How to set page mode to single mode from double mode - iphone

Question

Can we change the spine location without changing orientations. Like for some views it is set to max and for some views it should be mid. Is it possible to active this functionality.
This is the code i am using, but don't know what to modify in it so that without changing orientation i can set spine location to max and set one page mode rather than two page mode. Actually is started with two page mode when app runs but later it requires to move to single page mode, that is not getting possible, it gives error that you are providing one view but than two required.
Can anyone guide for this.
-(id)initWithViewControllers:(NSMutableArray *)Controllers
{
self = [super initWithNibName:nil bundle:nil];
if(self)
{
self.VControllers = Controllers;
pageController = [[UIPageViewController alloc]initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl navigationOrientation: UIPageViewControllerNavigationOrientationHorizontal options:nil];
self.pageController.view.frame = CGRectMake(12.0f, 10.0f, 748.0f, 985.0f);
self.pageController.delegate = self;
self.pageController.dataSource = self;
[self.pageController setViewControllers:[NSArray arrayWithObject:[VControllers objectAtIndex:0] ] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:^(BOOL finished)
{
}];
[self addChildViewController:self.pageController];
[self.view addSubview:self.pageController.view];
check=YES;
}
return self;
}
- (UIPageViewControllerSpineLocation)pageViewController:(UIPageViewController *)pageViewController
spineLocationForInterfaceOrientation:(UIInterfaceOrientation)orientation
{
if(UIInterfaceOrientationIsPortrait(orientation))
{
//Set the array with only 1 view controller
UIViewController *currentViewController = [self.pageController.viewControllers objectAtIndex:0];
NSArray *viewControllers = [NSArray arrayWithObject:currentViewController];
[self.pageController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
//Important- Set the doubleSided property to NO.
self.pageController.doubleSided = NO;
//Return the spine location
return UIPageViewControllerSpineLocationMax;
}
else
{
NSArray *viewControllers = nil;
exampleViewController *currentViewController = [self.pageController.viewControllers objectAtIndex:0];
NSUInteger currentIndex = [self.VControllers indexOfObject:currentViewController];
if(currentIndex == 0 || currentIndex %2 == 0)
{
UIViewController *nextViewController = [self pageViewController:self.pageController viewControllerAfterViewController:currentViewController];
viewControllers = [NSArray arrayWithObjects:currentViewController, nextViewController, nil];
}
else
{
UIViewController *previousViewController = [self pageViewController:self.pageController viewControllerBeforeViewController:currentViewController];
viewControllers = [NSArray arrayWithObjects:previousViewController, currentViewController, nil];
}
//Now, set the viewControllers property of UIPageViewController
[self.pageController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
return UIPageViewControllerSpineLocationMid;
}
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
int index = [self.VControllers indexOfObject:viewController];
i=index;
//[self checkViewControllers];
if (index - 1 >= 0)
{
ind = index;
return [self.VControllers objectAtIndex:index - 1];
}
return nil;
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
int index = [self.VControllers indexOfObject:viewController];
i=index;
if (index + 1 < [self.VControllers count])
{
ind = index;
return [self.VControllers objectAtIndex:index + 1];
}
if (ind1 + 1 < [self.VControllers count])
{
ind = index;
return [self.VControllers objectAtIndex:index + 1];
}
return nil;
}

Answer 1

If you want to change the spine location after the UIPageViewController is already initialized I think you may need to create a new one, with the new spine location, and replace the old one with it.
I guess the current implementation only considers setting the spine location while initializing or when changing orientations.
You may open a bug for Apple so they implement that in the future.