Question

I am working on a app and i want to move a UIImage in the Y axis only, not in Xaxis, here’s what i did till now

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
 stretchPoint = [[touches anyObject]locationInView:self.view];
 arrowImage.center = stretchPoint;

}

The above code is moving the arrowImage in both the axis,
stretchPoint is an instance of CGPoint, My app is in portrait mode, can anyone give me a basic idea to how to do this, as the arrowImage is a instance of UIImageView.

Answer 1

this should work fine:

 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
        UITouch *touch = [touches anyObject];

        CGPoint currentPoint = [touch locationInView:self.view];
        currentPoint.x = arrowImage.center.x;

        arrowImage.center = currentPoint;
    }