UIPageViewController gesture is calling viewControllerAfter: but doesn't animate

Question

I have a really interesting issue with UIPageViewController.

My project is set up very similarly to the example Page Based Application template. Every now and then (

Answer 1

try this...

    - (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
 {   

        for (UIGestureRecognizer *gr in pageViewController.gestureRecognizers) {
                if([gr isKindOfClass:[UIPanGestureRecognizer class]])
                {
                    UIPanGestureRecognizer *pgr = (UIPanGestureRecognizer*)gr;
                    CGPoint velocity = [pgr velocityInView:pageViewController.view];
                    BOOL verticalSwipe = fabs(velocity.y) > fabs(velocity.x);
                    if(verticalSwipe)
                        return nil;
                }
            }
    ....
}