ReactiveCocoa RACSubject Example

gistfile1.m

-(void)gestureRecognizerReceivedTouch:(UIPanGestureRecognizer *)recognizer {
   if (recognizer.state == UIGestureRecognizerStateBegan) {
       [self.gestureRecognizerIsRunningSubject sendNext:@(YES)];
   }

   else if (recognizer.state == UIGestureRecognizerStateChanged) {
       [self.gestureRecognizerValueSubject sendNext:[NSValue valueWithCGPoint:[recognizer locationInView:self.view]]];
   }

   else if (recognizer.state == UIGestureRecognizerStateEnded) {
       [self.gestureRecognizerIsRunningSubject sendNext:@(NO)];
   }
}