Question

How will I go about touches moved finding distance when dragging my finger. Say my finger started at point A and goes to point B which is 10 pixels and goes back to point A which will be 20 pixels all together. How will I calculate that?

Answer 1

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
 UITouch *touch=[touches anyObject];
point1 = [touch locationInView:self];//(point2 is type of CGPoint)
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
 UITouch *touch=[touches anyObject];
point2 = [touch locationInView:self];//(point2 is type of CGPoint)
}

after difference of CGPOint x or y axis you can get the difference