Keep presenting controller in charge of status bar appearance during modal presentation. Useful on modal presentations that only partially cover the window.

BasePresentationController.h

//
//  BasePresentationController.h
//
//  Created by pronebird on 4/27/16.
//  Copyright © 2016 Andrey Mikhaylov. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface BasePresentationController : UIPresentationController

/**
 *  Override this property and return NO if you wish presenting controller
 *  to remain in charge of status bar appearance.
 *  Default: YES
 */
@property (nonatomic, readonly) BOOL presentedControllerCapturesStatusBarAppearance;

@end

BasePresentationController.m

//
//  BasePresentationController.m
//
//  Created by pronebird on 4/27/16.
//  Copyright © 2016 Andrey Mikhaylov. All rights reserved.
//

#import "BasePresentationController.h"

@interface UIPresentationController ()

- (BOOL)_shouldChangeStatusBarViewController;

@end

@implementation BasePresentationController

- (BOOL)presentedControllerCapturesStatusBarAppearance {
    return YES;
}

/*
 @TODO: This is a private API to prevent presented controller
 from becoming responsible for statusbar appearance. This should be fixed
 in official way.
 */
- (BOOL)_shouldChangeStatusBarViewController {
    if([self presentedControllerCapturesStatusBarAppearance]) {
        return [super _shouldChangeStatusBarViewController];
    }
    
    if(self.presentedViewController.modalPresentationCapturesStatusBarAppearance) {
        NSLog(@"%@ implements presentedControllerCapturesStatusBarAppearance and returns YES, however presented controller has modalPresentationCapturesStatusBarAppearance set to YES. Make sure modalPresentationCapturesStatusBarAppearance is set to NO otherwise presenting controller won't remain in charge of status bar appearance.", NSStringFromClass([self class]));
    }

    if([self.presentedViewController isBeingPresented]) {
        return NO;
    }

    return YES;
}

@end