ios - Hide and Show TableViewCells properly? -


i in process of making table view controller app , has different headers. using custom header view has button inside it. button used show rows section. save section number of each header in tag property of button.

i have looked @ more 20 posts set height 0 , hide cell. ridiculous auto layout produce tons of errors , make app lag lot.

what did make 2 different cells. 1 used show data , other 1 empty cell height of 0.

then in code have variable called opensection , holds current open section number.

so when click on button current section closes , new 1 opens. there lots , lots of issues. instance if scroll cells keep changing. next problem fact if open last header, cannot scroll first header weird.

this function when button tapped 

func buttontapped(_ sender: uibutton) {     dispatchqueue.main.async {         self.opensection = sender.tag         self.tableview.reloaddata()         self.tableview.beginupdates()         self.tableview.endupdates()     }     print("button tapped")  }

this cellforrowat function 

    if opensection == indexpath.section {         print("cellforrowat")         print(opensection)         let cell = tableview.dequeuereusablecell(withidentifier: "treatmentcell", for: indexpath) as! treatmenttableviewcell         cell.name.text = self.treatments[indexpath.section].treatments[indexpath.row].name         cell.price.text = self.treatments[indexpath.section].treatments[indexpath.row].price         cell.details.text = self.treatments[indexpath.section].treatments[indexpath.row].details         return cell      } else {         let cell = tableview.dequeuereusablecell(withidentifier: "emptycell", for: indexpath)         cell.ishidden = true         return cell     }

and heightforrowat function

    if opensection == indexpath.section {         print("heightforrowat")         print(opensection)          return self.tableview.rowheight     } else {         return 0     }

change code button tapped 

    self.opensection = sender.tag     let index = indexpath(row: 0, section: opensection)      dispatchqueue.main.async {         self.tableview.reloaddata()         self.tableview.reloadsections(indexset(integer: self.opensection), with: .automatic)         self.tableview.scrolltorow(at: index, at: .top, animated: true)     }

and change number of rows in section code below 

override func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {     // #warning incomplete implementation, return number of rows     if opensection == section {         return self.treatments[opensection].treatments.count      } else {         return 0     } }

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