swift - Update tableview instead of entire reload when navigating back to tableview View Controller -

i have home uiviewcontroller contains uitableview. on view controller display games current user reading data firebase in viewwillappear. view controller user can press button start new game , button takes them next view controller select settings, updates data in firebase , adds new child. once navigate home view controller there anyway update data new child added instead of loading games table view again doing?

this current code:

override func viewwillappear(_ animated: bool) {     super.viewwillappear(animated)      if let currentuserid = auth.auth().currentuser?.uid {         let gamesref = database.database().reference().child("games").child(currentuserid)         self.games = []          gamesref.observesingleevent(of: .value, with: { snapshot in             child in snapshot.children {                 let game = child as! datasnapshot                 self.games.append(game)                 self.tableview.reloaddata()             }         })     } } 

i think can use observesingleevent , .childadded

you can loading of data in viewdidload , of single child in viewwillappear since viewdidload called once initially

since both methods called initially, can have bool flag can control code runs , not , since viewwillappear called after viewdidload change value of flag in viewwillappear method , control execution of code inside viewwillappear using flag

class somevc: uiviewcontroller {          var flag = false         override func viewwillappear(_ animated: bool) {                 super.viewwillappear(animated)                 if flag {                         //do work here                 }else {                    flag = true                 }          } } 

edited: solution can dont in viewdidload , work in viewwillappear since in particular scenario data in both calls related (fetching data firebase)

class somevc: uiviewcontroller {              var flag = false             override func viewwillappear(_ animated: bool) {                     super.viewwillappear(animated)                     if flag {                             //fetch 1 child                     }else {                             //fetch data                             flag = true                     }              }     }