feat: add method to deallocate reactNativeFactory instance for iOS

docs/OBJECTIVE_C.md

@@ -70,6 +70,16 @@ Examples:
 }, launchOptions];
 ```
 
+`stopReactNative`
+
+Stops React Native and releases the underlying runtime. Safe to call multiple times. Call it after all React Native views are dismissed.
+
+Examples:
+
+```objc
+[[ReactNativeBrownfield shared] stopReactNative];
+```
+
 `view`
 
 Creates a React Native view for the specified module name.

docs/SWIFT.md

@@ -70,6 +70,16 @@ ReactNativeBrownfield.shared.startReactNative(onBundleLoaded: {
 }, launchOptions: launchOptions)
 ```
 
+`stopReactNative`
+
+Stops React Native and releases the underlying runtime. Safe to call multiple times. Call it after all React Native views are dismissed.
+
+Examples:
+
+```swift
+ReactNativeBrownfield.shared.stopReactNative()
+```
+
 `view`
 
 Creates a React Native view for the specified module name.

example/swift/App.swift

@@ -24,11 +24,19 @@ struct ContentView: View {
           .font(.title)
           .bold()
           .padding()
+          .multilineTextAlignment(.center)
 
         NavigationLink("Push React Native Screen") {
           ReactNativeView(moduleName: "ReactNative")
             .navigationBarHidden(true)
         }
+
+        Button("Stop React Native") {
+          ReactNativeBrownfield.shared.stopReactNative()
+        }
+        .buttonStyle(PlainButtonStyle())
+        .padding(.top)
+        .foregroundColor(.red)
       }
     }
   }

ios/ReactNativeBrownfield.swift

@@ -69,12 +69,18 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
    * Default value: nil
    */
   private var reactNativeFactory: RCTReactNativeFactory? = nil
-  /**
-   * Root view factory used to create React Native views.
-   */
-  lazy private var rootViewFactory: RCTRootViewFactory? = {
-    return reactNativeFactory?.rootViewFactory
-  }()
+  private var hasStartedReactNative = false
+
+  private var factory: RCTReactNativeFactory {
+    if let existingFactory = reactNativeFactory {
+      return existingFactory
+    }
+
+    delegate.dependencyProvider = RCTAppDependencyProvider()
+    let createdFactory = RCTReactNativeFactory(delegate: delegate)
+    reactNativeFactory = createdFactory
+    return createdFactory
+  }
 
   /**
    * Starts React Native with default parameters.
@@ -88,7 +94,11 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
     initialProps: [AnyHashable: Any]?,
     launchOptions: [AnyHashable: Any]? = nil
   ) -> UIView? {
-    reactNativeFactory?.rootViewFactory.view(
+    let resolvedFactory = factory
+
+    let rootViewFactory = resolvedFactory.rootViewFactory
+
+    return rootViewFactory.view(
       withModuleName: moduleName,
       initialProperties: initialProps,
       launchOptions: launchOptions
@@ -111,29 +121,54 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
    * @param launchOptions Launch options, typically passed from AppDelegate.
    */
   @objc public func startReactNative(onBundleLoaded: (() -> Void)?, launchOptions: [AnyHashable: Any]?) {
-    guard reactNativeFactory == nil else { return }
-
-    delegate.dependencyProvider = RCTAppDependencyProvider()
-    self.reactNativeFactory = RCTReactNativeFactory(delegate: delegate)
+    guard !hasStartedReactNative else { return }
+    _ = launchOptions
+    _ = factory
 
     if let onBundleLoaded {
       self.onBundleLoaded = onBundleLoaded
-      if RCTIsNewArchEnabled() {
-        NotificationCenter.default.addObserver(
-          self,
-          selector: #selector(jsLoaded),
-          name: NSNotification.Name("RCTInstanceDidLoadBundle"),
-          object: nil
-        )
-      } else {
-        NotificationCenter.default.addObserver(
-          self,
-          selector: #selector(jsLoaded),
-          name: NSNotification.Name("RCTJavaScriptDidLoadNotification"),
-          object: nil
-        )
+      let notificationName: Notification.Name = RCTIsNewArchEnabled()
+        ? Notification.Name("RCTInstanceDidLoadBundle")
+        : Notification.Name("RCTJavaScriptDidLoadNotification")
+
+      NotificationCenter.default.addObserver(
+        self,
+        selector: #selector(jsLoaded),
+        name: notificationName,
+        object: nil
+      )
+
+      if let bridge = reactNativeFactory?.bridge, !bridge.isLoading {
+        DispatchQueue.main.async { [weak self] in
+          self?.jsLoaded(Notification(name: notificationName))
+        }
       }
     }
+
+    hasStartedReactNative = true
+  }
+
+  /**
+   * Stops React Native and releases the underlying factory instance.
+   */
+  @objc public func stopReactNative() {
+    if !Thread.isMainThread {
+      DispatchQueue.main.async { [weak self] in self?.stopReactNative() }
+      return
+    }
+
+    guard let factory = reactNativeFactory else {
+      hasStartedReactNative = false
+      return
+    }
+
+    factory.bridge?.invalidate()
+
+    NotificationCenter.default.removeObserver(self)
+    onBundleLoaded = nil
+
+    hasStartedReactNative = false
+    reactNativeFactory = nil
   }
 
   @objc private func jsLoaded(_ notification: Notification) {