Detect when UIGestureRecognizer is up, down, left and right Cocos2d

Question

I have a CCSprite that I want to move around using gestures. Problem is I\'m completely new to Cocos2D. I want my sprite to perform one action when the gesture is up, anothe

Answer 1

Even though there's lots of good info here, I couldn't find a quick answer that had it all.

If you want to differentiate whether a swipe is left or right or up or down, you need to create a new UISwipeGestureRecognizer for each direction.

However! This is not so bad, because you can route each of your gesture recognizers to the same selector, that can then use a switch statement as you might expect.

First, add gesture recognizers for each direction and route them to the same selector:

- (void)setupSwipeGestureRecognizers
{
    UISwipeGestureRecognizer *rightSwipeGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(userDidSwipeScreen:)];
    rightSwipeGestureRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
    UISwipeGestureRecognizer *leftSwipeGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(userDidSwipeScreen:)];
    leftSwipeGestureRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.view addGestureRecognizer:rightSwipeGestureRecognizer];
    [self.view addGestureRecognizer:leftSwipeGestureRecognizer];
}

Second, differentiate between the directions with a switch statement:

- (void)userDidSwipeScreen:(UISwipeGestureRecognizer *)swipeGestureRecognizer
{
    switch (swipeGestureRecognizer.direction) {
        case UISwipeGestureRecognizerDirectionLeft: {
            // Handle left
            break;
        }
        case UISwipeGestureRecognizerDirectionRight: {
            // Handle right
            break;
        }
        default: {
            break;
        }
    }
}