swift - how to get the .child key in an array? -

i want take save of blocked user child string in code. simple might sound not able figure out.

static func block(myself: string, posteruid:  string){     var blockeduserref = database.database().reference().child("users").child(myself).child("blockedusers").child(posteruid)     blockeduserref.setvalue(true)      var blokedarray:[string] = []     var handle:databasehandle!      blockeduserref = database.database().reference()     handle = blockeduserref.child("blockedusers").observe(.childadded, with:{ (datasnapshot) in         if let item = datasnapshot.value as? string{             blokedarray.append(item)         }     })    } 

i want take array of blocked users go through in loop , filter them showing.

ref.observesingleevent(of: .value, with: { (snapshot) in         guard let snapshot = snapshot.children.allobjects as? [datasnapshot]             else { return completion([]) }          // 3 filter user array         let users =             snapshot                 .flatmap(user.init)                 .filter { $0.uid != currentuser.uid } 

here firebase:

 "users" : {     "3ylvuda8ynsuvyutxv6cvoqpsjm1" : {        "username" : "🌸😍🌸"     },     "4duy2hhtv5s7ssxtzybfip7jblz1" : {       "username" : "love nyc"     },     "58t0m2fxxhg6grt96vvbkmfhrko2" : {       "blockedusers" : {         "4duy2hhtv5s7ssxtzybfip7jblz1" : true,         "sqarodpjuydcdv6dexteidzkare2" : true       },       "username" : "istandwithyou"     }, 

some new ways trying debugged , seems not saving onto array

     ///adedblock         var blockeduserref = database.database().reference().child("users").child(currentuser.uid).child("blockedusers")           var blokedarray:[string] = []         var handle:databasehandle!          blockeduserref = database.database().reference()         handle = blockeduserref.child("blockedusers").observe(.childadded, with:{ (datasnapshot) in             if let item = datasnapshot.value as? string{                 blokedarray.append(item)             }         })          user in blokedarray{             let users =                 snapshot                     .flatmap(user.init)                     .filter { $0.uid != user }         } 

this can done saving of child entries of blockedusers array hold strings.

to this, first create empty array like

mylist:[string] = [] 

then, need create reference firebase database like:

var ref: databasereference! 

you need database handle navigate around database:

var handle:databasehandle! 

now, need go viewdidload function , add code like:

ref = database.database().reference()     handle = ref?.child("blockedusers").observe(.childadded, with:{ (datasnapshot) in         if let item = datasnapshot.value as? string{             self.mylist.append(item)         }     }) 

this piece of code checking whether entry added child database "blockedusers", , that, adding whatever entered array.

now, have array filled whatever in child database, blockedusers. can use array in uitableview, or list in label.

hope helped!