fix(@capacitor/haptics): prevent thread overload by reusing CHHapticEngine

haptics/ios/Sources/HapticsPlugin/Haptics.swift

@@ -6,6 +6,45 @@ import CoreHaptics
 
     var selectionFeedbackGenerator: UISelectionFeedbackGenerator?
 
+    // Haptic Engine Management
+    private var hapticEngine: CHHapticEngine?
+    private var idleTimer: Timer?
+    private let idleInterval: TimeInterval = 5.0 // Engine will shut down after 5 seconds of inactivity
+
+    /**
+    * Initializes the haptic engine and starts it.
+    */
+    private func initializeEngine() {
+        if CHHapticEngine.capabilitiesForHardware().supportsHaptics {
+            do {
+                hapticEngine = try CHHapticEngine()
+                try hapticEngine?.start()
+            } catch {
+                print("Error initializing haptic engine: \(error)")
+                hapticEngine = nil
+            }
+        }
+    }
+
+    /**
+    * Reset the idle timer each time a haptic event is fired.
+    */
+    private func resetIdleTimer() {
+        idleTimer?.invalidate()
+        idleTimer = Timer.scheduledTimer(withTimeInterval: idleInterval, repeats: false) { [weak self] _ in
+            self?.shutdownEngine()
+        }
+    }
+
+    /**
+    * Shuts down the haptic engine if it is not in use.
+    */
+    private func shutdownEngine() {
+        hapticEngine?.stop(completionHandler: nil)
+        hapticEngine = nil
+    }
+
+
     @objc public func impact(_ impactStyle: UIImpactFeedbackGenerator.FeedbackStyle) {
         let generator = UIImpactFeedbackGenerator(style: impactStyle)
         generator.impactOccurred()
@@ -38,16 +77,19 @@ import CoreHaptics
 
     @objc public func vibrate(_ duration: Double) {
         if CHHapticEngine.capabilitiesForHardware().supportsHaptics {
+            // Reuse the existing engine or initialize a new one if needed.
+            if hapticEngine == nil {
+                initializeEngine()
+            }
+            // Reset the idle timer so the engine remains alive.
+            resetIdleTimer()
+
+            guard let engine = hapticEngine else {
+                vibrate()  // fallback if the engine couldn’t be created
+                return
+            }
+
             do {
-                let engine = try CHHapticEngine()
-                try engine.start()
-                engine.resetHandler = { [] in
-                    do {
-                        try engine.start()
-                    } catch {
-                        self.vibrate()
-                    }
-                }
                 let intensity = CHHapticEventParameter(parameterID: .hapticIntensity, value: 1.0)
                 let sharpness = CHHapticEventParameter(parameterID: .hapticSharpness, value: 1.0)