I want to create autocomplete list like this for `NSTextField`:
[![enter image description here](https://i.stack.imgur.com/nh5Tu.png)](https://i.stack.imgur.com/nh5Tu.png)

I have found this:
<https://developer.apple.com/documentation/appkit/nscontroltexteditingdelegate/1428925-control>

```
optional func control(_ control: NSControl, 
             textView: NSTextView, 
          completions words: [String], 
  forPartialWordRange charRange: NSRange, 
  indexOfSelectedItem index: UnsafeMutablePointer<Int>) -> [String]

```

Can somebody please explain how to use this on any example? 
I can't really understand.

I tried to implement this, but nothing works. You can find my code below.

Thank you in advance

My code:
--------

```
class ViewController: NSViewController, NSTextFieldDelegate {

@IBOutlet weak var InputField: NSTextField!

override func viewDidLoad() {
    super.viewDidLoad()

    InputField.delegate = self
}

func control(_ control: NSControl, textView: NSTextField, completions words: [String], forPartialWordRange charRange: NSRange, indexOfSelectedItem index: UnsafeMutablePointer<Int>) -> [String] {

    let words = ["Hello", "Brother"]

    return words
}

@IBAction func CompleteButton(_ sender: NSButton) {
    print("pressed")
    InputField.complete(nil)

```

}
 }

But if I try to press the button, I get this error in my console:

```
pressed
[NSTextField complete:]: unrecognized selector sent to instance 0x10066ae00
[General] -[NSTextField complete:]: unrecognized selector sent to instance 0x10066ae00

```