swift - Add custom cell to only one case of Segmented Controller -

i have question adding additional custom cell 1 case segmented controller. want add "add item" action cell tableview on case 3 segmented controller. know how implement or can find resource (besides apple documentation) see how this. thanks!

import uikit

class viewcontroller: uiviewcontroller, uitableviewdatasource, uitableviewdelegate {

@iboutlet weak var mysegmentedcontrol: uisegmentedcontrol! @iboutlet weak var mytableview: uitableview!  let globallist: [string] = ["global item 1","global item 2", "global item 3"] let friendslist: [string] = ["friend 1", "friend 2", "friend 3"] let melist: [string] = ["milan, italy", "rome, italy", "napoli, italy", "paris, france"]  let addbutton: [string] = ["+ add item"]  override func viewdidload() {     super.viewdidload()     // additional setup after loading view, typically nib. }  override func didreceivememorywarning() {     super.didreceivememorywarning()     // dispose of resources can recreated. }       func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {       var returnvalue = 0      switch(mysegmentedcontrol.selectedsegmentindex)     {      case 0:         returnvalue = globallist.count         break      case 1:         returnvalue = friendslist.count         break      case 2:          // *** want add cell here "add item" ibaction ---------------------          returnvalue = melist.count         break      default:         break      }      return returnvalue  }    @available(ios 2.0, *) func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     let mycell = tableview.dequeuereusablecellwithidentifier("mycell", forindexpath: indexpath)      switch(mysegmentedcontrol.selectedsegmentindex)      {     case 0:         mycell.textlabel!.text = globallist[indexpath.row]         break      case 1:         mycell.textlabel!.text = friendslist[indexpath.row]         break      case 2: 

// *** want add cell here "add item" ibaction ---------------------

        mycell.textlabel?.text = melist[indexpath.row]         break      default:         break      }      return mycell  } 

to add new cell in 3rd segment case following changes in code.

in switch case statement,

func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {   case 2:     returnvalue = melist.count +1      break } 

now in cellforrowatindexpath

func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {    let mycell = tableview.dequeuereusablecellwithidentifier("mycell", forindexpath: indexpath)     switch(mysegmentedcontrol.selectedsegmentindex)    {        case 2:        if(indexpath.row == melist.count) {          mycell.textlabel?.text = "add item"            // add new row here           /* or add new button here cell's subview  */            // set frame of button            // set target , selector method of button            [cell addsubview: addbutton]        }        else {           mycell.textlabel?.text = melist[indexpath.row]        }          break    } 

in didselectrowatindexpath if didn't use button approach.

func tableview(tableview: uitableview, didselectrowatindexpath indexpath: nsindexpath) {   switch(mysegmentedcontrol.selectedsegmentindex)  {    case 2:    if(indexpath.row == melist.count) {      // work here, click event of "add item" cell    }   } }