iphone - UIPageViewController: display error when user aborts pangesture -


here problem: i've implemented calendar in week mode, navigation between weeks done using uipageviewcontroller in pagecurl mode (quite similar standard calendar of ipad). works except when user aborts page navigation. if calendar showing current week , user pan finger show next week aborts gesture , doesn't turn page, datasource still display next week instead of staying @ current week.

i tried using method

        - (void)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller                     didfinishanimating:(bool)finished             previousviewcontrollers:(nsarray*)previousviewcontrollers                transitioncompleted:(bool)completed

and detecting when pangesture aborted , manually reset previous viewcontroller result not @ all.

here code datasource , delegate methods

- (uiviewcontroller *)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller       viewcontrollerbeforeviewcontroller:(uiviewcontroller *)viewcontroller {     if (_pageisanimating) {         return nil;     }         [[mcalendarmanager sharedcalendar] previousweek];      mcalendarcontentviewcontroller * contentviewcontroller = [self.storyboard instantiateviewcontrollerwithidentifier:@"calendarcontentviewcontroller"];      return contentviewcontroller; }  - (uiviewcontroller *)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller        viewcontrollerafterviewcontroller:(uiviewcontroller *)viewcontroller {     if (_pageisanimating) {         return nil;     }        [[mcalendarmanager sharedcalendar] nextweek];      mcalendarcontentviewcontroller * contentviewcontroller = [self.storyboard  instantiateviewcontrollerwithidentifier:@"calendarcontentviewcontroller"];       return contentviewcontroller; }  - (void)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller  willtransitiontoviewcontrollers:(nsarray *)pendingviewcontrollers {     _pageisanimating = yes; }  - (void)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller         didfinishanimating:(bool)finished previousviewcontrollers:(nsarray *)previousviewcontrollers        transitioncompleted:(bool)completed {      if (completed || finished) {  // turn either finished or aborted         _pageisanimating = no;     }      if (finished && !completed) {//turn aborted          //do here not changing viewcontroller     } }

does has idea how solve this?

thanks in advance.

regards


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