How to change the TextView height dynamicly to a threshold and then allow scrolling?

Question

I have a TextView that has a constraint of min height of 33. The scroll is disabled from the storyboard. The TextView should increase in height based on the content until it

Answer 1

It seems your code requires two changes, and it will work fine.

1. Instead of min height of constraint provide max height of 100:

2. Change code as below:

    import UIKit
   
   class ViewController: UIViewController, UITextViewDelegate
   {
       @IBOutlet weak var messageTextView: UITextView!
   
       let messageTextViewMaxHeight: CGFloat = 100
       override func viewDidLoad()
       {
           super.viewDidLoad()
           messageTextView.delegate = self
       }
   
       func textViewDidChange(textView: UITextView)
       {
           if textView.contentSize.height >= self.messageTextViewMaxHeight
           {
               textView.scrollEnabled = true
           }
           else
               {
               textView.frame.size.height = textView.contentSize.height
               textView.scrollEnabled = false // textView.isScrollEnabled = false for swift 4.0
           }
       }
   }