ios - UIStackView内容拥抱未在UITableViewCell中按预期方式工作

我有两个垂直StackView嵌套在水平StackView中。对于第一个:

titlesView.axis = .vertical
titlesView.distribution = .fill
titlesView.alignment = .leading

第二个是:

checkView.axis = .vertical
checkView.distribution = .fil
checkView.alignment = .center

和对于holderStackView(根)

    holderStackView.axis = .horizontal
    holderStackView.alignment = .center
    holderStackView.distribution = .fill


    holderStackView.addArrangedSubview(titlesView)
    holderStackView.addArrangedSubview(checkView)


    titlesView.setContentHuggingPriority(.defaultLow, for: .horizontal)
    checkView.setContentHuggingPriority(.defaultHigh, for: .horizontal)

我希望titlesView必须填充StackView，但checkView StackView填充holderStackView堆栈 View 。

如果我为它们的center或leading都设置对齐方式，那么它将按预期工作，并且第一个会增长。

期待:



现实:



我该如何解决这个问题？

它仅在contentView的UITableViewCell中发生，请参见下面的最小示例:

class ViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.separatorColor = UIColor(red:0.87, green:0.87, blue:0.87, alpha:1.00)
        tableView.estimatedRowHeight = 150
        tableView.backgroundColor = UIColor.clear
        tableView.rowHeight = UITableViewAutomaticDimension

        self.view.backgroundColor = UIColor(red:0.93, green:0.93, blue:0.93, alpha:1.00)
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 6
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        return MedicationHomeCell()
    }
}

class MedicationHomeCell: UITableViewCell {

    let holderStackView = UIStackView()
    let checkView = UIStackView()
    let titlesView = UIStackView()

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        layoutViews()
    }

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        layoutViews()
    }

    func layoutViews() {
        self.contentView.backgroundColor = .white

        self.contentView.addSubview(holderStackView)
        holderStackView.addArrangedSubview(titlesView)
        holderStackView.addArrangedSubview(checkView)

        titlesView.axis = .vertical
        titlesView.distribution = .fill
        titlesView.alignment = .leading

        checkView.axis = .vertical
        checkView.distribution = .fill
        checkView.alignment = .center

        holderStackView.axis = .horizontal
        holderStackView.alignment = .center
        holderStackView.distribution = .fill


        titlesView.setContentHuggingPriority(.defaultLow, for: .horizontal)
        checkView.setContentHuggingPriority(.defaultHigh, for: .horizontal)

        holderStackView.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            holderStackView.leftAnchor.constraint(equalTo: self.contentView.leftAnchor),
            holderStackView.rightAnchor.constraint(equalTo: self.contentView.rightAnchor),
            holderStackView.topAnchor.constraint(equalTo: self.contentView.topAnchor),
            holderStackView.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor)
            ])


        for index in 0..<2 {
            let label = UILabel()
            label.text = "Label \(index)"
            label.backgroundColor = .red
            titlesView.addArrangedSubview(label)
        }

        for index in 0..<2 {
            let label = UILabel()
            label.text = "Text \(index)"
            label.backgroundColor = .green
            checkView.addArrangedSubview(label)
        }
    }
}

最佳答案

UIStackViews似乎不尊重内容拥抱和阻力压缩属性。而是在每个排列的 subview 上设置这些属性。

对于嵌套堆栈 View ，您可能需要向下钻取到其非堆栈排列的 subview ，然后在此处设置属性。