react-native-navigation/lib/ios/RNNStackController.m

#import "RNNStackController.h"
#import "RNNComponentViewController.h"
#import "UIViewController+Utils.h"
#import "StackControllerDelegate.h"

@implementation RNNStackController {
    UIViewController* _presentedViewController;
    StackControllerDelegate* _stackDelegate;
}

- (instancetype)initWithLayoutInfo:(RNNLayoutInfo *)layoutInfo creator:(id<RNNComponentViewCreator>)creator options:(RNNNavigationOptions *)options defaultOptions:(RNNNavigationOptions *)defaultOptions presenter:(RNNBasePresenter *)presenter eventEmitter:(RNNEventEmitter *)eventEmitter childViewControllers:(NSArray *)childViewControllers {
    self = [super initWithLayoutInfo:layoutInfo creator:creator options:options defaultOptions:defaultOptions presenter:presenter eventEmitter:eventEmitter childViewControllers:childViewControllers];
    _stackDelegate = [[StackControllerDelegate alloc] initWithEventEmitter:self.eventEmitter];
    self.delegate = _stackDelegate;
    self.navigationBar.prefersLargeTitles = YES;
    return self;
}

- (void)setDefaultOptions:(RNNNavigationOptions *)defaultOptions {
	[super setDefaultOptions:defaultOptions];
	[self.presenter setDefaultOptions:defaultOptions];
}

- (void)viewDidLayoutSubviews {
	[super viewDidLayoutSubviews];
	[self.presenter applyOptionsOnViewDidLayoutSubviews:self.resolveOptions];
}

- (void)mergeChildOptions:(RNNNavigationOptions *)options child:(UIViewController *)child {
    if (child.isLastInStack) {
        [self.presenter mergeOptions:options resolvedOptions:self.resolveOptions];
    }
    [self.parentViewController mergeChildOptions:options child:child];
}

- (UIStatusBarStyle)preferredStatusBarStyle {
	return [_presenter getStatusBarStyle:self.resolveOptions];
}

- (UIViewController *)popViewControllerAnimated:(BOOL)animated {
    [self prepareForPop];
	return [super popViewControllerAnimated:animated];
}

- (void)prepareForPop {
    if (self.viewControllers.count > 1) {
        UIViewController *controller = self.viewControllers[self.viewControllers.count - 2];
        if ([controller isKindOfClass:[RNNComponentViewController class]]) {
            RNNComponentViewController *rnnController = (RNNComponentViewController *)controller;
            [self.presenter applyOptionsBeforePopping:rnnController.resolveOptions];
        }
    }
}

- (UIViewController *)childViewControllerForStatusBarStyle {
	return self.topViewController;
}

@end