Simulator and iOS device tableView Firebase - ios

Question

I am making a chat room app. Right now every chat post can only be seen by the user who posted it. How do i make the table view permanent and for all users to see not just the current user. Like a live feed.
Exaple of what i need to show on all devices not just the test device:
import UIKit
import Foundation
import Firebase
import FirebaseDatabase
import FirebaseStorage
struct postStruct {
let username : String!
let message : String!
let photoURL : String!
}
class GeneralChatroom: UIViewController, UITableViewDataSource, UITableViewDelegate, UITextFieldDelegate {
#IBOutlet weak var messageTextField: UITextField!
var generalRoomDataArr = [postStruct]()
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 140
let ref = FIRDatabase.database().reference()
let userID = FIRAuth.auth()?.currentUser?.uid
ref.child("general_room").child("chat").child(userID!).queryOrderedByKey().observe(.childAdded, with: {snapshot in
let snapDict = snapshot.value as? NSDictionary
let username = snapDict?["Username"] as? String ?? ""
let message = snapDict?["Message"] as? String ?? ""
let firebaseUserPhotoURL = snapDict?["photo_url"] as? String ?? ""
self.generalRoomDataArr.insert(postStruct(username: username, message: message, photoURL: firebaseUserPhotoURL), at: 0)
self.tableView.reloadData()
})
}
#IBAction func backButtonPressed(_ sender: UIButton) {
self.performSegue(withIdentifier: "BackToRoom", sender: nil)
}
//Message Send button is pressed data uploaded to firebase
#IBAction func sendButtonPressed(_ sender: UIButton) {
let message : String = self.messageTextField.text!
UploadGeneralChatRoom(message: message) //upload to general_room
self.messageTextField.text = nil
messageTextField.resignFirstResponder()//Quit keyboard
self.tableView.reloadData() //Reload tableView
//UploadUserData() //Update Rank in database
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return generalRoomDataArr.count // your number of cell here
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")
let usernameLabel = cell?.viewWithTag(1) as! UILabel
usernameLabel.text = generalRoomDataArr[indexPath.row].username
let messageLabel = cell?.viewWithTag(2) as! UILabel
messageLabel.numberOfLines=0 // line wrap
messageLabel.lineBreakMode = NSLineBreakMode.byWordWrapping
messageLabel.text = generalRoomDataArr[indexPath.row].message
//initialize UI Profile Image
let imageView = cell?.viewWithTag(3) as! UIImageView
//Make Porfile Image Cirlce
imageView.layer.cornerRadius = imageView.frame.size.width/2
imageView.clipsToBounds = true
//User Profile image in tableview
if generalRoomDataArr[indexPath.row].photoURL != nil
{
//let imageView = cell?.viewWithTag(3) as! UIImageView
if let url = NSURL(string: generalRoomDataArr[indexPath.row].photoURL) {
if let data = NSData(contentsOf: url as URL) {
imageView.image = UIImage(data: data as Data)
}
}
}
// your cell coding
return cell!
}
}//END CLASS

Answer 1

Try this code - Obj-C
[[[self.reference child:#"general_room"] child:#"chat"] observeSingleEventOfType:FIRDataEventTypeValue withBlock:^(FIRDataSnapshot * _Nonnull snapshot) {
if (snapshot.value != (id)[NSNull null]) {
NSArray *value = [snapshot.value allValues];
NSLog(#"%#", [value valueForKey:#"Username"]);
NSLog(#"%#", [value valueForKey:#"Message"]);
NSLog(#"%#", [value valueForKey:#"photo_url"]);
}
} withCancelBlock:^(NSError * _Nonnull error) {
NSLog(#"%#", error.localizedDescription);
}];
In swift
Check with syntax am not sure about swift syntax
ref.child("general_room").child("chat").observeSingleEvent(of: .value, with: { (snapshot) in
let value = snapshot.value as? NSArray
for (dict in value) {
let username = dict?["Username"] as? String
let message = dict?["Message"] as? String
let photo_url = dict?["photo_url"] as? String
print(username)
print(message)
print(photo_url)
}
}) { (error) in
print(error.localizedDescription)
}}