如何调整UITextView的高度和它所在的容器的大小？

// 假设textView是一个UITextView实例，containerView是textView所在的容器视图

// 计算文本的高度
let text = textView.text ?? ""
let font = textView.font ?? UIFont.systemFont(ofSize: 17)
let textWidth = textView.frame.width - textView.textContainerInset.left - textView.textContainerInset.right
let textSize = CGSize(width: textWidth, height: CGFloat.greatestFiniteMagnitude)
let textHeight = text.boundingRect(with: textSize, options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil).height

// 调整UITextView的高度
textView.frame.size.height = textHeight

// 调整容器的大小
containerView.frame.size.height = textView.frame.origin.y + textHeight