Zoom in/out gesture UIView

[blackspiderman]

Hi, i've been trying to capture gesture zoom in/out in a UIView.

Code:
UITouch *first = twoTouches objectAtIndex:0;
UITouch *second = twoTouches objectAtIndex:1;
CGPoint firstPoint = first locationInView:self;
CGPoint secondPoint = second locationInView:self;
CGFloat initialDistance = distanceBetweenPoints(firstPoint, secondPoint);

I'm using the function distanceBetweenPoints, the problem is that firstPoint or secondPoint always is 0.00, 0.00 and for that reason the result is the value of one of them.

I need that the booth values should be distint to zero for obtain the real distance.

The frame of the view is: (0, 0, 320, 417).

The functionality that i'm developing is something like zoom in/out of google maps.

Thanks,

[blackspiderman]

I found the answer.

The problem was that the uiview need it the attribute self.multipleTouchEnabled = YES;

For that reason the multitouch worked but not so well.

Thanks,