Thx for your answer. I initialize the dataSource on the self (like often). After that I set the tracks with a setter and I reload the datas : `var tracks: [NSObject]? {         set {             datas = newValue             DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) { [weak self] in                 self!.tracksListTableView.reloadData() // to avoid the init bug...             }         }         get {             if let tracks: [NSObject] = datas as? [NSObject] {                 return tracks             }             return nil         }     }` My bad but my project has 2 years old and I don't even remember how I plug the datas to the TableView... In the inspector ? Thx.

I fill the tracks array with the setter I typed just before (with the reloadData) and then I have the NSTableViewDataSource extension to set the number of lines : func numberOfRows(in tableView: NSTableView) -> Int {         if let tracks = tracks {             print("V&G_FW___numberOfRows : ", self, tracks.count)             return tracks.count         }         return 0     } And in the NSTableViewDelegate extension I just get the tracks array for each track : func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {         if let theTracks: [ITLibMediaItem] = tracks as? [ITLibMediaItem] {             let theItem = theTracks[row]             let cellIdentifier: String = "TracksListCellID"             var text: String = ""                          switch tableColumn?.identifier.rawValue {             case TableColumnID.trackNumberTableColumnID.rawValue:                 text = String(row + 1)             case TableColumnID.titleTableColumnID.rawValue:                 text = getTrackTitle(theTrack: theItem)             case TableColumnID.artistTableColumnID.rawValue:                 text = iTunesModel.getArtistName(theITTrack: theItem)             case TableColumnID.albumTableColumnID.rawValue:                 text = iTunesModel.getAlbumTitle(theITTrack: theItem)             case TableColumnID.locationTableColumnID.rawValue:                 text = theItem.location?.path ?? ""             case TableColumnID.totalTimeTableColumnID.rawValue:                 text = getTotalTime(theTrack: theItem)             default:                 text = ""             }                          if let cell: NSTableCellView = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: cellIdentifier), owner: nil) as? NSTableCellView {                 cell.textField!.stringValue = text                 return cell             }         }                  print("V&G_FW___viewFor tableColumn : ", self, "no TitleCellID is present !")                  return nil     } So classic code. My problem is I think I need to call the reloadData each time I delete an item in the TableView at the bottom to refresh the view... Right ?

Alright, everything is OK with adding / removing programmatically but now I'd like to filter. Since each time I change something in the array used by the NSTableView, I need to reloadData() the NSTableView, I guess it is the same when I want to filter the array, right ? Thx.

Thx for your answer. Another method is also to use a NSArrayController to bind programmatically to the NSTableView, right ? With that method, is it easier ? Because from the moment I start to add/delete/filter, it becomes more complicated to reload the datas and get it like it is in the TableView, isn't it ? So I start to change my code for the binding : tracksListTableView.bind(.content, to: _arrayController, withKeyPath: "arrangedObjects", options: nil) Like that, I don't have to reload the datas each time I add a track to the TableView. I just do : _arrayController.add(theTrack) But now I have to change my code to remove the selected tracks... What is the good way ? Thx.

Ok so you never use NSArrayController, right ?

Yes. Thx.

So I switched my little app with NSTableViews to NSArray to NSArrayCollection. It is working but to get the number of items I still need to use a NSArray for the moment... I'd like to remove it and only use only the NSArrayCollection. So for the viewFor tableColumn: NSTableColumn? (for example), I need to know how many objects are added in the NSCollectionView. I create it programmatically for information, not in IB. Thx.

Also, I mean NSArrayController and not NSArrayCollection, my mistake...

Alright, it is working ! But now, how to get an item at index(n) ? In the viewFor tableColumn: NSTableColumn?, the [row] method failed : let theTracks = theArrayCollection.arrangedObjects as! [ITLibMediaItem] let theTrack = theTracks[row] >>> fail ("NSArray element failed to match the Swift Array Element type") Why ? Thx.

Well, I think it is because I used the arrayController.add method instead of arrayController.addObject like in your example... A dump like in your link in the iteration works better now. Thx.

Thx for this tip. And is it possible to add an entire array directly ? Thx.

Back ! So I have the adding / removing actions. What about filtering ? I'm using a NSArrayController now which has binding capacities. To bind it to the NSTableView, I simply do : tracksListTableView.bind(.content, to: arrayController, withKeyPath: "arrangedObjects", options: nil) Et voila ! I tried to bind the NSSearchField in the same way : searchField.bind(             .predicate,             to: self.arrayController,             withKeyPath: NSBindingName.filterPredicate.rawValue,             options: [.predicateFormat: "col CONTAINS[cd] $value"] But it fails when I start to type in the searchField : Multiline Error setting value for key path filterPredicate of object <NSArrayController: 0x6000036fc2a0>[object class: NSMutableDictionary, number of selected objects: 1] (from bound object <NSSearchField: 0x14c710d90>): [<ITLibMediaItem 0x600001013580> valueForUndefinedKey:]: this class is not key value coding-compliant for the key col. How to fix that ? Thx.

Hi, Back on this post. So I took a look on the Internet and I found some interesting sources. I found how to bind the NSSearchField : searchField.bind(.predicate, to: arrayController, withKeyPath: NSBindingName.filterPredicate.rawValue, options: [.predicateFormat: "title CONTAINS $value"]) And as U can see it works like a charm when I search in the ITMediaLibItem object title : But I'm not familiar with the notation and I didn't find all the possibilities. I notice if I had [cd] to the CONTAINS keyword, whatever the case the string is which is great : What are the other possibilities ? Thx.

Hi, A few mouths later, I just saw your answer... Thx for that ! I'm back on my project which use the ITLibrary (I'm speaking about it here) Everything works like a charm with my NSSearchField and now I'd like to add a NSMenu to have a more option to filter. I took a look to your link but I'm not sure to understand how to add the NSMenu... I have to set a NSMenu to the cell of the NSSearchfield ? Thx.

Hi, So basically, I just added a NSMenu to my NSSearchField : let theMenu = NSMenu(title: "Filters") let theMenus = ["all", "artist", "title", "album"] for theName in theMenus { let theMenuItem = NSMenuItem(title: theName, action: nil, keyEquivalent: "") theMenu.addItem(theMenuItem) theMenuItem.isEnabled = true } searchField.searchMenuTemplate = theMenu Problem : the items are disabled and I don't know how to enable it : What's wrong ? Thx.