Cannot Set Dynamic TableView Row Height - ios

Question

I'm trying to set dynamic row height in TableView. But unfortunately is not working.
The only thing is working is to set the heightForRowAt indexPath to a constant number.
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 470 //or any other number
}
If I delete this function, or try to set it to automatic the cell will not show at all. Something like this:
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableView.automaticDimension
}
I also tried to use:
self.tableView.estimatedRowHeight = UITableView.automaticDimension //Tried even with a number
self.tableView.rowHeight = UITableView.automaticDimension
But seems nothing to work besides using a constant height in heightForRowAt indexPath function. Which is not what I want, I want cell to be expanded based on content inside the cell.
I also tried to set height in heightForRowAt indexPath function to automatic but set a fixed height on constraints in the content of the cell xib file, still same (I did just to see what happens). So seems, something is wrong around this function.
Note:
My TableView and UITableViewCell are divided in a storyboard and a xib files.

Answer 1

If you want to set the dynamic tableview row height, you must use autolayout.
Please set the constraint on the UI components in the cell as shown in the image below.
I used UILabel as sample code. For UILabel, be sure to set Lines to 0.
Here is the sample code
class ViewController: UIViewController {
let stringArr = ["aaaaaaaaaaaaaaaaaa", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"]
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.estimatedRowHeight = 100
tableView.rowHeight = UITableView.automaticDimension
}
}
extension ViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return stringArr.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "TestCell", for: indexPath) as? TestCell else {
return UITableViewCell()
}
cell.label.text = stringArr[indexPath.row]
return cell
}
}
You need to register the cell in the tableview.
tableView.register(UINib(nibName: “YourCellNibName”, bundle: nil), forCellReuseIdentifier: “YourCellReuseIdentifier”)