ios - UITableViewCell Segue not Working -

i'm making app have uitableview user adds data to, , want user able tap on cell , see more details cell chose. set segue cell celldetailcontroller later add details of cell chose. when run app , try tap on cell segue, selects cell , nothing happens. doing wrong here? here storyboard set up:

(i cant upload pictures yet here's link) http://tinypic.com/r/2ivcwsj/8

heres code class connected tableview:

import uikit  typealias eventtuple = (name: string, date: string)  var eventlist : [eventtuple] = []      class tableviewcontroller: uiviewcontroller, uitableviewdelegate {          @iboutlet weak var eventtable: uitableview!          override func viewdidload() {             super.viewdidload()          }          override func viewdidappear(animated: bool) {             eventtable.reloaddata()           }          override func didreceivememorywarning() {             super.didreceivememorywarning()             // dispose of resources can recreated.         }          // mark: - table view data source            func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {             // #warning incomplete method implementation.             // return number of rows in section.             return eventlist.count         }           func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {             let cell = uitableviewcell(style: uitableviewcellstyle.subtitle, reuseidentifier: "cell")              cell.textlabel?.text = eventlist[indexpath.row].name             cell.detailtextlabel?.text = eventlist[indexpath.row].date              return cell         }            /*         // override support editing table view.         override func tableview(tableview: uitableview, commiteditingstyle editingstyle: uitableviewcelleditingstyle, forrowatindexpath indexpath: nsindexpath) {             if editingstyle == .delete {                 // delete row data source                 tableview.deleterowsatindexpaths([indexpath], withrowanimation: .fade)             } else if editingstyle == .insert {                 // create new instance of appropriate class, insert array, , add new row table view             }             }         */          /*         // override support rearranging table view.         override func tableview(tableview: uitableview, moverowatindexpath fromindexpath: nsindexpath, toindexpath: nsindexpath) {          }         */          /*         // override support conditional rearranging of table view.         override func tableview(tableview: uitableview, canmoverowatindexpath indexpath: nsindexpath) -> bool {             // return no if not want item re-orderable.             return true         }         */           // mark: - navigation          // in storyboard-based application, want little preparation before navigation         override func prepareforsegue(segue: uistoryboardsegue, sender: anyobject?) {             if(segue.identifier == "showdetailsegue") {              }              }     } 

drag segue tableviewcontroller (the yellow icon on top of viewcontroller), not tablecell. give segue identifier.

override didselectrowatindexpath , perform segue here via performseguewithidentifier()

override func tableview(tableview: uitableview, didselectrowatindexpath indexpath: nsindexpath) {     // pass object parameter, i.e. tapped row     performseguewithidentifier("showdetailsegue", sender: indexpath.row) }