Detect touches

gistfile1.m

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint p = [touch locationInView:aView];
    NSLog(@"Touch detected: x=%lf, y=%lf", p.x, p.y);
    if (0 <= p.y && p.y <= aView.frame.size.height 
        && 0 <= p.x && p.x <= aView.frame.size.width) 
    {
        //do something
    }
}