Resize cell when click on custom button in Swift 4 - ios

Question

I have a view controller in which i have used table view controller in it. In my cell there is a button on which when user click the cell size should come to 550 and when click again it should come back to its original height. I have tried bit code after searching for it but it isn't working is their any solution that can work for me?. My code is bit this,
var indexOfCellToExpand: Int!
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if indexPath.row == indexOfCellToExpand {
return 170 + expandedLabel.frame.height - 38
}
return 170
}

Answer 1

Use Auto layout for Expand-collapse Cell,
Attaching Demo for that case
link:https://www.dropbox.com/s/ieltq0honml35l8/TAbleDemo.zip?dl=0.
set cell button height constraint and update constraint on Value on select- deselect event and just reload data
in main viewcontroller code
self.tblView.estimatedRowHeight = 100
self.tblView.rowHeight = UITableViewAutomaticDimension
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TblCell", for: indexPath) as! TblCell
cell.btnExpandCollepse.addTarget(self, action: #selector(ViewController.expandCollapse(sender:)), for: .touchUpInside)
return cell
}
#objc func expandCollapse(sender:UIButton) {
self.tblView.reloadData()
}
Code in Cell Class
#IBOutlet var btnExpandCollepse: UIButton!
#IBOutlet var constraintBtnHeight: NSLayoutConstraint!
#IBAction func onExpandCollepse(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
if !sender.isSelected{
self.constraintBtnHeight.constant = 50
}else{
self.constraintBtnHeight.constant = 500
}
}
for constraint check below image
http://prntscr.com/hur8ym
Updated Demo for custom Content height of Lable with Autoresizing Cell
https://www.dropbox.com/s/o742kflg5yeofb8/TAbleDemo%202.zip?dl=0
https://www.dropbox.com/s/o742kflg5yeofb8/TAbleDemo%202.zip?dl=0

Answer 2

Swift 4.x
fileprivate var expandedIndexSet = Set<IndexPath>()
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if expandedIndexSet.contains(indexPath) {
let cell = tableView.dequeueReusableCell(withIdentifier: "CELL_EXPANDED", for: indexPath) as! CellExpanded
return cell
} else {
let cell = tableView.dequeueReusableCell(withIdentifier: "CELL_COLLAPSED", for: indexPath) as! CellCollapsed
return cell
}
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: false)
if expandedIndexSet.contains(indexPath) {
expandedIndexSet.remove(indexPath)
} else {
expandedIndexSet.insert(indexPath)
}
tableView.reloadRows(at: [indexPath], with: .fade)
}