Question

我在IB中创建了一个Stackview，它有垂直方向。此stackview与父视图的宽度相等。

现在我以编程方式创建了一个Stackview，例如

let stackViewHorizontal   = UIStackView()
    stackViewHorizontal.axis  = UILayoutConstraintAxis.horizontal
    stackViewHorizontal.distribution  = UIStackViewDistribution.fillEqually
    stackViewHorizontal.alignment = UIStackViewAlignment.leading
    stackViewHorizontal.spacing = 8
    stackViewHorizontal.translatesAutoresizingMaskIntoConstraints = false
    stackViewHorizontal.leadingAnchor.constraint(equalTo: mainStackView.leadingAnchor,constant:0)
    stackViewHorizontal.trailingAnchor.constraint(equalTo: mainStackView.trailingAnchor,constant:0)

这里mainStackView是一个通过IB创建的堆栈视图。而stackviewHorizontal是以编程方式创建的堆栈视图。我在stackViewHorizontal内部的UILabels。我预计这将扩展到全长，每个UiLabel将占据屏幕宽度的50％，因为stackview具有水平轴并且分布是fillEqually。

但我水平地在彼此旁边有一个UiLabels。但没有占据整个屏幕宽度

我做错了请通知？

Answer 1

激活约束，同时给它一个高度

stackViewHorizontal.leadingAnchor.constraint(equalTo: mainStackView.leadingAnchor,constant:0).isActive = true
stackViewHorizontal.trailingAnchor.constraint(equalTo: mainStackView.trailingAnchor,constant:0).isActive = true

或

NSLayoutConstraint.activate([ stackViewHorizontal.leadingAnchor.constraint(equalTo: mainStackView.leadingAnchor,constant:0), stackViewHorizontal.trailingAnchor.constraint(equalTo: mainStackView.trailingAnchor,constant:0) ])

//

let stackViewHorizontal = UIStackView() stackViewHorizontal.axis = UILayoutConstraintAxis.horizontal stackViewHorizontal.distribution = UIStackViewDistribution.fillEqually stackViewHorizontal.alignment = UIStackViewAlignment.leading stackViewHorizontal.spacing = 8 self.view.addSuview(stackViewHorizontal) //// add it here stackViewHorizontal.translatesAutoresizingMaskIntoConstraints = false stackViewHorizontal.leadingAnchor.constraint(equalTo: mainStackView.leadingAnchor,constant:0).isActive = true stackViewHorizontal.trailingAnchor.constraint(equalTo: mainStackView.trailingAnchor,constant:0).isActive = true

Stackview里面的其他stackview宽度问题

1 个答案: