ios - Firebase - sort posts by number of keys and show in TableView -

i have made app save users message , username firebase childbyautoid key. inside there childs saves username, message, likes , postid (as can see on image below).

after lot of research , lot of trying writing code myself, figure out likes need saved autoid keys inside separate child , have count keys number of likes (you'll see child on image under , child named "liked")

everything displayed in tableview cell. of them displayed randomly ok (i prefer ordered date added), loaded data in next next vc displayed as:

top 10 of week top 10 of month best etc...

there'll separate button menu , when press it, you'll presented next vc contain table view same data, time sorted liked post.

this code writes keys liked child path (when pressed on loaded data firebase database):

    @ibaction func likepressed(_ sender: any) {      let ref = database.database().reference()     self.likebutton.isenabled = false     let key = ref.child("frusters").childbyautoid().key      ref.child("frusters").child(self.postid).observesingleevent(of: .value, with: { (snapshot) in                  let updatelikes = ["liked/\(key)" : key] [string : any]                     ref.child("frusters").child(self.postid).updatechildvalues(updatelikes, withcompletionblock: { (error, reff) in                          if error == nil {                             ref.child("frusters").child(self.postid).observesingleevent(of: .value, with: { (snap) in                         if let properties = snap.value as? [string : anyobject] {                         if let likes = properties["liked"] as? [string : anyobject] {                          let count = likes.count                         self.likelabel.text = "\(count) likes"                          let update = ["likes" : count]                         ref.child("frusters").child(self.postid).updatechildvalues(update)                          self.likebutton.ishidden = true                         self.unlikebutton.ishidden = false                         self.likebutton.isenabled = true                         }                     }                 })             }         })     })      ref.removeallobservers() } 

and code loads data , put in table view:

    func loaddata() {     self.fetchposts.removeall()     let ref = database.database().reference()     ref.child("frusters").observesingleevent(of: .value, with: { (snapshot) in         if let postdict = snapshot.value as? [string:anyobject] {             (_,postelement) in postdict {                 print(postelement);                 let post = post()                 post.username = postelement["username"] as? string                 post.message = postelement["message"] as? string                 post.likes = postelement["likes"] as? int                 post.postid = postelement["postid"] as? string                 self.fetchposts.append(post)             }         }         self.tableview.reloaddata()      }) { (error) in         print(error.localizeddescription)     }     ref.removeallobservers() }  func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {     return self.fetchposts.count }  func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell {     let cell = tableview.dequeuereusablecell(withidentifier: "cell")  as! posttableviewcell      cell.messagelabel.text = self.fetchposts[indexpath.row].message     cell.usernamelabel.text = self.fetchposts[indexpath.row].username      cell.likelabel.text = "\(self.fetchposts[indexpath.row].likes!) likes"     cell.postid = self.fetchposts[indexpath.row].postid      cell.bckgview.layer.cornerradius = 0      cell.bckgview.layer.shadowoffset = cgsize(width: 0, height: 1)     cell.bckgview.layer.maskstobounds = false     cell.bckgview.layer.shadowcolor = uicolor.black.cgcolor     cell.bckgview.layer.shadowopacity = 0.3     cell.bckgview.layer.shadowradius = 4      return cell }  func tableview(_ tableview: uitableview, heightforrowat indexpath: indexpath) -> cgfloat {     return uitableviewautomaticdimension; } 

well, problem not know how insert inside new uitableview top 10 post likes, sort them liked post next 9 of them likes.

also, possible sort them liked month or week? keys firebase database makes (by autoid) contain date of created post or have insert new child date inside , in code combine "date" child , "liked" child presented top 10 liked post between 1st , last of month?

thanks in advance. ;)