NSTextView滚动

Question

如何使NSTextView可滚动？

问题：

将显示

• 文本视图，但不能滚动。我必须调整窗口的大小，以查看更多内容(

)。

问题：

• 如何使文本视图可滚动.

代码：

class ViewController: NSViewController {

    private let textView                = NSTextView()

    //MARK: Manage Views

    override func viewDidLoad() {
        super.viewDidLoad()

        setupTextView()
    }


    private func setupTextView() {

        textView.isEditable      = false

        view.addSubview(textView)

        textView.translatesAutoresizingMaskIntoConstraints = false

        textView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        textView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
        textView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        textView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
    }
}

Answer 1

NSTextView不滚动，将文本视图放置在NSScrollView中。类方法scrollableTextView() of NSTextView在NSScrollView中返回NSTextView。

private var textView:NSTextView?

private func setupTextView() {

    let scrollView = NSTextView.scrollableTextView()
    textView = scrollView.documentView as? NSTextView

    textView?.isEditable      = false

    view.addSubview(scrollView)

    scrollView.translatesAutoresizingMaskIntoConstraints = false

    scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
    scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
    scrollView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
    scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
}