ios - 如何正确地在具有内在内容大小的 View 之间进行约束？

Question

我在 UIView 和 UIButton 中有两个 UILabel(垂直方向)在一个“行”中。我需要得到这个结果:

查看初始化代码:

private lazy var contentView: UIView = {
    let view = UIView(frame: .zero)
    view.translatesAutoresizingMaskIntoConstraints = false

    return view
  }()

  private lazy var priceView: UIView = {
    let view = UIView(frame: .zero)
    view.translatesAutoresizingMaskIntoConstraints = false
    view.setContentHuggingPriority(.required, for: .horizontal)

    return view
  }()

  private lazy var priceLabel: UILabel = {
    let label = UILabel(frame: .zero)
    label.numberOfLines = 1
    label.translatesAutoresizingMaskIntoConstraints = false

    return label
  }()

  private lazy var oldPriceLabel: UILabel = {
    let label = UILabel(frame: .zero)
    label.numberOfLines = 1
    label.translatesAutoresizingMaskIntoConstraints = false

    return label
  }()

  private lazy var callButton: UIButton = {
    let button = UIButton(frame: .zero)
    button.translatesAutoresizingMaskIntoConstraints = false
    button.layer.cornerRadius = 22.0
    button.setTitleColor(.white, for: .normal)
    button.setTitle("Call", for: .normal)
    button.setContentHuggingPriority(.defaultLow, for: .horizontal)
    button.setContentCompressionResistancePriority(.required, for: .horizontal)

    return button
  }()

我使用 SnapKit 进行约束:

self.contentView.snp.makeConstraints { make in
  make.top.bottom.equalToSuperview()
  make.left.equalToSuperview().offset(16.0)
  make.right.equalToSuperview().offset(-16.0)
}
  self.priceView.snp.makeConstraints { make in
    make.centerY.left.equalToSuperview()
    make.right.equalTo(self.callButton.snp.left)

  }
  self.priceLabel.snp.makeConstraints { make in
    make.left.equalToSuperview()
    make.top.equalToSuperview()
    make.right.lessThanOrEqualToSuperview()
  }

  self.oldPriceLabel.snp.makeConstraints { make in
    make.left.bottom.equalToSuperview()
    make.top.equalTo(self.priceLabel.snp.bottom).offset(8.0)
    make.right.lessThanOrEqualToSuperview()
  })
  self.callButton.snp.makeConstraints { make in
   make.left.equalTo(self.priceView.snp.right)
    make.centerY.equalToSuperview()
    make.height.equalTo(44.0)
    make.right.equalToSuperview()

  }

我希望 priceView 缩小到 UILabel 的大小，并且 callButton 在所有可用空间上拉伸(stretch)。拥抱和压缩不起作用，我不明白为什么。

现在:

Answer 1

如果您不想使用 UIStackView，您可以轻松解决问题...

对于每个标签，更改:

make.right.lessThanOrEqualToSuperview()

到:

make.right.equalToSuperview()

这应该可以解决问题。