ios - Programmatically added UITableView won't populate data -

i wish create uitableview , custom cell, , add them uiviewcontroller.

if layout uitableview storyboard onto uiviewcontroller, everything works fine custom cell.

but realized animation regarding height not smooth - table view disappears

so decided create/destroy uitableview everytime wish animation, , add subview uiviewcontroller.

but programmatically-added uitableview won't populate data.

what doing wrong here?

import uikit  class viewcontroller: uiviewcontroller, uitableviewdelegate, uitableviewdatasource {  var dataarr = [string]() // holds data uitableview var tv: uitableview!     // notice it's not @outlet  override func viewdidload() {     super.viewdidload()       dataarr = ["one", "two", "three"]       // create , add uitableview drop down     tv = uitableview()     tv.delegate = self     tv.datasource = self      createtableview() }  func createtableview() {     let w = uiscreen.mainscreen().bounds.size.width     tv.frame = cgrectmake(0, 50, w, 0)     tv.rowheight = 25.0      // register custom cell     var nib = uinib(nibname: "searchcell", bundle: nil)     tv.registernib(nib, forcellreuseidentifier: "searchcell")      self.view.addsubview(tv)      uiview.animatewithduration(0.2, delay: 0.0, options: uiviewanimationoptions.beginfromcurrentstate, animations: {             self.tv.frame.size.height = 100         }, completion: { (didfinish) in             self.tv.reloaddata()         }) }  func destroytableview() {     uiview.animatewithduration(0.2, animations:         {             // hide             self.tv.frame.size.height = 0         }, completion: { (didfinish) in             self.tv.removefromsuperview()     }) }  // mark: - uitableview func numberofsectionsintableview(tableview: uitableview) -> int {     return 1 }  func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {     return dataarr.count }  func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     let cell: searchcell = self.tv.dequeuereusablecellwithidentifier("searchcell") as! searchcell     cell.celllabel.text = dataarr[indexpath.row]     return cell; } } 

i think problem line.

self.tv.frame.size.height = 100 

try setting whole frame instead of height. pretty sure uiview's frame's properties read only.

see here

if doesn't work. maybe try implementing

func tableview(_ tableview: uitableview, heightforrowatindexpath indexpath: nsindexpath) -> cgfloat