在 UIViewControllerRepresentable 中处理 @IBOutlet答案

【问题标题】：Handling @IBOutlet in UIViewControllerRepresentable在 UIViewControllerRepresentable 中处理 @IBOutlet
【发布时间】：2021-08-01 19:30:58
【问题描述】：

我正在尝试将 Apple 演示中的 ViewController 包装在 SwiftUI UIViewControllerRepresentable 中，它有一组连接到主情节提要的 IBOutlets。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!

【问题讨论】：

标签： swiftui uikit

【解决方案1】：

它绝对可以工作，但您必须从情节提要中实例化您的UIViewController。现在，你只是用ARView() 初始化它，所以它没有连接到情节提要，也没有办法连接出口。

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!
}

【讨论】：

谢谢！简明扼要