Essential Lines to make a UIModalPresentationPopover work on iPhone / iOS 8.3

HelpViewController.m

#import "HelpViewController.h"

@interface HelpViewController ()

@end

@implementation HelpViewController


-(instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.modalPresentationStyle = UIModalPresentationPopover;
        self.popoverPresentationController.delegate = self;
        self.popoverPresentationController.backgroundColor = [UIColor complementaryColor];
        self.preferredContentSize = CGSizeMake(250, 64);
        self.popoverPresentationController.passthroughViews = nil;
    }
    return self;
}


- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {
    return UIModalPresentationNone; //You have to specify this particular value in order to make it work on iPhone.
}

- (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;
}

@end