feat: add stopReactNative method

Author: Nazar Sydiaha

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.

ios/ReactNativeBrownfield.swift

@@ -32,6 +32,13 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
   private var onBundleLoaded: (() -> Void)?
   private var delegate = ReactNativeBrownfieldDelegate()
 
+  private func checkFactoryInitialized(launchOptions: [AnyHashable: Any]? = nil) {
+    if reactNativeFactory == nil {
+      delegate.dependencyProvider = RCTAppDependencyProvider()
+      self.reactNativeFactory = RCTReactNativeFactory(delegate: delegate)
+    }
+  }
+  
   /**
    * Path to JavaScript root.
    * Default value: "index"
@@ -71,10 +78,12 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
   private var reactNativeFactory: RCTReactNativeFactory? = nil
   /**
    * Root view factory used to create React Native views.
+   * Always proxies the currently active React Native factory so restarting
+   * React Native yields a fresh root view factory instance.
    */
-  lazy private var rootViewFactory: RCTRootViewFactory? = {
-    return reactNativeFactory?.rootViewFactory
-  }()
+  private var rootViewFactory: RCTRootViewFactory? {
+    reactNativeFactory?.rootViewFactory
+  }
 
   /**
    * Starts React Native with default parameters.
@@ -88,7 +97,9 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
     initialProps: [AnyHashable: Any]?,
     launchOptions: [AnyHashable: Any]? = nil
   ) -> UIView? {
-    rootViewFactory?.view(
+      checkFactoryInitialized(launchOptions: launchOptions)
+      
+      return rootViewFactory?.view(
       withModuleName: moduleName,
       initialProperties: initialProps,
       launchOptions: launchOptions
@@ -112,9 +123,7 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
    */
   @objc public func startReactNative(onBundleLoaded: (() -> Void)?, launchOptions: [AnyHashable: Any]?) {
     guard reactNativeFactory == nil else { return }
-    
-    delegate.dependencyProvider = RCTAppDependencyProvider()
-    self.reactNativeFactory = RCTReactNativeFactory(delegate: delegate)
+      checkFactoryInitialized(launchOptions: launchOptions)
 
     if let onBundleLoaded {
       self.onBundleLoaded = onBundleLoaded
@@ -136,6 +145,25 @@ class ReactNativeBrownfieldDelegate: RCTDefaultReactNativeFactoryDelegate {
     }
   }
 
+  /**
+   * 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 { return }
+
+    factory.bridge?.invalidate()
+
+    NotificationCenter.default.removeObserver(self)
+    onBundleLoaded = nil
+
+    reactNativeFactory = nil
+  }
+  
   @objc private func jsLoaded(_ notification: Notification) {
     onBundleLoaded?()
     onBundleLoaded = nil