Question

我有一个基本的SwiftUI组件。

struct PopupModal: View {
    var body: some View {
        Text("Hello, World!")
    }
}

struct PopupModal_Previews: PreviewProvider {
    static var previews: some View {
        PopupModal()
    }
}

我有一个UIViewController，我想实例化此组件并显示它。

    private let _popup = PopupModal()
    private lazy var _popupController = UIHostingController(rootView: _popup)

    override public func viewDidLoad() {
        // ...
        self.addChild(_popupController)
        view.addSubview(_popupController.view)
        _popupController.didMove(toParent: self)

    }

    override public func viewDidLayoutSubviews() {
        // How do I make this automatic or as a function of the size of _popup?
        let popupHeight = CGFloat(260)
        _popupController.view.frame = CGRect(x: 15, y: view.bounds.height - popupHeight - 20, width: view.bounds.width - 30, height: popupHeight)
    }

显示了PopupModal，但是我正在手动调整其高度。怎么能我是根据内容大小来确定大小的吗？

Answer 1

您可以使用

  _popupController.view.sizeToFit()

为使视图最初适合其固有内容，并在添加到Superview后使用自动布局约束按需对其进行布局。

如何调整UIHostingController的大小以包装SwiftUI View？

1 个答案: