TapGestureRecognizer

    self.gestureRecognizer   = [[UITapGestureRecognizer alloc]
                                             initWithTarget:self action:@selector(handleTap:)];
    self.gestureRecognizer.numberOfTapsRequired = 1;
    [self.view addGestureRecognizer:self.gestureRecognizer];
    self.gestureRecognizer.cancelsTouchesInView = NO;
    
    -(void)handleTap:(UITapGestureRecognizer *)recognizer
{
    CGPoint translatedPoint = [recognizer locationInView:self.view];
    UIView *viewTouched = [recognizer.view hitTest:translatedPoint withEvent:nil];
    if(viewTouched != someView)
    {
        // some action
    }
}