SwiftUI Coordinator：方法无法标记@objc

Question

在 SwiftUI 中使用 UIViewController 我需要为两个按钮分配选择器。那些需要是@objc，但我得到了错误：

无法将方法标记为@objc，因为在Objective-C中无法表示参数的类型

struct ScanPreView: UIViewControllerRepresentable {

    class Coordinator: NSObject {
        
        var parent: ScanPreView
        
        init(_ parent: ScanPreView) {
            self.parent = parent
        }
        
        @objc func dismissPreviewedScanTapped(sender: ScanPreView) {
            
        }
        
        @objc func savePreviewedSceneTapped(sender: ScanPreView) {
            
        }
    }
        
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    
    func makeUIViewController(context: Context) -> ScenePreviewViewController {
        let preview = ScenePreviewViewController(pointCloud: pointCloud, meshTexturing: meshTexturing, landmarks: nil)
        preview.leftButton.addTarget(context.coordinator, action: #selector(Coordinator.dismissPreviewedScanTapped(sender:)), for: UIControl.Event.touchUpInside)
        preview.rightButton.addTarget(context.coordinator, action: #selector(Coordinator.savePreviewedSceneTapped(sender:)), for: UIControl.Event.touchUpInside)
        return preview
    }
}

Answer 1

你不需要在那里查看，所以如果你需要动作签名，只需使用 Any，比如

@objc func dismissPreviewedScanTapped(sender: Any) {
    
}