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我在製作一個聊天室應用程序。現在每個聊天帖子只能由發佈該帖子的用戶看到。我如何使表格視圖成爲永久的,並讓所有用戶不僅看到當前用戶。像活飼料一樣。模擬器和iOS設備tableView Firebase
的exaple什麼,我需要在所有設備上顯示不只是測試設備:
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
模擬器無法接收通知。在兩個真實設備上測試您的應用。 – Adeel
你使用Socket還是REST? – chengsam
也許我需要更好的探索。當我發送一條消息並將其發佈到UITableView時,我該如何持久保存它。所以當有人發佈到聊天室時,它永遠不會消失。 – nil