ios - 无法使用 PureLayout 设置 ScrollView

Question

我在 UIViewController 子类中有以下 viewDidLoad 方法实现:

var scrollView  = UIScrollView.newAutoLayoutView()
var contentView = UIView.newAutoLayoutView()

override func viewDidLoad() {
    super.viewDidLoad()

    view.addSubview(scrollView)
    scrollView.autoPinEdgesToSuperviewEdgesWithInsets(UIEdgeInsetsZero)

    scrollView.addSubview(contentView)
    contentView.autoPinEdgesToSuperviewEdgesWithInsets(UIEdgeInsetsZero)
    contentView.autoMatchDimension(.Height, toDimension: .Height, ofView: view)
    contentView.autoMatchDimension(.Width, toDimension: .Width, ofView: view)

    contentView.addSubview(customView)
    customView.autoPinEdgeToSuperviewEdge(.Top, withInset:0)
    customView.autoPinEdgeToSuperviewEdge(.Left, withInset:15)
}

但是当我运行应用程序时，内容不会滚动。我发现很少PureLayout文档和示例，对 ScrollView 一无所知。有人可以帮我解决这个问题吗？

Answer 1

当您将自动布局与 Scrollview 一起使用时，您必须确保 contentView 中的每个 View 都固定到所有 4 个边。

您的 customView 仅固定到顶部和左侧，尝试固定到所有边并使用 autoSetDimension(.Height, toSize: 1300) 到一个大尺寸并观察它的工作:)

这是一个可以正常工作的示例代码

    // background
    view.backgroundColor = UIColor.lightGrayColor()

    // ScrollView setup
    let scrollView = UIScrollView()
    scrollView.backgroundColor = UIColor.blueColor()
    view.addSubview(scrollView)
    scrollView.autoPinEdgesToSuperviewEdges()

    let scrollContentView = UIView()
    scrollContentView.backgroundColor = UIColor.redColor()
    scrollView.addSubview(scrollContentView)
    scrollContentView.autoPinEdgesToSuperviewEdges()
    scrollContentView.autoMatchDimension(.Width, toDimension: .Width, ofView: view)

    let dummy = UIView()
    dummy.backgroundColor = UIColor.whiteColor()
    scrollContentView.addSubview(dummy)
    dummy.autoSetDimension(.Height, toSize: 1300)
    dummy.autoPinEdgesToSuperviewEdgesWithInsets(UIEdgeInsetsMake(20, 20, 20, 20))