键入长文本时，textview会添加与输入成比例的空白空间

Question

the empty space on the end我正在考虑文本视图文本（我正在编写的文本视图）的大小，并将其设置为我正在显示的文本视图的大小。但是如果写较长的文本，当我发布它时，它会在文本视图中显示更长的空白区域。我通过测量我正在写的textV的content.height来为我的文本视图的大小制作代码。

} else if identifier == "save" {
        print("Save button tapped")

        if textViewWrite.text == "" {
            print("text empty")
        }
        else{

            print("\(textViewWrite.contentSize.height)")



            let size: CGSize = textViewWrite.sizeThatFits(CGSize.init(width: textViewWrite.frame.size.width, height: CGFloat.greatestFiniteMagnitude))
            let insets: UIEdgeInsets = textViewWrite.textContainerInset;
            let relevantHeight = size.height - insets.top - insets.bottom;

            let text = Post(texts: "String", textHeight: relevantHeight, textWidth: textViewWrite.contentSize.width)
            PostService.create(text: self.textViewWrite.text!, height: Int(textViewWrite.contentSize.height), width: Int(view.frame.width) )
            print("\(textViewWrite.contentSize.height)")

            // 1
            let HomeViewController = segue.destination as! HomeViewController
            // 2
            HomeViewController.posts.append(text)

        }
        textViewWrite.text = ""
    }
}