Question

• (UIPageViewControllerSpineLocation)pageViewController:(UIPageViewController *)pageViewController
  spineLocationForInterfaceOrientation:(UIInterfaceOrientation)orientation

this delegate is not calling ……..

i have also used

NSDictionary *options =[NSDictionary dictionaryWithObject:[NSNumber numberWithInteger:UIPageViewControllerSpineLocationMid]forKey: UIPageViewControllerOptionSpineLocationKey];

to call UIPageViewControllerSpineLocationMid method

UIPageViewControllerSpineLocationMin and UIPageViewControllerSpineLocationMax methods are calling..

Code runs finely when i run it seperately….. but When i integrate the code the UIPageViewControllerSpineLocationMid is not working and that delegate is not calling ….

Why this so……

Answer 1

I can see in the class ref on

http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIPageViewControllerDelegateProtocolRef/UIPageViewControllerDelegate.html

that the delegate is only called if you got the transition style UIPageViewControllerTransitionStylePageCurl. Probably that is your problem.

Discussion

Use this method to change the spine location when the device orientation changes, as well as setting new view controllers and changing the double-sided state.
This method is called only if the transition style is UIPageViewControllerTransitionStylePageCurl.