iOS Device Haptic Feedback

modules/vibration/src/main/java/com/gluonhq/attach/vibration/VibrationService.java

@@ -56,14 +56,33 @@
  */
 public interface VibrationService {
 
+
     /**
      * Returns an instance of {@link VibrationService}.
+     *
      * @return An instance of {@link VibrationService}.
      */
     static Optional<VibrationService> create() {
         return Services.get(VibrationService.class);
     }
 
+    /**
+     * Haptic Feedback Styles: Light, Medium, Heavy.
+     */
+    enum HapticFeedbackStyle {
+        LIGHT(1), MEDIUM(2), HEAVY(3);
+
+        private int style;
+
+        HapticFeedbackStyle(int style) {
+            this.style = style;
+        }
+
+        public int getStyle() {
+            return this.style;
+        }
+    }
+
     /**
      * Vibrates the device with the default pattern and duration
      */
@@ -88,11 +107,18 @@ static Optional<VibrationService> create() {
      *     <li>Wait for 2 seconds</li>
      *     <li>Vibrate for 3 seconds</li>
      * </ul>
-     *
-     * Note: the availability of this functionality is platform-restricted, and at present only Android supports it. 
+     * <p>
+     * Note: the availability of this functionality is platform-restricted, and at present only Android supports it.
      * Calling this method on iOS will result in the same vibration as calling {@link #vibrate()}
      *
      * @param pattern The pattern of durations to play the vibration for (with wait periods in between).
      */
     void vibrate(long... pattern);
+
+    /**
+     * Call Haptic Feedback.
+     *
+     * @param hapticFeedbackStyle Feedback Style {@link HapticFeedbackStyle}
+     */
+    void hapticFeedback(HapticFeedbackStyle hapticFeedbackStyle);
 }

modules/vibration/src/main/java/com/gluonhq/attach/vibration/impl/IOSVibrationService.java

@@ -35,17 +35,24 @@ public class IOSVibrationService implements VibrationService {
     static {
         System.loadLibrary("Vibration");
     }
-    
+
     @Override
     public void vibrate() {
         doVibrate();
     }
-    
+
     @Override
     public void vibrate(long... pattern) {
         // pattern not supported on iOS
-        vibrate(); 
+        vibrate();
+    }
+
+    @Override
+    public void hapticFeedback(HapticFeedbackStyle hapticFeedbackStyle) {
+        doHapticFeedback(hapticFeedbackStyle.getStyle());
     }
 
     private native static void doVibrate();
-}
+
+    private native static void doHapticFeedback(int style);
+}

modules/vibration/src/main/native/ios/Vibration.m

@@ -52,3 +52,26 @@
     AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
 }
 
+JNIEXPORT void JNICALL Java_com_gluonhq_attach_vibration_impl_IOSVibrationService_doHapticFeedback
+(JNIEnv *env, jclass jClass,jint style)
+{
+    UIImpactFeedbackStyle feedbackStyle;
+
+    switch (style) {
+        case 1:
+            feedbackStyle = UIImpactFeedbackStyleLight;
+            break;
+        case 2:
+            feedbackStyle = UIImpactFeedbackStyleMedium;
+            break;
+        case 3:
+            feedbackStyle = UIImpactFeedbackStyleHeavy;
+            break;
+        default:
+            feedbackStyle = UIImpactFeedbackStyleMedium;
+            break;
+    }
+
+    UIImpactFeedbackGenerator *feedback = [[UIImpactFeedbackGenerator alloc]initWithStyle:UIImpactFeedbackStyleMedium];
+    [feedback impactOccurred];
+}