Swift - Reorder UITableView cells - swift

Question

I do know that it's not too hard to do it in objective C , the problem is I'm learning Swift by skipping Objective C.
https://developer.apple.com/library/ios/documentation/userexperience/conceptual/tableview_iphone/ManageReorderRow/ManageReorderRow.html
However is there anything equivalent to the link above in Swift?

Answer 1

I have tried this...here is the code
In my example code there is button that starts the editing ---
Action Method of the button -->
#IBAction func editTableView (sender:UIBarButtonItem)
{
if listTableView.editing{
//listTableView.editing = false;
listTableView.setEditing(false, animated: false);
barButton.style = UIBarButtonItemStyle.Plain;
barButton.title = "Edit";
//listTableView.reloadData();
}
else{
//listTableView.editing = true;
listTableView.setEditing(true, animated: true);
barButton.title = "Done";
barButton.style = UIBarButtonItemStyle.Done;
//listTableView.reloadData();
}
}
And the related UITableView delegate methods -->
// The editing style for a row is the kind of button displayed to the left of the cell when in editing mode.
func tableView(tableView: UITableView!, editingStyleForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCellEditingStyle
{
if (false == self.editing && !indexPath){
return UITableViewCellEditingStyle.None;
}
if (self.editing && indexPath.row == countryList.count){
return UITableViewCellEditingStyle.Insert;
}
else{
return UITableViewCellEditingStyle.Delete;
}
//return UITableViewCellEditingStyle.Delete;
}
// Update the data model according to edit actions delete or insert.
func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!)
{
if editingStyle == UITableViewCellEditingStyle.Delete{
countryList.removeAtIndex(indexPath.row);
self.editTableView(barButton);
listTableView.reloadData();
}
else if editingStyle == UITableViewCellEditingStyle.Insert{
countryList.append("New Country");
}
}
// Determine whether a given row is eligible for reordering or not.
func tableView(tableView: UITableView!, canMoveRowAtIndexPath indexPath: NSIndexPath!) -> Bool
{
return true;
}
// Process the row move. This means updating the data model to correct the item indices.
func tableView(tableView: UITableView!, moveRowAtIndexPath sourceIndexPath: NSIndexPath!, toIndexPath destinationIndexPath: NSIndexPath!)
{
let item : String = countryList[sourceIndexPath.row];
countryList.removeAtIndex(sourceIndexPath.row);
countryList.insert(item, atIndex: destinationIndexPath.row)
}
You can also download full code Here

Answer 2

All the same rules apply as in Objective-C. You set the table view data source and delegate just like you would in Objective-C.
func tableView(tableView: UITableView!, canMoveRowAtIndexPath indexPath: NSIndexPath!) -> Bool {
return true // Yes, the table view can be reordered
}
func tableView(tableView: UITableView!, moveRowAtIndexPath fromIndexPath: NSIndexPath!, toIndexPath: NSIndexPath!) {
// update the item in my data source by first removing at the from index, then inserting at the to index.
let item = items[fromIndexPath.row]
items.removeAtIndex(fromIndexPath.row)
items.insert(item, atIndex: toIndexPath.row)
}
If you need finer grain control, you can also implement
func tableView(tableView: UITableView!, targetIndexPathForMoveFromRowAtIndexPath sourceIndexPath: NSIndexPath!, toProposedIndexPath proposedDestinationIndexPath: NSIndexPath!) -> NSIndexPath! {
…
}

Answer 3

Now there is a library for this reorder function: LPRTableView.

Answer 4

Converted Above Answer methods in Swift 3.0
// Determine whether a given row is eligible for reordering or not.
func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
return true
}
// Process the row move. This means updating the data model to correct the item indices.
func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
let item : Dictionary<String, Any> = arrInterval[sourceIndexPath.row]
arrInterval.remove(at: sourceIndexPath.row)
arrInterval.insert(item, at: destinationIndexPath.row)
}