UITextview multi-line editable text inside a UIAlertController?

Question

How to create multi-line editable UITextview text inside a UIAlertController ? UITextfield supports a single line, and we need to make a multi-line text input field in a pop-up window.

Answer 1

This is a good grade ...

 func popUpController() { let alertController = UIAlertController(title: "\n\n\n\n\n\n", message: nil, preferredStyle: UIAlertController.Style.actionSheet) let margin:CGFloat = 8.0 let rect = CGRect(x: margin, y: margin, width: alertController.view.bounds.size.width - margin * 4.0, height: 100.0) let customView = UITextView(frame: rect) customView.backgroundColor = UIColor.clear customView.font = UIFont(name: "Helvetica", size: 15) // customView.backgroundColor = UIColor.greenColor() alertController.view.addSubview(customView) let somethingAction = UIAlertAction(title: "Something", style: UIAlertAction.Style.default, handler: {(alert: UIAlertAction!) in print("something") print(customView.text) }) let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: {(alert: UIAlertAction!) in print("cancel")}) alertController.addAction(somethingAction) alertController.addAction(cancelAction) self.present(alertController, animated: true, completion:{}) } 

Answer 2

I made several approaches to Vishal's approach.

• Added UITextViewDelegate method to display the initial light gray text as a placeholder and delete it in textViewDidBeginEditing.

• Set the width of the textView frame, frame color, and background color to make it visible.

   class ViewController: UIViewController, UITextViewDelegate { ... @IBAction func showAlert(sender: AnyObject) { let alertController = UIAlertController(title: "Hello, I'm alert! \n\n\n\n\n\n\n", message: "", preferredStyle: .Alert) let rect = CGRectMake(15, 50, 240, 150.0) let textView = UITextView(frame: rect) textView.font = UIFont(name: "Helvetica", size: 15) textView.textColor = UIColor.lightGrayColor() textView.backgroundColor = UIColor.whiteColor() textView.layer.borderColor = UIColor.lightGrayColor().CGColor textView.layer.borderWidth = 1.0 textView.text = "Enter message here" textView.delegate = self alertController.view.addSubview(textView) let cancel = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil) let action = UIAlertAction(title: "Ok", style: .Default, handler: { action in let msg = (textView.textColor == UIColor.lightGrayColor()) ? "" : textView.text print(msg) }) alertController.addAction(cancel) alertController.addAction(action) self.presentViewController(alertController, animated: true, completion: {}) } func textViewDidBeginEditing(textView: UITextView) { if textView.textColor == UIColor.lightGrayColor(){ textView.text = "" textView.textColor = UIColor.darkGrayColor() } } } 

Answer 3

The following code works for multi-line UITextView in a UIAlertController written in Swift 4

  let alert = UIAlertController(title: "Enter your summary", message: "\n\n\n\n\n\n\n\n", preferredStyle: .alert) alert.view.autoresizesSubviews = true let textView = UITextView(frame: CGRect.zero) textView.translatesAutoresizingMaskIntoConstraints = false let leadConstraint = NSLayoutConstraint(item: alert.view, attribute: .leading, relatedBy: .equal, toItem: textView, attribute: .leading, multiplier: 1.0, constant: -8.0) let trailConstraint = NSLayoutConstraint(item: alert.view, attribute: .trailing, relatedBy: .equal, toItem: textView, attribute: .trailing, multiplier: 1.0, constant: 8.0) let topConstraint = NSLayoutConstraint(item: alert.view, attribute: .top, relatedBy: .equal, toItem: textView, attribute: .top, multiplier: 1.0, constant: -64.0) let bottomConstraint = NSLayoutConstraint(item: alert.view, attribute: .bottom, relatedBy: .equal, toItem: textView, attribute: .bottom, multiplier: 1.0, constant: 64.0) alert.view.addSubview(textView) NSLayoutConstraint.activate([leadConstraint, trailConstraint, topConstraint, bottomConstraint]) alert.addAction(UIAlertAction(title: "Done", style: .default, handler: { action in print("\(String(describing: textView.text))") })) present(alert, animated: true) 

Answer 4

You cannot create multiline text in a UIAlertController . To do this, you need to create your own UIAlertController .