如何在iOS中将UITextView的最大高度提高到10000以上？

import UIKit

class ViewController: UIViewController, UITextViewDelegate {
    
    @IBOutlet weak var textView: UITextView!
    @IBOutlet weak var textViewHeightConstraint: NSLayoutConstraint!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        textView.delegate = self
        textView.isScrollEnabled = false
        textView.textContainerInset = UIEdgeInsets.zero
        textView.textContainer.lineFragmentPadding = 0
    }
    
    func textViewDidChange(_ textView: UITextView) {
        let maxHeight: CGFloat = 10000
        let fixedWidth = textView.frame.size.width
        let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: maxHeight))
        
        if newSize.height <= maxHeight {
            textViewHeightConstraint.constant = newSize.height
        } else {
            textViewHeightConstraint.constant = maxHeight
            textView.isScrollEnabled = true
        }
    }
}