由视图代码创建的TableView不会滚动到内容结尾

Question

我正在尝试创建一个具有水平stackView的视图，该视图的第一行有2个按钮，第二行有一个表。这个桌子会增加它的高度，而我的问题是，当桌子的高度太高时，按钮会移到顶部屏幕的外部，而我无法将桌子滚动到底部。如何正确设置约束以使此行为发生？当工作台高度过高时，应仅创建滚动条，而不移动其他组件。你们能帮我吗？

在这里我更新桌子的高度。

   func updateTableHeight() {
        UIView.animate(withDuration: 0, animations: {
            self.tableView.layoutIfNeeded()
        }) { (complete) in
            self.heightOfTableViewConstraint?.constant = self.tableView.contentSize.height
        }
    } 

我在这里设置所有约束：

private func setUpViewConstraints() {
        tableView.translatesAutoresizingMaskIntoConstraints = false
        goToNextPageButton.translatesAutoresizingMaskIntoConstraints = false
        goToPreviousPageButton.translatesAutoresizingMaskIntoConstraints = false
        buttonsStackView.translatesAutoresizingMaskIntoConstraints = false
        mainStackView.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .black
        let viewsDictionary: [String: Any] = ["tableView": tableView,
                                              "goToNextPageButton": goToNextPageButton,
                                              "goToPreviousPageButton": goToPreviousPageButton,
                                              "mainStackView": mainStackView,
                                              "buttonsStackView": buttonsStackView]

        let mainStackViewHorizontalConstraints =
            NSLayoutConstraint.constraints(withVisualFormat: "H:|-40-[mainStackView]-40-|",
                                           options: NSLayoutFormatOptions(rawValue: 0),
                                           metrics: nil, views: viewsDictionary)
        let mainStackViewVerticalConstraints =
            NSLayoutConstraint.constraints(withVisualFormat: "V:[mainStackView]",
                                           options: NSLayoutFormatOptions(rawValue: 0),
                                           metrics: nil, views: viewsDictionary)

        let buttonsStackViewVerticalConstraints =
            NSLayoutConstraint.constraints(withVisualFormat: "V:|-20-[buttonsStackView]",
                                           options: NSLayoutFormatOptions(rawValue: 0),
                                           metrics: nil, views: viewsDictionary)

        let buttonsStackViewHorizontalConstraints =
            NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[buttonsStackView]-0-|",
                                           options: NSLayoutFormatOptions(rawValue: 0),
                                           metrics: nil, views: viewsDictionary)

        let tableViewViewHorizontalConstraints =
            NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[tableView]-0-|",
                                           options: NSLayoutFormatOptions(rawValue: 0),
                                           metrics: nil, views: viewsDictionary)

        buttonsStackView.addConstraint(NSLayoutConstraint(item: goToPreviousPageButton,
                                              attribute: .height,
                                              relatedBy: .equal,
                                              toItem: nil,
                                              attribute: .height,
                                              multiplier: 1,
                                              constant: 80))

        buttonsStackView.addConstraint(NSLayoutConstraint(item: goToNextPageButton,
                                              attribute: .height,
                                              relatedBy: .equal,
                                              toItem: nil,
                                              attribute: .height,
                                              multiplier: 1,
                                              constant: 80))

        view.addConstraint(NSLayoutConstraint(item: mainStackView,
                                              attribute: .top,
                                              relatedBy: .equal,
                                              toItem: view,
                                              attribute: .top,
                                              multiplier: 1,
                                              constant: 40))

        view.addConstraints(mainStackViewHorizontalConstraints)
        view.addConstraints(mainStackViewVerticalConstraints)
        view.addConstraints(buttonsStackViewHorizontalConstraints)
        view.addConstraints(buttonsStackViewVerticalConstraints)
        mainStackView.addConstraints(tableViewViewHorizontalConstraints)
    }