Add UITextViewDelegate to your class and then set your delegate for your textView or your textField in viewDidLoad. Should look something like this:
myTextField// in viewDidLoad textField.delegate = self textView.delegate = self Swift 3
// hides text views func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool { if (text == "\n") { textView.resignFirstResponder() return false } return true } // hides text fields func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { if (string == "\n") { textField.resignFirstResponder() return false } return true } Swift 2.0
The below syntax has been tested for Swift 1.2 & Swift 2.0
func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool { if(text == "\n") { textView.resignFirstResponder() return false } return true } Note: at one point this answer was unique from the accepted answer
