iOS UITableView move Cells in Code - ios

Question

I recently started working on a small iOS Project where I have a Game Score Leaderboard represented by a UITableView, whenever the Player gets a new Highscore the Leaderboard gets visible and his Score Entry (Including Picture, Name and Score) represented by a UITableViewCell is supposed to move to the new right Spot in the TableView Leaderboard it now belongs to. The calculation of the new index is working fine but the cell is not moving at all.
Some info:
The Leaderboard is populated succesful,
I set the func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool to true
Also implemented the func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath)
correctly.
I am thinking that maybe I am missing something but the problem could also lie somewhere else, I don't know and would really appreciate some help.
Delegate Mehods for Editing
func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
return true
}
// Handles reordering of Cells
func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
let player = players[sourceIndexPath.row]
players.remove(at: sourceIndexPath.row)
players.insert(player, at: destinationIndexPath.row)
}
Code where I try to move Row
func newHighscore(highscore: Int) {
friendsTableView.reloadData()
let myNewIndex = Player.recalculateMyIndex(players: players, score: highscore)
friendsTableView.moveRow(at: [0,Player.myIndex], to: [0,myNewIndex])
}

Answer 1

This code works, but it only example. adapt it for you. create new file and put this code in it, build it and check.
class ViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var scores = ["1", "2", "3", "4", "5"]
override func viewDidLoad() {
super.viewDidLoad()
}
func move(from: IndexPath, to: IndexPath) {
UIView.animate(withDuration: 1, animations: {
self.tableView.moveRow(at: from, to: to)
}) { (true) in
// write here code to remove score from array at position "at" and insert at position "to" and after reloadData()
}
}
#IBAction func buttonPressed(_ sender: UIButton) {
let fromIndexPath = IndexPath(row: 4, section: 0)
let toIndexPath = IndexPath(row: 1, section: 0)
move(from: fromIndexPath, to: toIndexPath)
}
}
extension ViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return scores.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as? TableViewCell
if let cell = cell {
cell.setText(text: scores[indexPath.row])
}
return cell ?? UITableViewCell()
}
func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
return true
}
}
For correctly use, you need to insert new element in array at last, reload data and after you can call method move() and put in it current indexPath and indexPath to insert you need.

Answer 2

Try this code for move row Up/Down
var longPress = UILongPressGestureRecognizer (target: self, action:#selector(self.longPressGestureRecognized(_:)))
ToDoTableView.addGestureRecognizer(longPress)
//MARK: -longPressGestureRecognized
func longPressGestureRecognized(_ gestureRecognizer: UIGestureRecognizer) {
let longPress = gestureRecognizer as! UILongPressGestureRecognizer
let state = longPress.state
let locationInView = longPress.location(in: ToDoTableView)
let indexPath = ToDoTableView.indexPathForRow(at: locationInView)
struct Path {
static var initialIndexPath : IndexPath? = nil
}
switch state {
case UIGestureRecognizerState.began:
if indexPath != nil {
let cell = ToDoTableView.cellForRow(at: indexPath!) as UITableViewCell!
UIView.animate(withDuration: 0.25, animations: { () -> Void in
cell?.alpha = 0.0
}, completion: { (finished) -> Void in
if finished {
UIView.animate(withDuration: 0.25, animations: { () -> Void in
cell?.alpha = 1
})
} else {
cell?.isHidden = true
}
})
}
case UIGestureRecognizerState.changed:
if ((indexPath != nil) && (indexPath != Path.initialIndexPath)) {
itemsArray.insert(itemsArray.remove(at: Path.initialIndexPath!.row), at: indexPath!.row)
ToDoTableView.moveRow(at: Path.initialIndexPath!, to: indexPath!)
Path.initialIndexPath = indexPath
}
default:
print("default:")
}
}