Question

I need to catch swipe-action only on special area. But debugger tells unrecognized selector sent to instance

- (void)viewDidLoad
{
    UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc]
          initWithTarget:self.viewName action:@selector(didSwipe:)];
    swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.view addGestureRecognizer:swipeLeft];
}

-(void)didSwipe:(UISwipeGestureRecognizer*)swipe{
   NSLog(@"swiped left");
}

whats wrong?

Answer 1

You probably want the target to be self not self.imageName.

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Edit In response to your comments.

UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc]
      initWithTarget:self action:@selector(didSwipe:)];
swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
[self.viewName addGestureRecognizer:swipeLeft];

You want your target to be the place where the method lives. In this case that should be self. You want to add your gesture recognizer to the view that is supposed to be touched, self.viewName.