UIStackView和截断的Multiline UILabels

Question

我想添加几个多行标签UIStackView.

但我总是把我的标签截断.如此截图所示

但我喜欢这里显示的更多(我伪造的截图)

这是我的代码.首先,我创建父/主StackView,将其放入ScrollView(隐藏在屏幕中)

    stackView = UIStackView()
    stackView.axis = .Vertical
    stackView.distribution = .Fill
    stackView.spacing = 2
    stackView.translatesAutoresizingMaskIntoConstraints = false
    scrollView.addSubview(stackView)
    NSLayoutConstraint.activateConstraints(stackConstraints)


    let s1 = createHeaderStackView()
    stackView.insertArrangedSubview(s1, atIndex: 0)

    let lbl2 = makeLabel()
    lbl2.text = "Second One"
    stackView.insertArrangedSubview(lbl2, atIndex: 1)

    scrollView.setNeedsLayout()

而makeLabel和makeButton都只是辅助功能

func makeButton() -> UIButton {
    let btn = UIButton(type: .Custom)
    btn.backgroundColor = UIColor.lightGrayColor()
    return btn
}

func makeLabel() -> UILabel {
    let lbl = UILabel()
    lbl.font = UIFont.systemFontOfSize(18)
    lbl.setContentCompressionResistancePriority(1000, forAxis: .Vertical)
    lbl.setContentHuggingPriority(10, forAxis: .Vertical)
    lbl.preferredMaxLayoutWidth = scrollView.frame.width
    lbl.numberOfLines = 0
    lbl.textColor = UIColor.blackColor()
    lbl.backgroundColor = UIColor.redColor()
    return lbl
}

该createHeaderStackView方法是将我的StackView配置为包含所有标题内容的StackView.

func createHeaderStackView() -> UIStackView {
    let lblHeader = makeLabel()
    lblHeader.text = "UIStackView"
    lblHeader.textAlignment = .Center

    let lblInfo = makeLabel()
    lblInfo.text = "This is a long text, over several Lines. Because why not and am able to to so, unfortunaltey Stackview thinks I'm not allowed."
    lblInfo.textAlignment = .Natural
    lblInfo.layoutIfNeeded()

    let lblInfo2 = makeLabel()
    lblInfo2.text = "This is a seconds long text, over several Lines. Because why not and am able to to so, unfortunaltey Stackview thinks I'm not allowed."
    lblInfo2.textAlignment = .Natural
    lblInfo2.layoutIfNeeded()

    let btnPortal = makeButton()
    btnPortal.setTitle("My Button", forState: .Normal)
    btnPortal.addTarget(self, action: "gotoPushWebPortalAction", forControlEvents: .TouchUpInside)

    let headerStackView = UIStackView(arrangedSubviews: [lblHeader, btnPortal, lblInfo, lblInfo2])
    headerStackView.axis = .Vertical
    headerStackView.alignment = .Center
    headerStackView.distribution = .Fill
    headerStackView.spacing = 2
    headerStackView.setContentCompressionResistancePriority(1000, forAxis: .Vertical)
    headerStackView.setContentHuggingPriority(10, forAxis: .Vertical)
    headerStackView.setNeedsUpdateConstraints()
    headerStackView.setNeedsLayout()
    //headerStackView.layoutMarginsRelativeArrangement = true
    return headerStackView
}

所以简而言之:调整我的堆栈视图需要什么,所以每个堆栈视图和标签都以完整的大小显示？我试着压缩和拥抱一切,但它似乎没有用.谷歌搜索uistackview uilabel多线截断似乎也是一个死胡同

感谢任何帮助,对Flori表示感谢

Answer 1

您必须指定堆栈视图的尺寸。如果堆栈视图的尺寸不明确，标签不会“溢出”到下一行。

这段代码并不完全是您想要的输出，但您会明白：

override func viewDidLoad() {
    super.viewDidLoad()
    let stackView = UIStackView()
    stackView.axis = .Vertical
    stackView.distribution = .Fill
    stackView.translatesAutoresizingMaskIntoConstraints = false
    view.addSubview(stackView)
    let views = ["stackView" : stackView]
    let h = NSLayoutConstraint.constraintsWithVisualFormat("H:|-50-[stackView]-50-|", options: [], metrics: nil, views: views)
    let w = NSLayoutConstraint.constraintsWithVisualFormat("V:|-100-[stackView]-50-|", options: [], metrics: nil, views: views)
    view.addConstraints(h)
    view.addConstraints(w)
    let lbl = UILabel()
    lbl.preferredMaxLayoutWidth = stackView.frame.width
    lbl.numberOfLines = 0
    lbl.text = "asddf  jk;v ijdor vlb otid jkd;io dfbi djior dijt ioure f i;or dfuu;nfg ior mf;drt asddf  jk;v ijdor vlb otid jkd;io dfbi djior dijt ioure f infg ior mf;drt asddf  jk;v ijdor vlb otid jkd;io dfbi djior dijt ioure f i;or dfuu;nfg ior mf;drt "
    dispatch_async(dispatch_get_main_queue(), {
        stackView.insertArrangedSubview(lbl, atIndex: 0)
    })
}