Prevent a UIPopover from being presented as UIPageSheet on iPhone 6 plus in landscape

Question

I'm trying to show a popOver with a UISlider inside, to allow an user to control the textSize of a WKWebView.

Here is how I did it:

MYCustomViewController *popoverContent = [[self storyboard] instantiateViewControllerWithIdentifier:@"MYCustomViewController"];
    popoverContent.delegate = self;
    popoverContent.modalPresentationStyle = UIModalPresentationPopover;
    UIPopoverPresentationController *popover = popoverContent.popoverPresentationController;
    popoverContent.preferredContentSize = CGSizeMake(220, 40);
    popover.delegate = self;
    popover.barButtonItem = (UIBarButtonItem *)sender;

    [self presentViewController:popoverContent animated:YES completion:nil];

In the custom ViewController I just added a delegate to get the value of the UISlider

I also implemented the method:

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller
{
  return UIModalPresentationNone;
}

Everything works just fine on every device except the iPhone 6 Plus in Landscape (i.e. compact height), which displays the popover as UIPageSheet

Note: I present the popover from a UIbarButtonItem, in the detailViewController of a UISplitViewController

Answer 1

I solved this issue by implementing the new adaptivePresentationStyleForPresentationController:traitCollection: method of UIAdaptivePresentationControllerDelegate: as suggested by @Joshua

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller traitCollection:(UITraitCollection *)traitCollection {
    // This method is called in iOS 8.3 or later regardless of trait collection, in which case use the original presentation style (UIModalPresentationNone signals no adaptation)
    return UIModalPresentationNone;
}

UIModalPresentationNone tells the presentation controller to use the original presentation style which in your case will display a popover.