Question

I’m asking for your help for i think a simple problem but i didn’t manage to understand what’s happening with my view.
I’m displaying an OpengGL view launched by my UIViewController like this:

  //OpenGL view init
CGRect mainframe=CGRectMake(0,0,768,708);
GLView= [[OpenGLView alloc] initWithFrame:mainframe];

So then it is displayed well, but i tried to add a swipe gesture recognizer to call a function on this view:

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

        ...  

        oneFingerSwipeRight =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(transitionCubeRight:)];
        oneFingerSwipeRight.direction=UISwipeGestureRecognizerDirectionRight;

        oneFingerSwipeLeft =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(transitionCubeLeft:)];
        oneFingerSwipeLeft.direction=UISwipeGestureRecognizerDirectionLeft;

        [self addGestureRecognizer:oneFingerSwipeRight];
        [self addGestureRecognizer:oneFingerSwipeLeft];

        ...
    }
    return self;
}

And then when the view appear, i’m doing the action swiping on the right or on the left and this appear in the terminal:

2012-04-17 12:00:15.735 MultipleViewsApp[4372:f803] -[OpenGLView transitionCubeLeft:]: unrecognized selector sent to instance 0xcd38bd0
2012-04-17 12:00:15.736 MultipleViewsApp[4372:f803] Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[OpenGLView transitionCubeLeft:]: unrecognized selector sent to instance 0xcd38bd0’
First throw call stack:
(0x1764052 0x18f5d0a 0x1765ced 0x16caf00 0x16cace2 0x622e39 0x622143 0x6233cf 0x625a31 0x62598c 0x61e3e7 0x386812 0x386ba2 0x36d384 0x360aa9 0x293dfa9 0x17381c5 0x169d022 0x169b90a 0x169adb4 0x169accb 0x293c879 0x293c93e 0x35ea9b 0x2518 0x2475)

my functions “transitionCubeLeft”/”transitionCubeLeft” contains just an NSLOG but nothing else relevant for this.
I’ll be very gratefull if someone could help me to understand this problem.
thankss

Answer 1

It looks like you have transitionCubeLeft/transitionCubeRight defined without parameters.

Change

 oneFingerSwipeRight =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(transitionCubeRight:)];
 oneFingerSwipeRight.direction=UISwipeGestureRecognizerDirectionRight;

 oneFingerSwipeLeft =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(transitionCubeLeft:)];
 oneFingerSwipeLeft.direction=UISwipeGestureRecognizerDirectionLeft;

 [self addGestureRecognizer:oneFingerSwipeRight];
 [self addGestureRecognizer:oneFingerSwipeLeft];

to

 oneFingerSwipeRight =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(transitionCubeRight)];
 oneFingerSwipeRight.direction=UISwipeGestureRecognizerDirectionRight;

 oneFingerSwipeLeft =[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(transitionCubeLeft)];
 oneFingerSwipeLeft.direction=UISwipeGestureRecognizerDirectionLeft;

 [self addGestureRecognizer:oneFingerSwipeRight];
 [self addGestureRecognizer:oneFingerSwipeLeft];