Added dynamicMemberLookup support

Example/SwiftUIKitExample/SwiftUIwithUIKitView.swift

@@ -16,8 +16,8 @@ struct SwiftUIwithUIKitView: View {
             VStack {
                 // Use UIKit inside SwiftUI like this:
                 UIViewContainer(UIKitView(), layout: .intrinsic)
-                    .set(\.title, to: "Hello, UIKit \(integer)!")
-                    .set(\.backgroundColor, to: UIColor(named: "swiftlee_orange"))
+                    .title("Hello, UIKit \(integer)!")
+                    .backgroundColor(UIColor(named: "swiftlee_orange"))
                     .fixedSize()
                     .navigationTitle("Use UIKit in SwiftUI")
 
@@ -40,7 +40,7 @@ struct UILabelExample_Preview: PreviewProvider {
     static var previews: some View {
         UILabel() // <- This is a `UIKit` view.
             .swiftUIView(layout: .intrinsic) // <- This is a SwiftUI `View`.
-            .set(\.text, to: "Hello, UIKit!") // <- Use key paths for updates.
+            .text("Hello, UIKit!") // <- Set UIView properties as if they were SwiftUI properties
             .fixedSize() // <- Make sure the size is set
             .previewLayout(.sizeThatFits)
             .previewDisplayName("UILabel Preview Example")

Example/SwiftUIKitExample/UIKitView.swift

@@ -13,7 +13,7 @@ struct UIKitView_Previews: PreviewProvider {
     static var previews: some View {
         UIKitView()
             .swiftUIView(layout: .intrinsic)
-            .set(\.title, to: "This is a UIView")
+            .title("This is a UIView")
             .preview(displayName: "A UIKit UIView preview")
     }
 }

Sources/SwiftUIKitView/ModifiedUIViewContainer.swift

@@ -9,6 +9,7 @@ import Foundation
 import SwiftUI
 import UIKit
 
+@dynamicMemberLookup
 public struct ModifiedUIViewContainer<ChildContainer: UIViewContaining, Child, Value>: UIViewContaining where ChildContainer.Child == Child {
 
     let child: ChildContainer
@@ -35,5 +36,9 @@ public struct ModifiedUIViewContainer<ChildContainer: UIViewContaining, Child, V
             coordinator.view?.updateContentSize()
         }
     }
+
+    public subscript<Value>(dynamicMember keyPath: ReferenceWritableKeyPath<Child, Value>) -> (Value) -> ModifiedUIViewContainer<Self, Child, Value> {
+        { self.set(keyPath, to: $0) }
+    }
 }
 

Sources/SwiftUIKitView/UIViewContainer.swift

@@ -11,6 +11,7 @@ import SwiftUI
 
 /// A container for UIKit `UIView` elements. Conforms to the `UIViewRepresentable` protocol to allow conversion into SwiftUI `View`s.
 @available(iOS 13.0, *)
+@dynamicMemberLookup
 public struct UIViewContainer<Child: UIView> {
 
     let viewCreator: () -> Child
@@ -24,6 +25,10 @@ public struct UIViewContainer<Child: UIView> {
         self.viewCreator = viewCreator
         self.layout = layout
     }
+
+    public subscript<Value>(dynamicMember keyPath: ReferenceWritableKeyPath<Child, Value>) -> (Value) -> ModifiedUIViewContainer<Self, Child, Value> {
+        { self.set(keyPath, to: $0) }
+    }
 }
 
 // MARK: Preview + UIViewRepresentable