swift - Dynamic List of items inside tableViewCell - ios

Question

What is the best practice to add dynamic list of items in UITableViewCell with showMore/showLess?
UITableView inside UITableViewCell
I used table view inside my UITableViewCell , but I have issue with reload row at indexPath causes jumpy scrolling.
TableViewController Code :
class ViewController: UIViewController , UITableViewDelegate , UITableViewDataSource , delegatCell {
#IBOutlet weak var tableView: UITableView!
var elementsArray: [data] = []
override func viewDidLoad() {
super.viewDidLoad()
for i in 1...20 {
elementsArray.append(data.init(title: "title\(i)", date: "8:00 PM", isShowMoreClicked: false, elements: ["ToDo\(i)","Aqraa\(i)","ToDo\(i)","ToDo\(i)" , "Mobile Team\(i)" , "Testing Data\(i)"]))
// Do any additional setup after loading the view, typically from a nib.
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return elementsArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let obj = elementsArray[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! expandedTableViewCell
cell.initializeCell()
print(obj.elements)
cell.data = obj.elements
cell.delegate = self
cell.dateLabel.text = obj.date
cell.titleLabel.text = obj.title
cell.showMore.titleLabel?.font = reqularDynamicFont()
cell.showMore.titleLabel?.adjustsFontSizeToFitWidth = true
cell.showMore.tag = indexPath.row
cell.isShowMoreClicked = obj.isShowMoreClicked
cell.tableView.reloadData()
self.view.layoutIfNeeded()
return cell
}
func reqularDynamicFont()-> UIFont{
let font = UIFont.systemFont(ofSize: 15, weight: .regular)
let fontMetrics = UIFontMetrics(forTextStyle: .caption1)
return fontMetrics.scaledFont(for: font)
}
func reloadTableView(indexpath: IndexPath , isShowMoreClicked: Bool) {
elementsArray[indexpath.row].isShowMoreClicked = isShowMoreClicked
tableView.reloadRows(at: [indexpath], with: .automatic)
}
}
ExpandedTableViewCell with inner table view Code :
import UIKit
protocol delegatCell {
func reloadTableView(indexpath: IndexPath , isShowMoreClicked: Bool)
}
class expandedTableViewCell: UITableViewCell , UITableViewDelegate , UITableViewDataSource{
#IBOutlet weak var dateLabel: UILabel!
#IBOutlet weak var titleLabel: UILabel!
#IBOutlet weak var tableView: UITableView!
#IBOutlet weak var showMore: UIButton!
var data : [String] = []
var initalNum = 2
var isShowMoreClicked: Bool = false
var delegate:delegatCell?
func initializeCell(){
data.removeAll()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isShowMoreClicked{
return data.count
}else{
return initalNum
}
}
#IBAction func reloadData(_ sender: UIButton) {
delegate?.reloadTableView(indexpath: IndexPath(row: sender.tag, section: 0), isShowMoreClicked: !isShowMoreClicked)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
print(data)
let cell = tableView.dequeueReusableCell(withIdentifier: "simpleTableViewCell", for: indexPath) as! simpleTableViewCell
cell.descLabel.text = data[indexPath.row]
return cell
}
}
I used auto layout to support dynamic height.