Question

我有一个UIStackView。

我已经添加了一些视图。

最后一个视图应位于屏幕底部。为此，我添加了一个用作间隔的视图，并在第一个和最后一个视图上设置了高度，以使中间视图延伸以填充空间。

这有效。

    let topView = UIView(frame: .zero)
        topView.withSize(.init(width: 0, height: 100))
        topView.backgroundColor = .lightGray

        let spacerView = UIView(frame: .zero)
        spacerView.backgroundColor = .darkGray

        let bottomView = UIView(frame: .zero)
        bottomView.withSize(.init(width: 0, height: 200))
        bottomView.backgroundColor = .lightGray

        let stackView = UIStackView()
        stackView.axis = .vertical
        stackView.alignment = .fill
        stackView.spacing = 0
        stackView.distribution = .fill

        addSubview(stackView)

        stackView.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            stackView.leadingAnchor.constraint(equalTo: leadingAnchor),
            stackView.trailingAnchor.constraint(equalTo: trailingAnchor),
            stackView.topAnchor.constraint(equalTo: topAnchor),
            stackView.bottomAnchor.constraint(equalTo: bottomAnchor),
        ])

        [topView, spacerView, bottomView].forEach { stackView.addArrangedSubview($0) }

但是我有一个场景，其中屏幕尺寸可能小于视图的尺寸。

我试图将UIStackView嵌入到UIScrollView中，但是当我这样做时，间隔视图不再伸展。好像现在的高度为零。（我增加了间距以显示顶视图和底视图）


        let topView = UIView(frame: .zero)
        topView.withSize(.init(width: 0, height: 100))
        topView.backgroundColor = .lightGray

        let spacerView = UIView(frame: .zero)
        spacerView.backgroundColor = .darkGray

        let bottomView = UIView(frame: .zero)
        bottomView.withSize(.init(width: 0, height: 200))
        bottomView.backgroundColor = .lightGray


        let scrollView = UIScrollView(frame: .zero)
        addSubviews(scrollView)

        NSLayoutConstraint.activate([
            scrollView.leadingAnchor.constraint(equalTo: leadingAnchor),
            scrollView.trailingAnchor.constraint(equalTo: trailingAnchor),
            scrollView.topAnchor.constraint(equalTo: topAnchor),
            scrollView.bottomAnchor.constraint(equalTo: bottomAnchor)
        ])

        let stackView = UIStackView()
        stackView.axis = .vertical
        stackView.alignment = .fill
        stackView.spacing = 8
        stackView.distribution = .fill
        scrollView.addSubview(stackView)

        stackView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            // Attaching the content's edges to the scroll view's edges
            stackView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor),
            stackView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor),
            stackView.topAnchor.constraint(equalTo: scrollView.topAnchor),
            stackView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),

            // Satisfying size constraints
            stackView.widthAnchor.constraint(equalTo: scrollView.widthAnchor)
        ])

        [topView, spacerView, bottomView].forEach { stackView.addArrangedSubview($0) }

在这种情况下，我希望UIStackView仍会填充视图，并且只有在子视图导致其高度超出视图的可见范围时才可以滚动。

Answer 1

使用带有UICollectionView作为页脚的UITableView。

您可以在此处找到教程： https://ashfurrow.com/blog/putting-a-uicollectionview-in-a-uitableviewcell-in-swift/

这是用于添加collectionView作为页眉，但对页脚的作用相同。

private let tableView: UITableView = {
    let view = UITableView(frame: .zero, style: .plain)
    view.translatesAutoresizingMaskIntoConstraints = false
    view.estimatedRowHeight = 44
    view.rowHeight = UITableView.automaticDimension
    view.keyboardDismissMode = .interactive
    view.tableFooterView = //Your Custom View with CollectionView here
    return view
}()

UIScrollView中的嵌套UIStackView子级无法拉伸填充

1 个答案: