This can be done, please see below for a very simple (and rough - rotation does not work properly!) example, which allows you to update the size of the table view by entering a number in the text field and resetting with a button.
import UIKit
class ViewController: UIViewController {
var tableViewController : FlexibleTableViewController!
var textView : UITextView!
var button : UIButton!
var count : Int! {
didSet {
self.refreshDataSource()
}
}
var dataSource : [Int]!
let rowHeight : CGFloat = 50
override func viewDidLoad() {
super.viewDidLoad()
// Configure
self.tableViewController = FlexibleTableViewController(style: UITableViewStyle.plain)
self.count = 10
self.tableViewController.tableView.backgroundColor = UIColor.red
self.textView = UITextView()
self.textView.textAlignment = NSTextAlignment.center
self.textView.textColor = UIColor.white
self.textView.backgroundColor = UIColor.blue
self.button = UIButton()
self.button.setTitle("Reset", for: UIControlState.normal)
self.button.setTitleColor(UIColor.white, for: UIControlState.normal)
self.button.backgroundColor = UIColor.red
self.button.addTarget(self, action: #selector(self.updateTable), for: UIControlEvents.touchUpInside)
self.layoutFrames()
// Assemble
self.view.addSubview(self.tableViewController.tableView)
self.view.addSubview(self.textView)
self.view.addSubview(self.button)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func refreshDataSource() -> Void {
if let _ = self.dataSource {
if !self.dataSource.isEmpty {
self.dataSource.removeAll()
}
}
else
{
self.dataSource = [Int]()
}
for count in 0..<self.count {
self.dataSource.append(count)
}
self.tableViewController.dataSource = self.dataSource
self.tableViewController.tableView.reloadData()
if let _ = self.view {
self.layoutFrames()
self.view.setNeedsDisplay()
}
}
func updateTable() -> Void {
guard let _ = self.textView.text else { return }
guard let validNumber = Int(self.textView.text!) else { return }
self.count = validNumber
}
func layoutFrames() -> Void {
if self.tableViewController.tableView != nil {
self.tableViewController.tableView.frame = CGRect(origin: CGPoint(x: self.view.frame.width / 2 - 100, y: 100), size: CGSize(width: 200, height: CGFloat(self.dataSource.count) * self.rowHeight))
NSLog("\(self.tableViewController.tableView.frame)")
}
if self.textView != nil {
self.textView.frame = CGRect(origin: CGPoint(x: 50, y: 100), size: CGSize(width: 100, height: 100))
}
if self.button != nil {
self.button.frame = CGRect(origin: CGPoint(x: 50, y: 150), size: CGSize(width: 100, height: 100))
}
}
}
class FlexibleTableViewController : UITableViewController {
var dataSource : [Int]!
override init(style: UITableViewStyle) {
super.init(style: style)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.dataSource.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") ?? UITableViewCell()
cell.frame = CGRect(origin: CGPoint(x: 10, y: 5), size: CGSize(width: 180, height : 40))
cell.backgroundColor = UIColor.green
return cell
}
}
Whether it is a good idea or not, is, as has been pointed out, another question! Hope that helps!
