Swift - TextView that expands and stays in center - swift

Question

I am trying to accomplish an Idea I got in my head but I got stuck..
I need a TextView that expands in both ways: widht-height.
That has a minimum and maximum width, and minimum height.
That is centered in the middle of the parent (SCROLL) view.
And that has a button send at the bottom trailing part of the view.
Here's the idea:
So if the user types in the box then it expands in both directions. But there's a maximum width for it (so it doesn't go offscreen) but the height is not limited: due to the parent scrollview.
The problem is that the textView's height doesn't expand when text is breaking into new line.
Code:
func textViewDidChange(_ textView: UITextView) {
self.adjustTextViewFrames(textView: textView)
}
func adjustTextViewFrames(textView : UITextView){
var newSize = textView.sizeThatFits(CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude))
if newSize.width > self.view.bounds.width - 20 {
newSize.width = self.view.bounds.width - (self.view.bounds.width/10)
}
messageBubbleTextViewWidthConstraint.constant = newSize.width
messageBubbleTextViewHeightConstraint.constant = newSize.height
UIView.animate(withDuration: 0.3) {
self.view.layoutIfNeeded()
}
}

Answer 1

Try This :
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// let's create our text view
let textView = UITextView()
textView.frame = CGRect(x: 0, y: 0, width: 200, height: 100)
textView.backgroundColor = .lightGray
textView.text = "Here is some default text that we want to show and it might be a couple of lines that are word wrapped"
view.addSubview(textView)
// use auto layout to set my textview frame...kinda
textView.translatesAutoresizingMaskIntoConstraints = false
[
textView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor),
textView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
textView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
textView.heightAnchor.constraint(equalToConstant: 50)
].forEach{ $0.isActive = true }
textView.font = UIFont.preferredFont(forTextStyle: .headline)
textView.delegate = self
textView.isScrollEnabled = false
textViewDidChange(textView)
}
}
extension ViewController: UITextViewDelegate {
func textViewDidChange(_ textView: UITextView) {
print(textView.text)
let size = CGSize(width: view.frame.width, height: .infinity)
let estimatedSize = textView.sizeThatFits(size)
textView.constraints.forEach { (constraint) in
if constraint.firstAttribute == .height {
constraint.constant = estimatedSize.height
}
}
}
}
Credit goes to Brian Voong from Let's Build That App here link