ios - Done button of UIPickerView doesn't work -

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i'm trying put done button picker view because, when slide choose item uipickerview automatically select slided row, prefer have button done:

@iboutlet var tfprojet: uitextfield! var pvprojetdata = ["-choisir-", "rachat de crédits", "renégociation de crédits"] override func viewdidload() {      super.viewdidload()      let pickerview = uipickerview()      if devicetype.is_iphone_4_or_less {         pickerview.frame=cgrectmake(0, 200, view.frame.width, 100)     } else if devicetype.is_iphone_5 {         pickerview.frame=cgrectmake(0, 200, view.frame.width, 200)     } else if devicetype.is_iphone_6 {         pickerview.frame=cgrectmake(0, 200, view.frame.width, 200)     } else if devicetype.is_iphone_6p {         pickerview.frame=cgrectmake(0, 200, view.frame.width, 250)     } else if uidevice.currentdevice().userinterfaceidiom == .pad {         pickerview.frame=cgrectmake(0, 200, view.frame.width, 300)     }      //        pickerview.backgroundcolor = .whitecolor()      pickerview.showsselectionindicator = true     pickerview.delegate = self     pickerview.datasource = self     self.pickerview = pickerview           let pickertoolbar = uitoolbar()         pickertoolbar.barstyle = uibarstyle.black //you can change style         pickertoolbar.translucent = true         pickertoolbar.tintcolor = uicolor.whitecolor() // or other colours         pickertoolbar.sizetofit()          let spacebuttonpicker = uibarbuttonitem(barbuttonsystemitem: uibarbuttonsystemitem.flexiblespace, target: nil, action: nil)         let cancelbuttonpicker = uibarbuttonitem(title: "ok", style: uibarbuttonitemstyle.plain, target: self, action: "canceldatepicker:")         pickertoolbar.setitems([cancelbuttonpicker, spacebuttonpicker], animated: false)         pickertoolbar.userinteractionenabled = true         tfdatenaissance.inputaccessoryview = pickertoolbar            tfprojet.inputview = pickerview           tfprojet.inputaccessoryview = pickertoolbar }  func numberofcomponentsinpickerview(pickerview: uipickerview) -> int{     return 1 }   func selectrow(row: int, incomponent component: int, animated: bool){  }  func updatepicker(){     self.pickerview!.reloadallcomponents()     pickerview.selectrow(0, incomponent: 0, animated: false) }  func pickerview(pickerview: uipickerview, numberofrowsincomponent component: int) -> int {      if tfprojet.isfirstresponder(){         return pvprojetdata.count     }     return 1 }  func pickerview(pickerview: uipickerview, titleforrow row: int, forcomponent component: int) -> string? {      if tfprojet.isfirstresponder(){         return pvprojetdata[row]     }     return "" }  func pickerview(pickerview: uipickerview, didselectrow row: int, incomponent component: int) {      if tfprojet.isfirstresponder(){         let itemselected = pvprojetdata[row]         tfprojet.text = itemselected         self.tfprojet.endediting(true)     } }

i see button ok, doesn't work, when slide row automatically selected.


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