CODEWITHSUNDEEP
iosxcodesigabrtuipageviewcontroller
Ryan H
Ryan H

Reputation: 547

UIPageViewController throws SIGABRT on orientation change

I have the following code to display a magazine type app. When the app is rotated it runs this code. I made sure that it is only run when rotated to supported orientations. When this function returns, the app fails with a SIGABRT. There is no other indication as to why.

I know it's this function because when I remove it the program does not fail.

- (UIPageViewControllerSpineLocation)pageViewController:(UIPageViewController *)pageViewController
                   spineLocationForInterfaceOrientation:(UIInterfaceOrientation)orientation
{
    //If portrait mode, change to single page view
    if(UIInterfaceOrientationIsPortrait(orientation)){
        UIViewController *currentViewController = [self.pageViewController.viewControllers objectAtIndex:0];
         NSArray *viewControllers = [NSArray arrayWithObject:currentViewController];
         [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];

         self.pageViewController.doubleSided = NO;

        return UIPageViewControllerSpineLocationMin;
    //If landscape mode, change to double page view    
    }else{
        //Get current view 
        UIViewController *currentViewController = [self.pageViewController.viewControllers objectAtIndex:0];

        //Create an array to store, views
        NSArray *viewControllers = nil;

         NSUInteger currentIndex = self.currentPage;

        //Conditional to check if needs page before or after
         if(currentIndex == 1 || currentIndex %2 == 1){
             UIViewController *nextViewController = [self pageViewController:self.pageViewController viewControllerAfterViewController:currentViewController];
             viewControllers = [NSArray arrayWithObjects:currentViewController,nextViewController, nil];
         }else{
             UIViewController *previousViewController = [self pageViewController:self.pageViewController viewControllerBeforeViewController:currentViewController];
             viewControllers = [NSArray arrayWithObjects:previousViewController, currentViewController, nil];
         }

        [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:NULL];
        return UIPageViewControllerSpineLocationMid;

    }
    //return UIPageViewControllerSpineLocationMid;
}

Upvotes: 2

Views: 1284

Answers (3)

HDdeveloper
HDdeveloper

Reputation: 4404

I was getting the same error

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'All provided view controllers ((
    "<ContentViewController: 0x6a7eac0>",
    "<ContentViewController: 0x6d89f10>"
)) must support the pending interface orientation (UIInterfaceOrientationLandscapeLeft)'

Adding the following to my PageModel class, where the page layout is designed worked for me:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

Upvotes: 0

borrrden
borrrden

Reputation: 33421

Well you didn't provide the output from the console, which would be nice. Giving the code a quick look I would guess that one of your controllers (next or previous) is nil, and since you can't insert nil into an NSArray (except as the last object) it is throwing an error.

EDIT Well, my guess was wrong. The error message is saying that the UIViewControllers you are giving to it do not support the orientation that the page controller needs. This is because you have a method called shouldRotateToInterfaceOrientation: in your child UIViewControllers, and they are returning no for (in this case) left landscape.

Upvotes: 0

Justin A.
Justin A.

Reputation: 73

Alas, borrrden is probably right. One of your IBOutlets is probably missing from your XIB. Make sure ALL of your IBs are connected properly, and if the problem continues, say so.

Upvotes: 1

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