UITextView border in swift 3

Question

Is there any way to set the active border color and inactive border color to UITextView? For example, if textview is focused to input text, then border color will be red, otherwise textview border color set to gray. Thank you.

Answer 1

One way would be to implement textViewDidBeginEditing(_:) and textViewDidEndEditing(_:) from UITextViewDelegate in your class where you want to change borderColor property:

class ViewController: UIViewController, UITextViewDelegate {

  ...

  override func viewDidLoad() {
    super.viewDidLoad()
    self.textView.delegate = self
    self.textView.layer.borderWidth = 1.0
  }

  func textViewDidBeginEditing(_ textView: UITextView) {
    textView.layer.borderColor = UIColor.redColor.cgColor
  } 

  func textViewDidEndEditing(_ textView: UITextView) {
    textView.layer.borderColor = UIColor.clearColor.cgColor
  }
}