A UIViewController category to present viewcontroller as popover controller in iPhone devices

UIViewController+PresentationStyle.h

//
//  UIViewController+PresentationStyle.h
//
//  Created by Kalpesh Talkar on 22/08/16.
//  Copyright © 2016 Kalpesh Talkar. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface UIViewController (PresentationStyle) <UIPopoverPresentationControllerDelegate>

- (void)presentViewController:( UIViewController * _Nonnull)viewController fromBarButtonItem:(UIBarButtonItem * _Nonnull)barButtonItem animated:(BOOL)animated completion:(void (^ __nullable)(void))completion;

- (void)presentViewController:(UIViewController * _Nonnull)viewController fromView:(UIView * _Nonnull)source animated:(BOOL)animated completion:(void (^ __nullable)(void))completion;

@end

UIViewController+PresentationStyle.m

//
//  UIViewController+PresentationStyle.m
//
//  Created by Kalpesh Talkar on 22/08/16.
//  Copyright © 2016 Kalpesh Talkar. All rights reserved.
//

#import "UIViewController+PresentationStyle.h"

@implementation UIViewController (PresentationStyle)

#pragma mark - Style
- (void)setStyle:(UIModalPresentationStyle)presentationStyle :(UIModalTransitionStyle)transitionStyle {
    [self setModalPresentationStyle:presentationStyle];
    [self setModalTransitionStyle:transitionStyle];
}

#pragma mark - Present methods
- (void)presentViewController:( UIViewController * _Nonnull)viewController fromBarButtonItem:(UIBarButtonItem * _Nonnull)barButtonItem animated:(BOOL)animated completion:(void (^ __nullable)(void))completion {
    [self configurePopoverController:viewController withSource:barButtonItem];
    [self presentViewController:viewController animated:animated completion:completion];
}

- (void)presentViewController:(UIViewController * _Nonnull)viewController fromView:(UIView * _Nonnull)source animated:(BOOL)animated completion:(void (^ __nullable)(void))completion {
    [self configurePopoverController:viewController withSource:source];
    [self presentViewController:viewController animated:animated completion:completion];
}

#pragma mark - Configuration
- (void)configurePopoverController:(UIViewController *)viewController withSource:(id)source {
    [viewController setStyle:UIModalPresentationPopover :UIModalTransitionStyleCrossDissolve];
    UIPopoverPresentationController *popoverController = viewController.popoverPresentationController;
    popoverController.delegate = self;
    if ([source isKindOfClass:[UIBarButtonItem class]]) {
        popoverController.barButtonItem = source;
    } else {
        popoverController.sourceView = source;
        CGRect frame = ((UIView *)source).frame;
        popoverController.sourceRect = CGRectMake(frame.size.width/2, frame.size.height/4, frame.size.width, frame.size.height);
    }
    [popoverController setPermittedArrowDirections:UIPopoverArrowDirectionAny];
}

#pragma mark - UIPopoverPresentationControllerDelegate
- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {
    return UIModalPresentationNone;
}

@end