ios - UIPickerView showing empty grey box Swift -

i haven't whole lot of code, might copy here.

class viewcontroller: uiviewcontroller, uipickerviewdelegate, uipickerviewdatasource{      var buildings = ["bankbuilding", "cinema" , "cornershop", "greg's house"]      @iboutlet weak var buildtext: uitextfield!      var buildpickers:uipickerview = uipickerview()      override func viewdidload() {         super.viewdidload()          buildpickers = uipickerview()         buildpickers.delegate = self         buildpickers.hidden = true;         buildtext.inputview = buildpickers         buildtext.text = buildings[0]             }      func numberofcomponentsinpickerview(pickerview: uipickerview) -> int{         return 1     }      func pickerview(pickerview: uipickerview, numberofrowsincomponent component: int) -> int{         println("count: \(buildings.count)")         return buildings.count     }      func pickerview(pickerview: uipickerview, titleforrow row: int, forcomponent component: int) -> string! {         println("creating title: \(buildings[row])")         return buildings[row]     }      func pickerview(pickerview: uipickerview, didselectrow row: int, incomponent component: int)     {         println("selected: \(buildings[row])")         buildtext.text = buildings[row]         buildpickers.hidden = true;     }      func textfieldshouldbeginediting(textfield: uitextfield) -> bool {         buildpickers.hidden = false         return false     } } 

the print statements correct. numberofrows... , titleforrow printing correct strings.

but there no prints didselectrow because, well, can't select row.

this get:

you can ignore google map in background, shouldn't interfere picker view , set in storyboard.

the grey window appears when click on textfield never shows content. print statements otherwise.

does know why case?

just add line in viewdidload method:

buildpickers.datasource = self 

and code be:

override func viewdidload() {     super.viewdidload()      buildpickers = uipickerview()     buildpickers.delegate = self     buildpickers.datasource = self     buildpickers.hidden = true;     buildtext.inputview = buildpickers     buildtext.text = buildings[0]         } 

and show data.

update:

it not showing because set hidden in viewdidload.

just remove line code:

buildpickers.hidden = true 

here working code:

import uikit  class viewcontroller: uiviewcontroller, uipickerviewdelegate, uipickerviewdatasource, uitextfielddelegate{      var buildings = ["bankbuilding", "cinema" , "cornershop", "greg's house"]      @iboutlet weak var buildtext: uitextfield!      var buildpickers:uipickerview = uipickerview()      override func viewdidload() {         super.viewdidload()          buildpickers = uipickerview()         buildpickers.delegate = self         buildpickers.hidden = true         buildtext.delegate = self        //set delegate textfield         buildtext.inputview = buildpickers         buildtext.text = buildings[0]     }      func numberofcomponentsinpickerview(pickerview: uipickerview) -> int{         return 1     }      func pickerview(pickerview: uipickerview, numberofrowsincomponent component: int) -> int{         println("count: \(buildings.count)")         return buildings.count     }      func pickerview(pickerview: uipickerview, titleforrow row: int, forcomponent component: int) -> string! {         println("creating title: \(buildings[row])")         return buildings[row]     }      func pickerview(pickerview: uipickerview, didselectrow row: int, incomponent component: int)     {         println("selected: \(buildings[row])")         buildtext.text = buildings[row]         buildpickers.hidden = true;     }       //this method call when click on textfield     func textfieldshouldbeginediting(textfield: uitextfield) -> bool {         buildpickers.hidden = false         return true     } }