我如何通过代码在方向更改时添加对UIStackView.Axis的更改?

时间:2015-09-17 12:59:06

标签: swift ios9 uistackview

我有几个UIStackView我以编程方式添加,我希望他们在应用说Axis时有另一个Regular Width and Any Height

这甚至可能,就像它在界面构建器中一样吗?

我在Google上遇到的只是willTransitionToTraitCollection,但不是我需要的。

为了更容易理解我需要的东西:

for i in numberOfItems {
    let stackView = UIStackView()
    stackView.append... // add views in this new stack view

    // here is where I need help:
    stackView.axis = horizontal
    stackView.addSomething... stackView.axis = vertical if regular width and any height.

    existingStackView.append.... stackView
}

修改

我找到了另一种方法,但是当我旋转它时,我在iPhone 6+上遇到了一些奇怪的行为。 Git回购:https://github.com/bjaskj/iOSStackViewConstraints

class MyStackView: UIStackView {
    override func traitCollectionDidChange(previousTraitCollection: UITraitCollection?) {
        super.traitCollectionDidChange(previousTraitCollection)

        if traitCollection.horizontalSizeClass == UIUserInterfaceSizeClass.Regular {
            axis = UILayoutConstraintAxis.Horizontal
        } else {
            axis = UILayoutConstraintAxis.Vertical
        }
    }
}

的ViewController:

@IBOutlet weak var mainStackView: UIStackView!

override func viewDidLoad() {
    super.viewDidLoad()
    addElement("Name", description: "Saint Petersburg")
    addElement("Native name", description: "Санкт-Петербург")
    addElement("Country", description: "Russia")
    addElement("Federal district", description: "Northwestern")
    addElement("Economic region", description: "Northwestern")
    addElement("Established", description: "May 27, 1703")
}

func addElement(title:String, description:String) {

    let labelTitle = UILabel()
    labelTitle.backgroundColor = UIColor.redColor()
    labelTitle.font = UIFont.preferredFontForTextStyle(UIFontTextStyleHeadline)
    labelTitle.text = title
    labelTitle.textColor = UIColor.whiteColor()

    let labelDescription = UILabel()
    labelDescription.backgroundColor = UIColor.blueColor()
    labelDescription.font = UIFont.preferredFontForTextStyle(UIFontTextStyleBody)
    labelDescription.text = description
    labelDescription.textColor = UIColor.whiteColor()

    let stackHolder = MyStackView()
    stackHolder.axis = .Vertical
    stackHolder.distribution = .FillEqually

    stackHolder.addArrangedSubview(labelTitle)
    stackHolder.addArrangedSubview(labelDescription)
    stackHolder.spacing = 8

    mainStackView.addArrangedSubview(stackHolder)
}

旋转iPhone 6+时会发生什么情况: enter image description here

但是如果我在旋转位置启动应用程序,我的期望和得分: enter image description here

1 个答案:

答案 0 :(得分:5)

<强>更新

好的,所以看起来你有两个问题:

1)当我将stackviews添加到场景中时,如何根据大小类添加适当的stackview.axis:

for i in numberOFItems {
    let stackView = UIStackView()

    if view.traitCollection.verticalSizeClass == .Unspecified && view.traitCollection.horizontalSizeClass == .Regular {
        stackView.axis = .Vertical
    } else {
        stackView.axis = .Horizonal
    }

    stackView.addArrangedSubview(arrayOfViews[i])
}

2)当手机方向改变时,如何使堆栈视图从水平轴变为垂直轴:

您需要拥有一组已初始化的堆栈视图。然后,您需要逐步完成委托方法中的stackviews并更改其方向。

override func traitCollectionDidChange(previousTraitCollection: UITraitCollection?) {
    var axis

    if view.traitCollection.verticalSizeClass == .Compact {
        axis = UILayoutConstraintAxis.Horizontal
    } else {
        axis = UILayoutConstraintAxis.Vertical
    }

    for stackView in stackViewArray {
        stackView.axis = axis
    }
}

视图有一个traitCollection,包括verticalSizeClass和horizo​​ntalSizeClass。它们的值可以是.Compact,.Regular和.Unspecified。

方法traitCollectionDidChange应该在修改尺寸等级时(即手机转动时)告诉您。

如果仍然无法解答您的问题,请尝试重写您的问题,以便更容易理解

另外,我没有办法知道设置这些属性一次并完成它,你必须处理这两种情况。

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