iOS中关于Taptic-Engine震动反馈的深入解析

AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

__OSX_AVAILABLE_STARTING(__MAC_10_5,__IPHONE_2_0);

CF_ENUM(SystemSoundID)
{
 kSystemSoundID_UserPreferredAlert = 0x00001000,
 kSystemSoundID_FlashScreen   = 0x00000FFE,
  // this has been renamed to be consistent
 kUserPreferredAlert  = kSystemSoundID_UserPreferredAlert
};

CF_ENUM(SystemSoundID)
{
 kSystemSoundID_Vibrate    = 0x00000FFF
};

// 普通短震，3D Touch 中 Peek 震动反馈
AudioServicesPlaySystemSound(1519);

// 普通短震，3D Touch 中 Pop 震动反馈
AudioServicesPlaySystemSound(1520);

// 连续三次短震
AudioServicesPlaySystemSound(1521);

id tapticEngine = [[UIDevice currentDevice] performSelector: NSSelectorFromString(@"_tapticEngine")
              withObject:nil];
[tapticEngine performSelector: NSSelectorFromString(@"actuateFeedback:")
      withObject:@(0)];

id tapticEngine = [[UIDevice currentDevice] performSelector: NSSelectorFromString(@"_tapticEngine")
              withObject:nil];

SEL selector = NSSelectorFromString(@"actuateFeedback:");
int32_t arg = 1001;
 
NSInvocation *inv = [NSInvocation invocationWithMethodSignature:[tapticEngine methodSignatureForSelector:selector]];
[inv setTarget:tapticEngine];
[inv setSelector:selector];
[inv setArgument:&arg atIndex:2];
[inv invoke];

UIImpactFeedbackGenerator *generator = [[UIImpactFeedbackGenerator alloc] initWithStyle: UIImpactFeedbackStyleLight];
[generator prepare];
[generator impactOccurred];

- (IBAction)gestureHandler:(UIPanGestureRecognizer *)sender {
 
 switch (sender.state) {
  case UIGestureRecognizerStateBegan:
   
   // Instantiate a new generator.
   self.feedbackGenerator = [[UISelectionFeedbackGenerator alloc] init];
   
   // Prepare the generator when the gesture begins.
   [self.feedbackGenerator prepare];
   
   break;
   
  case UIGestureRecognizerStateChanged:
   
   // Check to see if the selection has changed...
   if ([self myCustomHasSelectionChangedMethodWithTranslation:[sender translationInView: self.view]]) {
    
    // Trigger selection feedback.
    [self.feedbackGenerator selectionChanged];
    
    // Keep the generator in a prepared state.
    [self.feedbackGenerator prepare];
 
   }
   
   break;
   
  case UIGestureRecognizerStateCancelled:
  case UIGestureRecognizerStateEnded:
  case UIGestureRecognizerStateFailed:
   
   // Release the current generator.
   self.feedbackGenerator = nil;
   
   break;
   
  default:
   
   // Do nothing.
   break;
 }
}