Native iOS device vibration

NativePlayHaptic.m

#if TARGET_OS_IOS
static CHHapticEngine* hapticEngine = nil;

void Native_PlayHaptic(float intensity, float duration)
{
    // Core Haptics available?
    if (@available(iOS 13.0,*)) {
        NSError *error = nil;

        if (!hapticEngine) {
            hapticEngine = [[CHHapticEngine alloc] initAndReturnError:&error];
            if (!error)
                [hapticEngine startAndReturnError:&error];
            if (error) {
                NSLog(@"Error creating haptic engine: %@", error.localizedDescription);
                return;
            }
        }

        // Clamp input
        intensity = fmaxf(0.0f, fminf(intensity, 1.0f));
        duration  = fmaxf(0.02f, duration);

        // vibration "rumble" event
        CHHapticEvent *event = [[CHHapticEvent alloc] initWithEventType:CHHapticEventTypeHapticContinuous
                                parameters:@[
                                    [[CHHapticEventParameter alloc] initWithParameterID:CHHapticEventParameterIDHapticIntensity value:intensity],
                                    [[CHHapticEventParameter alloc] initWithParameterID:CHHapticEventParameterIDHapticSharpness value:0.2]
                                ]
                                relativeTime:0
                                duration:duration];

        CHHapticPattern *pattern = [[CHHapticPattern alloc] initWithEvents:@[event]
                                    parameters:@[]
                                    error:&error];
        if (error)
            NSLog(@"Error creating haptic pattern: %@", error.localizedDescription);
        else {
            id<CHHapticPatternPlayer> player = [hapticEngine createPlayerWithPattern:pattern error:&error];
            if (!error)
                [player startAtTime:0 error:&error];
            if (error)
                NSLog(@"Error playing haptic pattern: %@", error.localizedDescription);
        }
        return;
    }

    // Fallback for older devices -> classic vibration
    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
}
#endif