Dynamically change cell height according to label text - swift

Question

I tried to add Q&A part for my app and that tableview cell have to expand according to text height, cell height have to change with this text. In this point I did some thing to solve problem which are numberOfline = 0 and UITableView.automaticDimension code can't solve my problem. Here my code from project :
Problem is cell height didn't change this code just write label under the questions and for longer answers under the next question. Means cell height didn't change.
let soruLabel: UILabel = {
let sorulabel = UILabel()
sorulabel.textColor = .darkGray
sorulabel.numberOfLines = 0
sorulabel.font = UIFont.boldSystemFont(ofSize: 17)
return sorulabel
}()
let cevapLabel: UILabel = {
let cevaplabel = UILabel()
cevaplabel.textColor = .black
cevaplabel.numberOfLines = 0
cevaplabel.font = UIFont(name: "HelveticaNeue", size: 18)
return cevaplabel
}()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setup()
}
func set(content: expandingTableCellForsss) {
self.soruLabel.text = content.soru
self.cevapLabel.text = content.expanded ? content.cevap : ""
}
func setup() {
backgroundColor = UIColor.init(red: 245, green: 245, blue: 245, alpha: 1)
addSubview(soruLabel)
addSubview(cevapLabel)
soruLabel.translatesAutoresizingMaskIntoConstraints = false
soruLabel.topAnchor.constraint(equalTo: topAnchor).isActive = true
soruLabel.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
soruLabel.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = false
soruLabel.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
cevapLabel.translatesAutoresizingMaskIntoConstraints = false
cevapLabel.topAnchor.constraint(equalTo: soruLabel.bottomAnchor).isActive = true
cevapLabel.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
cevapLabel.bottomAnchor.constraint(equalTo: soruLabel.bottomAnchor).isActive = false
cevapLabel.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}

Answer 1

The bottom anchor needs to be set:
cevapLabel.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true

Answer 2

Please check :
UITableViewCell auto height based on amount of UILabel text ,
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
To use dynamic cell height:
1) give a minimum row height for cell in viewDidLoad
tableView.estimatedRowHeight = 300
2) set rowHeight property of tableview as automatic in viewDidLoad
tableView.rowHeight = UITableViewAutomaticDimension
3) in storyboard select numberOfLines = 0
4) if you have provided custom height to cell in storyBoard, make sure its equal to estimated row height.