[iOS] UISwipeGestureRecognizer 등록하는 법

UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeLeftAction:)];

swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;

swipeLeft.numberOfTouchesRequired = 1;

swipeLeft.delegate = self;

[self.view addGestureRecognizer:swipeLeft];