeychainWrapper.standard.string(forKey: "uid") != nil
{
self.performSegue(withIdentifier: "toFeed", sender: nil)
}
}
func storeUserData(userID: String)
{
//---------------------------problematic line---------------------------
//from https://firebase.google.com/docs/database/ios/read-and-write
//from https://youtu.be/GrRggN41VF0?t=619
self.ref.child("users").child(user.uid).setValue(["username": username])
([
"username": usernameField.text
])
}
#IBAction func signInPress(_ sender: Any)
{
//this way you make sure there is a property inside emailField.text and you have a variable you can easily use
if let email = emailField.text, let password = passwordField.text
{
Auth.auth().signIn(withEmail: email, password: password)
{ (result, error) in
if error != nil && self.usernameField.text!.isEmpty && self.UserImageView.image != nil
{
Auth.auth().createUser(withEmail: email, password: password)
{ (result, error) in
self.storeUserData(userID: (result?.user.uid)!)
KeychainWrapper.standard.set((result?.user.uid)!, forKey: "KEY_UID")
self.performSegue(withIdentifier: "toFeed", sender: nil)
}
} else
{
KeychainWrapper.standard.set((result?.user.uid)!, forKey: "KEY_UID")
self.performSegue(withIdentifier: "toFeed", sender: nil)
}
}
}
}
}
I would very much appreciate any indication as to why the error does not occur for Kasey and what I might need to change to do the same process.
Thank you in advance !
You're actually pretty close, more of a typo issue. See that your storeUserData function is expecting a string called userID? That's what's needed in the line to store that data instead of user.uid
func storeUserData(userID: String) {
let username = self.usernameField.text
self.ref.child("users").child(userID).setValue(["username": username])
here ^^^^^^ userID instead of user.uid
}
I'm putting together a series of registration pages where users are first presented with a "create account using Facebook" button, which logs them in, and then presents them with a basic registration page filled with empty text boxes. However, I am trying to populate some of these text boxes with the users' values gathered from the Graph Request.
Here is the first screen with the registration button:
import UIKit
import FBSDKLoginKit
class RegisterVC: UIViewController, FBSDKLoginButtonDelegate {
var fbLoginSuccess = false
var fbName:String!
var fbEmail:String!
override func viewDidLoad() {
super.viewDidLoad()
let loginButton = FBSDKLoginButton()
view.addSubview(loginButton)
loginButton.frame = CGRect(x: 82, y: 325, width: view.frame.width - 210, height: 59)
loginButton.delegate = self
}
func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {
print("Did log out of facebook")
}
func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) {
if error != nil {
print(error)
return
}
print("Successfully logged in")
FBSDKGraphRequest(graphPath: "/me", parameters: ["fields": "id, name, email"]).start {(connection, result, err) in
if err != nil {
print("Failed to start graph request", err)
return
} else {
guard let data = result as? [String:Any] else {return}
let fbEmail = data["email"]
let fbName = data["name"]
func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let vc = segue.destination as? CreateAccountVC
vc!.email.text = self.fbEmail
vc!.fullname.text = self.fbName
}
}
print(result)
}
performSegue(withIdentifier: "regSegue", sender: RegisterVC.self)
}
And these are the text boxes on the next screen:
import UIKit
class CreateAccountVC: UIViewController {
#IBOutlet weak var fullname: UITextField!
#IBOutlet weak var username: UITextField!
#IBOutlet weak var age: UITextField!
#IBOutlet weak var email: UITextField!
#IBOutlet weak var verifyEmail: UITextField!
#IBOutlet weak var password: UITextField!
#IBOutlet weak var verifyPassword: UITextField!
All the code above presents me with the registration page, but the text boxes are empty and not populated with the Facebook data. I'm not a great coder and really and help would be useful. Let me know if you have any solutions! Thanks.
The problem exists in this snippet:
func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let vc = segue.destination as? CreateAccountVC
vc!.email.text = self.fbEmail
vc!.fullname.text = self.fbName
CreateAccountVCs textfields have not been created at the moment when their .text attribute is being updated here, the textfields are nil at this point in time.
Evaluate passing the String objects retrieved from Graph API directly to CreateAccountVC & then using them to update the textfields.
Consider morphing existing implementation to something on these lines:
class CreateAccountVC: UIViewController {
var fbName:String!
var fbEmail:String!
#IBOutlet weak var fullname: UITextField!
#IBOutlet weak var username: UITextField!
#IBOutlet weak var age: UITextField!
...
The snippet mentioned above here would change to:
func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let vc = segue.destination as? CreateAccountVC
vc!.fbName = self.fbName
vc!.fbEmail = self.fbEmail
...
Please keep in mind that this is the first time I have used this website.
I am a complete beginner in coding who, somehow, ended up responsible for creating an app for a high-school level competition. My knowledge is extremely limited and I have found it difficult to find clear tutorials on how to use a CloudKit database.
My task for this specific portion of my application was to make a "Create a Profile" page, where users can input information that will then be stored and displayed in other ViewControllers of the application.
Most of the code related to the database was given by a teacher (taken out from the project of another group), yet its use was not explained. So, I simply tried to copy it and adapt it to the best of my abilities.
However, when running the simulator and creating a test profile, nothing happens once the save button is clicked.
My current code is as follows:
import UIKit
import CloudKit
class ProfileViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
let database = CKContainer.defaultContainer().publicCloudDatabase
#IBOutlet weak var profileType: UISegmentedControl!
#IBOutlet weak var descriptionTextfield: UITextField!
#IBOutlet weak var nameTextfield: UITextField!
#IBOutlet weak var addressTextfield: UITextField!
#IBOutlet weak var emailTextfield: UITextField!
#IBOutlet weak var passwordTextfield: UITextField!
#IBOutlet weak var phoneTextfield: UITextField!
#IBOutlet weak var saveButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated
}
#IBAction func saveProfile(sender: AnyObject) {
let newrecord = CKRecord(recordType: "PotLuck")
newrecord.setObject(nameTextfield.text as CKRecordValue?, forKey: "CompanyName")
newrecord.setObject(addressTextfield.text as CKRecordValue?, forKey: "CompanyLocation")
newrecord.setObject(emailTextfield.text as CKRecordValue?, forKey: "CompanyEmail")
newrecord.setObject(passwordTextfield.text as CKRecordValue?, forKey: "CompanyPassword")
newrecord.setObject(phoneTextfield.text as CKRecordValue?, forKey: "CompanyPhone")
switch profileType.selectedSegmentIndex
{
case 0:
newrecord.setObject("Business" as CKRecordValue?, forKey: "CompanyType")
case 1:
newrecord.setObject("Charity" as CKRecordValue?, forKey: "CompanyType")
default:
break;
}
database.saveRecord(newrecord, completionHandler: {newrecord, error in
if error != nil {
print("An error occured")
} else {
let newview = URLViewController(nibName: "URLViewControler", bundle: nil)
self.presentViewController(newview, animated: true, completion: nil)
}
}
)
}
Would anyone be able to point out whatever is missing or incorrect?
In my app I am using segue to pass data between two viewcontrollers and that should be easy enough, but for som reason I can`t see there I keep getting "Unresolved Identifier"
Her are some of the code that has to do with that function.
from ViewController 1
import UIKit
import CoreData
class ViewController: UIViewController, UITextFieldDelegate
{
#IBOutlet var panelWidthTextField: UITextField!
#IBOutlet var panelHightTextField: UITextField!
#IBOutlet var panelsWideTextField: UITextField!
#IBOutlet var panelsHightTextField: UITextField!
#IBOutlet var panelPitchTextField: UITextField!
#IBOutlet var calculateButton: UIButton!
#IBOutlet var resultWithLabel: UILabel!
#IBOutlet var resultHightLabel: UILabel!
#IBOutlet var fillAllFieldsLabel: UILabel!
var pawidth:String!
var pahight:String!
var papitch:String!
override func viewDidLoad()
{
super.viewDidLoad()
panelWidthTextField.text = pawidth
panelHightTextField.text = pahight
panelPitchTextField.text = pap itch
From Second ViewController
import UIKit
import CoreData
class DataBase: UIViewController, UITextFieldDelegate
{
#IBOutlet var makerTextField: UITextField!
#IBOutlet var modelTextField: UITextField!
#IBOutlet var stPanelWidthTextField: UITextField!
#IBOutlet var stPanelHightTextField: UITextField!
#IBOutlet var stPitchTextField: UITextField!
let moc = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
// Removes keyboard when touch outside edit field.
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
view.endEditing(true)
super.touchesBegan(touches, withEvent: event)
}
#IBAction func saveButton(sender: UIButton)
{
let ed = NSEntityDescription.entityForName("Ledinfo", inManagedObjectContext: moc)
let model = Ledinfo(entity:ed!, insertIntoManagedObjectContext:moc)
model.manufactor = makerTextField.text
model.model = modelTextField.text
model.panelwidth = stPanelWidthTextField.text
model.panelhight = stPanelHightTextField.text
model.pitch = stPitchTextField.text
do {
try moc.save()
makerTextField.text = ""
modelTextField.text = ""
stPanelWidthTextField.text = ""
stPanelHightTextField.text = ""
stPitchTextField.text = ""
Alert.show("Succsess", message: "Your Record Is Saved", vc: self)
}
catch _ as NSError
{
Alert.show("Failed", message: "Something Went Wrong", vc: self)
}
}
#IBAction func searchButton(sender: UIButton)
{
let ed = NSEntityDescription.entityForName("Ledinfo", inManagedObjectContext: moc)
let req = NSFetchRequest()
req.entity = ed
let cond = NSPredicate(format: "manufactor = %#", makerTextField.text!)
req.predicate = cond
do {
let result = try moc.executeFetchRequest(req)
if result.count > 0
{
let model = result[0] as! Ledinfo
makerTextField.text = model.manufactor
modelTextField.text = model.model
stPanelWidthTextField.text = model.panelwidth
stPanelHightTextField.text = model.panelhight
stPitchTextField.text = model.pitch
} else
{
Alert.show("Failed", message: "No Record Is Found", vc: self)
}
} catch _ as NSError!
{
Alert.show("Failed", message: "No Record Is Found" , vc: self)
}
}
#IBAction func transfereButton(sender: UIButton) {
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
if (segue.identifier == "transfereButton") {
let svc = segue.destinationViewController as! ViewController
svc.pawidth = stPanelWidthTextField.text
svc.pahight = stPanelHightTextField.text
svc.papitch = stPitchTextField.text
}
}
}
It can not find panelWidthTextField.text, panelHightTextField.text and panelPitchTextField.text as identifier.
I have check spelling and just can`t seem to be able to find what is missing.
Any help is appreciated
"Segue" means, that in "prepareForSegue" method you set the property of ViewController to some data in your DataBase controller. In your example, this can be done like this:
svc.pawidth = someDataFromDataBaseWhichYouWantToPassToSecondVC
svc.pahight = someDataFromDataBaseWhichYouWantToPassToSecondVC
svc.papitch = someDataFromDataBaseWhichYouWantToPassToSecondVC
And then, you can manipulate this data from your ViewController class.
You mistake that you are not passing the data from one VC to another, instead of that you are trying to set the property of 1stVC to another property of 1stVC, and there is no segue needed.
This has nothing to do with segues. do you have 3 text fields in your DataBase class with names panelWidthTextField, panelHightTextField and panelPithcTextField? It's complaining about not being able to find those variables.
You should call the performSegueWithIdentifier("transfereButton", sender: nil) inside your transfereButton IBOutlet action to actually make the prepareForSegue to run.