ios - inserting row into a tableview from viewdidload -


i have uiviewcontroller tableview in it. im trying query through users in firebase data base keep getting error:

'nsinternalinconsistencyexception', reason: 'attempt insert row 1 section 0, there 0 rows in section 0 after update'

i looked , tried beginupdates , endupdates methods same error on line call endupdates. ideas why happening?

heres code: 

searchcontroller.searchresultsupdater = self searchcontroller.dimsbackgroundduringpresentation = false searchcontroller.definespresentationcontext = true definespresentationcontext = true self.browsetable.tableheaderview = searchcontroller.searchbar        ref.child("users").queryordered(bychild: "name").observe(.childadded, with: { (snapshot) in          self.usersarray.append(snapshot.value as? nsdictionary)          //insert rows         //self.browsetable.beginupdates()          //where error occurs         self.browsetable.insertrows(at: [indexpath(row:self.usersarray.count - 1,section: 0)], with: .automatic)          //self.browsetable.endupdates()   }) { (error) in     print("error: \(error.localizeddescription)")  }

as discussed in comments regarding problem, crash caused due value returned in function func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int not matching number of rows after inserting rows.

in cases value returned in numberofrowsinsection function based on datasource object, updating datasource object before inserting/deleting rows resolve problem.

feel free suggest edits :)


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