Example of calling swift code from RN

ios/Native/Application/Views/BaseButton/BaseButton.swift

@@ -0,0 +1,18 @@
+//
+//  BaseButton.swift
+//  RNPlayground
+//
+//  Created by Artur Gurgul on 02/08/2025.
+//
+
+import SwiftUI
+
+struct BaseButton: View {
+  @EnvironmentObject var sharedState: SharedState
+  
+  var body: some View {
+    Button("SwiftUI Button") {
+      sharedState.message = "Clicked in SwiftUI button that was created in RN"
+    }
+  }
+}

ios/Native/Application/Views/BaseButton/BaseButtonManager.m

@@ -0,0 +1,12 @@
+//
+//  BaseButtonManager.m
+//  RNPlayground
+//
+//  Created by Artur Gurgul on 02/08/2025.
+//
+
+#import <React/RCTViewManager.h>
+
+@interface RCT_EXTERN_MODULE(BaseButtonManager, RCTViewManager)
+
+@end

ios/Native/Application/Views/BaseButton/BaseButtonManager.swift

@@ -0,0 +1,23 @@
+//
+//  BaseButtonManager.swift
+//  RNPlayground
+//
+//  Created by Artur Gurgul on 02/08/2025.
+//
+
+import Foundation
+import React
+import SwiftUI
+
+@objc(BaseButtonManager)
+class BaseButtonManager: RCTViewManager {
+    override func view() -> UIView! {
+      return UIHostingController(
+        rootView: BaseButton()
+      ).view
+    }
+
+    override static func requiresMainQueueSetup() -> Bool {
+        return true
+    }
+}

ios/Native/Application/Views/CustomButton/CustomButton.swift

@@ -0,0 +1,60 @@
+//
+//  CustomButton.swift
+//  RNPlayground
+//
+//  Created by Artur Gurgul on 02/08/2025.
+//
+
+import UIKit
+import SwiftUI
+
+
+@objc(CustomButton)
+class CustomButton: UIView {
+
+    private let label: UILabel = {
+        let lbl = UILabel()
+        lbl.text = "Hello from native"
+        lbl.textColor = .white
+        lbl.translatesAutoresizingMaskIntoConstraints = false
+        return lbl
+    }()
+
+    private let button: UIButton = {
+        let btn = UIButton(type: .system)
+        btn.setTitle("Click Me", for: .normal)
+        btn.setTitleColor(.white, for: .normal)
+        btn.translatesAutoresizingMaskIntoConstraints = false
+        return btn
+    }()
+
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        self.backgroundColor = .systemBlue
+
+        self.addSubview(label)
+        self.addSubview(button)
+
+        setupConstraints()
+        button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
+    }
+
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    private func setupConstraints() {
+        NSLayoutConstraint.activate([
+            label.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 16),
+            label.centerYAnchor.constraint(equalTo: self.centerYAnchor),
+
+            button.leadingAnchor.constraint(equalTo: label.trailingAnchor, constant: 12),
+            button.centerYAnchor.constraint(equalTo: self.centerYAnchor),
+            button.trailingAnchor.constraint(lessThanOrEqualTo: self.trailingAnchor, constant: -16)
+        ])
+    }
+
+    @objc private func buttonTapped() {
+        
+    }
+}

ios/Native/Application/Views/CustomButton/CustomButtonManager.m

@@ -0,0 +1,12 @@
+//
+//  CustomButtonManager.m
+//  RNPlayground
+//
+//  Created by Artur Gurgul on 02/08/2025.
+//
+
+#import <React/RCTViewManager.h>
+
+@interface RCT_EXTERN_MODULE(CustomButtonManager, RCTViewManager)
+
+@end

ios/Native/Application/Views/CustomButton/CustomButtonManager.swift

@@ -0,0 +1,20 @@
+//
+//  ViewManager.swift
+//  RNPlayground
+//
+//  Created by Artur Gurgul on 02/08/2025.
+//
+
+import Foundation
+import React
+
+@objc(CustomButtonManager)
+class CustomButtonManager: RCTViewManager {
+    override func view() -> UIView! {
+        return CustomButton()
+    }
+
+    override static func requiresMainQueueSetup() -> Bool {
+        return true
+    }
+}

ios/Native/Application/Views/ToolboxHeader.swift

@@ -18,7 +18,7 @@ struct ToolboxHeader: View {
           sharedState.send(message: "hello from Swift!")
         }
       }
-      Text("SwiftUI => RN => SwiftUI: \(sharedState.text1)")
+      Text("Message: \(sharedState.message)")
     }
   }
 }