ios - Inserting rows on a static UITableView -

i'm trying add row static table, i'm getting error:

2015-05-31 13:53:13.153 notify[30565:6091085] *** terminating app due uncaught exception 'nsrangeexception', reason: '*** -[__nsarrayi objectatindex:]: index 2 beyond bounds [0 .. 1]'

i have @ibaction (connected uinavigationitem) add row:

@ibaction func addrow(sender: anyobject) {     let indexpath = nsindexpath(forrow: rowcount, insection: 0)     rowcount += 1     rowadded = true      tableview.insertrowsatindexpaths([indexpath], withrowanimation: .fade) } 

with attributes rowcount (default in ib design), , bool work out if next row has been added yet:

class notifytableviewcontroller: uitableviewcontroller {   var rowcount = 2   var rowadded = false   ... } 

the table has 1 section, , numberofrowsinsection: method i've added:

override func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {   if rowadded {     return 3   }else {     return 2   } } 

and finally, cellforrowatindexpath:

override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     if indexpath.row == 2 {         var cell: uitableviewcell! = tableview.dequeuereusablecellwithidentifier("customcell") as? uitableviewcell          if cell == nil {             cell = uitableviewcell(style: .default, reuseidentifier: "customcell")             cell.textlabel!.text = "new cell"         }          return cell     }else {         return super.tableview(tableview, cellforrowatindexpath: indexpath)     } } 

i've tried wrapping insertrowsatindexpaths call in begin/endupdates, same error. idea problem is?

ok, add rows static table needed implement intentationlevelforrowatindexpath: , heightforrowatindexpath:

override func tableview(tableview: uitableview, indentationlevelforrowatindexpath indexpath: nsindexpath) -> int {     if indexpath.row == 2 {         let path = nsindexpath(forrow: 0, insection: indexpath.section)         return super.tableview(tableview, indentationlevelforrowatindexpath: path)     }      return super.tableview(tableview, indentationlevelforrowatindexpath: indexpath) }  override func tableview(tableview: uitableview, heightforrowatindexpath indexpath: nsindexpath) -> cgfloat {     if indexpath.row == 2 {         return 42     }      return super.tableview(tableview, heightforrowatindexpath: indexpath) }