I have a `pageViewController` - I would like to add a scrollview with an image view behind it and while I scroll the pages in my `pageViewController` - the background should scroll in the same direction but with a lower see. I use `auto-layout` in storyboards:

so I add the pageViewController:

```
pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll
                                                 navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal
                                                               options:nil];
pageController.delegate = self;
pageController.dataSource = self;
[self addChildViewController:pageController];

CGRect pageFrame = self.view.frame;
pageFrame.origin.y += 50.f;
pageFrame.size.height -= 50.f;
pageController.view.frame = pageFrame;
pageController.view.backgroundColor = [UIColor clearColor];
[self.view addSubview:pageController.view];

```

get it's scrollview:

```
for (UIView *possibleScrollView in pageController.view.subviews) {
    if ([possibleScrollView isKindOfClass:[UIScrollView class]]) {
        ((UIScrollView *)possibleScrollView).delegate = self;
    }
}

```

and listening for its delegate:

```
- (void) scrollViewDidScroll:(UIScrollView *)scrollView
{
    NSLog(@"%f", scrollView.contentOffset.x);
    [parlaxScrollView setContentOffset:CGPointMake(scrollView.contentOffset.x * .2f, scrollView.contentOffset.y) animated:NO];
}

```

And here I have some confusing results when I scrolling to the second page:

```
378.500000
386.500000
403.500000
419.000000
448.000000
469.000000
...
747.000000
750.000000
375.000000 ///!!!!!THE CONTENT OFFSET RETURNED TO THE INITIAL VALUE!!!!!

```

Why does my content view offset reset? Wha't wrong with it?