Question

我正在尝试将 Apple 的一个演示中的 ViewController 包装在 SwiftUI UIViewControllerRepresentable 中，它有一组 IBOutlets，它们连接到主故事板。我该如何处理这种情况？应该将 IBOutlets 替换为 View 结构，还是应该尝试将 Storyboard 与 SwiftUI 合并？

struct ARViewContainer: UIViewControllerRepresentable {
    
    @ObservedObject var model: Model
    
    typealias UIViewControllerType = ARView
    
    func makeUIViewController(context: Context) -> ARView {
        return ARView(model)
    }
    func updateUIViewController(_ uiViewController:
        ARViewContainer.UIViewControllerType, context:
        UIViewControllerRepresentableContext<ARViewContainer>) { }
    
}

class ARView: UIViewController, ARSCNViewDelegate {
    
    @ObservedObject var model: Model
    
    // MARK: IBOutlets
    
    @IBOutlet var sceneView: VirtualObjectARView!
    
    @IBOutlet weak var addObjectButton: UIButton!
    
    @IBOutlet weak var blurView: UIVisualEffectView!
    
    @IBOutlet weak var spinner: UIActivityIndicatorView!
    
    @IBOutlet weak var upperControlsView: UIView!

Answer 1

它绝对可以工作，但您必须从故事板实例化您的 UIViewController。现在，您只是使用 ARView() 对其进行初始化，因此它与情节提要没有连接，也无法连接出口。

基本示例：

struct ContentView : View {
    var body: some View {
        MyStoryboardVCRepresented()
    }
}

struct MyStoryboardVCRepresented : UIViewControllerRepresentable {
    func makeUIViewController(context: Context) -> MyStoryboardVC {
        UIStoryboard(name: "MyStoryboard", bundle: Bundle.main).instantiateViewController(identifier: "MyVC") as! MyStoryboardVC //theoretically unsafe to unwrap like this with `!`, but we know it works, since the view controller is included in the storyboard
    }
    
    func updateUIViewController(_ uiViewController: MyStoryboardVC, context: Context) {
        uiViewController.label.text = "Hello, world!"
    }
}

class MyStoryboardVC : UIViewController {
    @IBOutlet var label : UILabel!
}

在 UIViewControllerRepresentable 中处理 @IBOutlet

1 个答案: