how to add a gesture to skView?

Question

I need to add several swipe gestures to my scene on a game. From what I know, this can only be done programmatically, unfortunately I have never added gestures in this way, I have always used IB. I know I need to initialize a gesture recognizer, using initWithTarget:action: and I know how to set its properties, what I don't know is how to make this gesture do stuff. I assume it is through the action parameter @selector but this seems to never get called. Am I doing this wrong? here is what I have:

UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self
                                        action:@selector(animateSwipeRightLeft)];
[self.view addGestureRecognizer:swipeRight];

and for the selector I have:

-(void)animateSwipeRightLeft {

    //do stuff...
}

so it comes down to a few related questions: am I setting this up correctly? if so, why is my selector not being called? and if I am wrong about not being able to do this with IB, how?

also, if it helps, my gestures are set up in the initWithSize method for my scene.

check that self.view isn't nil at the time you are adding the recognizer. It will be nil in the init method of a node. — LearnCocos2D, Jun 18 '14 at 22:15
add the gesture recognizer after init, or where you create the node that currently contains the addgesturerecognizer code — LearnCocos2D, Jun 19 '14 at 07:31

Andrey Gordeev · Accepted Answer · 2014-06-19T09:11:23.017

0

You should add gesture recognizers in SKScene's didMoveToView method.

- (void)didMoveToView:(SKView *)view {
    UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self
                                    action:@selector(animateSwipeRightLeft)];
    [self.view addGestureRecognizer:swipeRight];
}

self.view is nil inside init methods

edited Jun 19 '14 at 09:11

answered Jun 19 '14 at 09:05

Andrey Gordeev

27,503
11
123
150

how to add a gesture to skView?

1 Answers1

Linked