get data from firebase children - ios

Question

I have two custom cells in one table view.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Configure the cell...
if (indexPath.row == 0) {
let cell = tableView.dequeueReusableCell(withIdentifier: "Main", for: indexPath) as! PostTableViewCell
//Configure the cell
cell.PostView.layer.cornerRadius = 5
cell.PostView.layer.masksToBounds = false
cell.PostView.layer.shadowColor = UIColor.black.withAlphaComponent(0.4).cgColor
cell.PostView.layer.shadowOffset = CGSize(width: 0, height: 0)
cell.PostView.layer.shadowOpacity = 0.9
let post = Comments[indexPath.row] as! [String: AnyObject]
let commentname = post["author"] as? String
sendAuthor = post["author"] as? String
cell.CommentersName.setTitle(commentname, for: .normal)
if let seconds = post["pub_time"] as? Double {
let timeStampDate = NSDate(timeIntervalSince1970: seconds/1000)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM d, yyyy"
let formating = timeStampDate as Date
cell.CommentTime.text = dateFormatter.string(from: formating)
}
cell.comment.text = post["content"] as? String
textViewDidChange(cell.comment)
cell.comment.frame.size.width = 344
cell.comment.sizeToFit()
cell.comment.clipsToBounds = true
cell.REply.frame.origin.y = cell.comment.frame.maxY + 10
cell.PostView.frame.size.height = cell.comment.frame.maxY + 50
TableView.rowHeight = cell.PostView.frame.size.height + 20
cell.LikesNumber.text = post["num_likes"] as? String
replyId = post["id"] as? String
cell.checkfornightmode()
return cell
}
else{
let cell = tableView.dequeueReusableCell(withIdentifier: "Reply", for: indexPath) as! RepliesTableViewCell
cell.ReplyCustomCell.layer.cornerRadius = 5
cell.ReplyCustomCell.layer.masksToBounds = false
cell.ReplyCustomCell.layer.shadowColor = UIColor.black.withAlphaComponent(0.4).cgColor
cell.ReplyCustomCell.layer.shadowOffset = CGSize(width: 0, height: 0)
cell.ReplyCustomCell.layer.shadowOpacity = 0.9
let post = Comments[indexPath.row] as! [String: AnyObject]
let posttest = post["id"] as? String
let replyRef = Database.database().reference().child("main").child("posts").child(postID!).child("comments").child(posttest!).child("comments")
replyRef.observeSingleEvent(of: .value, with: { (snapshot:DataSnapshot) in
if let postsDictionary = snapshot .value as? [String: AnyObject] {
for testingkey in postsDictionary.keys {
Database.database().reference().child("main").child("posts").child(self.postID!).child("comments").child(posttest!).child("comments").child(testingkey).observeSingleEvent(of: .value, with: { (snapshot) in
let value = snapshot.value as? NSDictionary
let content : String? = value?["content"] as? String ?? ""
cell.ReplyText.text = content!
})
}
}
})
TableView.rowHeight = 150.0
return cell
}
}
The first cell with the identifier main is supposed to print out all the intial comments for a certain post. The second cell with the identifier is supposed to print out the comments to main comments. Based on this code, I am only getting the last comment of the main post and the last comment to the main posts.
This is what the json looks like

Answer 1

First thing is to separate the firebase call into a separate function and in that function populate a dictionary with posts as key and comments as value
for example like this
var postComments: [String: [String]] = [:] // post as key and string array as comments
In firebase database call populate this with snapshot.
After the data call but within the firebase Database call back use this function to reload data
DispatchQueue.main.async{
tableView.reloadData()
}
Set the cell with postComments array.