+1  A: 

For example try following code (add it to your view):

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{
    UITouch *touch = [touches anyObject];
    NSUInteger tapCount = [touch tapCount];
    CGPoint location = [touch locationInView:self.view];

    switch (tapCount)
    {
         case 1:
         {
              UIView *view = [[UIView alloc] initWithFrame: CGRectMake(0.0f, 0.0f, 320.0f, 480.0f)];
              view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
              view.backgroundColor = [UIColor whiteColor];

              [self.view addSubview:view];
              [view release];
         }
         break;
    }
}
Harri Siirak