a range of 2 old points with the 2 new points in multi touch

Question

Hi there

I developing an iPhone game and having some problem now, could anyone help me out ?

I want to open a thing on the screen, the item in the centre of the screen, and I need 2 fingers to open it. Just put 2 fingers in and move horizontally to the certain points then let go, then the thing opens. I am making a range for the points. Because it is horizontal, so x is always changing so i don quite care for x, so do a range for y.

float rangeY = location3.y - location.y;

then i put the rangeY in a value, so if my 2 fingers move out of the range it will show error. But now however i move my 2 fingers it also says successful. Maybe my conditions are incorrect, could any experts take a look at my code and tell me why.

-(BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)events
{
    NSInteger touchCount = 0;
    //float rangeOfDistance = 0.0;
    NSSet *allTouches3 = [events allTouches];
    for( UITouch *touch in allTouches3)
    {
     location3 = [touch locationInView: [touch view]];
     location3 = [[Director sharedDirector] convertCoordinate: location3];

     NSLog(@"end TOUCHed x2: %3.3f, y2: %3.3f",location3.x,location3.y);
     touchCount++;
    }
//location is the points made when just put down the fingers, it is in the ccTouchesBegan
    float rangeY = location3.y - location.y;

    if (touchCount > 0 && touchCount ==2)
    {
     if (rangeY != 0.0 && rangeY < 10.0) 

      [self loadBoxOpenedScene];
    }
    else
    {
     NSLog(@"wrong direction");
    }

    return kEventHandled;   

}