The question asks how to do it with the return key but I think this could help someone with the intent to just make keyboard disappear when using UITextView:

@IBOutlet weak var textView: UITextView! private func addToolBarForTextView() { let textViewToolbar: UIToolbar = UIToolbar() textViewToolbar = UIBarStyle.Default textViewToolbar = [ UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Done, target: self, action: #selector(self.cancelInput)), UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: self, action: nil), UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Done, target: self, action: #selector(self.doneInput)) ] textViewToolbar() self.textView.inputAccessoryView = textViewToolbar //do it for every relevant textView if there are more than one }   func doneInput() {  self.textView.resignFirstResponder()  } func cancelInput() { self.textView.text = "" self.textView.resignFirstResponder() } 

Call addToolBarForTextView() in the viewDidLoad or some other life cycle method.

It seems that was the perfect solution for me.

Cheers,

Murat

The question asks how to do it with the return key but I think this could help someone with the intent to just make keyboard disappear when using UITextView:

private func addToolBarForTextView() {   let textViewToolbar: UIToolbar = UIToolbar()   textViewToolbar.barStyle = .default   textViewToolbar.items = [   UIBarButtonItem(title: "Cancel", style: .done,  target: self, action: #selector(cancelInput)),   UIBarButtonItem(barButtonSystemItem: .flexibleSpace,  target: self, action: nil),   UIBarButtonItem(title: "Post Reply", style: .done,  target: self, action: #selector(doneInput))   ]   textViewToolbar.sizeToFit()  yourTextView.inputAccessoryView = textViewToolbar } @objc func cancelInput() { print("cancel") } @objc func doneInput() { print("done") } override func viewDidLoad() { super.viewDidLoad()  addToolBarForTextView() } 

Call addToolBarForTextView() in the viewDidLoad or some other life cycle method.

It seems that was the perfect solution for me.

Cheers,

Murat