increase TableView height based on cells

Question

I need to increase UITableView height based on UITableViewCell content size. I'm using Custom Google Auto Complete. I have an UITextField. When I enter a letter in that UITextField it will call shouldChangeCharactersIn range delegate method.

Inside that method I will send dynamic request to Google AutoComplete API to get predictions result.

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

    if tableView.numberOfRows(inSection: 0) > 0
    {

    let newLength = (textField.text?.characters.count)! + string.characters.count - range.length
    let enteredString = (textField.text! as NSString).replacingCharacters(in: range, with:string)

    if newLength == 0 {
        tableView.isHidden = true
    }

    if newLength > 0
    {
        address.removeAll()
        self.tableView.isHidden = false

        GetMethod("https://maps.googleapis.com/maps/api/place/autocomplete/json?input=\(enteredString)&key=MYAPIKEY", completion: { (resultDict) in

            let resultArray = resultDict.object(forKey: "predictions")! as! NSArray

            print(resultArray.count)

            for temp in resultArray

            {
                 let newtemp = temp as! NSDictionary
                 let tempAdd = newtemp.value(forKey:"description") as! String
                let placeId = newtemp.value(forKey:"place_id") as! String
                var dict = [String : AnyObject]()
                dict["address"] = tempAdd as AnyObject?
                dict["latlong"] = placeId as AnyObject?
                self.address.append(dict as AnyObject)
                 print(newtemp.value(forKey:"description"))
                 print(self.address.count)
                self.tableView.reloadData()

            }

        })
      }
    return true
}

After I will store all address to Address array dynamically, I need to increase UITableView height based on that incoming address content.

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cellIdentifier = "TableViewCell"
    var cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier)
    if cell == nil
    {
    cell = UITableViewCell(style: .default, reuseIdentifier: cellIdentifier)
    }

    let addresstoDisp  = address[indexPath.row] as! NSDictionary
    let name = addresstoDisp.value(forKey: "address")
    cell?.textLabel?.numberOfLines = 0
    cell?.translatesAutoresizingMaskIntoConstraints = false

    cell?.textLabel?.lineBreakMode = NSLineBreakMode.byWordWrapping
    cell?.textLabel?.textAlignment = NSTextAlignment.center
    cell?.textLabel?.text = name as! String

    return cell!
}

UITableViewCell height is increasing perfectly. Also I need to increase tableView height.

Answer 1

Add these lines after your cells are created. Because it returns 0 height in viewDidLoad()

 var frame = tableView.frame
 frame.size.height = tableView.contentSize.height
 tableView.frame = frame

UPDATE

//After Tableviews data source values are assigned
tableView.reloadData()
tableView.layoutIfNeeded()
tableView.heightAnchor.constraint(equalToConstant: tableView.contentSize.height).isActive = true

Answer 2

The below code worked for me with UITableViewCell who has AutomaticDimension.

1. Create an outlet for tableViewHeight.

@IBOutlet weak var tableViewHeight: NSLayoutConstraint!
var tableViewHeight: CGFloat = 0  // Dynamically calcualted height of TableView.

2. For the dynamic height of the cell, I used the below code:

func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
    return tableView.estimatedRowHeight
}

3. For height of the TableView, with dynamic heights of the TableView Cells:

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    print(cell.frame.size.height, self.tableViewHeight)
    self.tableViewHeight += cell.frame.size.height
    tableViewBillsHeight.constant = self.tableViewHeight
}

Explanation:

After the TableView cell is created, we fetch the frame height of the cell that is about to Display and add the height of the cell to the main TableView.