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

#import "RNNLayoutManager.h"
#import "RNNLayoutProtocol.h"
#import "UIViewController+LayoutProtocol.h"

@implementation RNNLayoutManager

+ (UIViewController *)findComponentForId:(NSString *)componentId {
	for (UIWindow* window in UIApplication.sharedApplication.windows) {
		UIViewController* result = [self findChildComponentForParent:window.rootViewController ForId:componentId];
		if (result) {
			return result;
		}
	}
	
	return nil;
}

+ (UIViewController *)findChildComponentForParent:(UIViewController *)parentViewController ForId:(NSString *)componentId {
	if ([parentViewController.layoutInfo.componentId isEqualToString:componentId]) {
		return parentViewController;
	}
	
	if (parentViewController.presentedViewController) {
		if ([parentViewController.presentedViewController.layoutInfo.componentId isEqualToString:componentId]) {
			return parentViewController.presentedViewController;
		}
		
		UIViewController* modalResult = [self findChildComponentForParent:parentViewController.presentedViewController ForId:componentId];
		if (modalResult) {
			return modalResult;
		}
		
	}
	
	for (UIViewController* childVC in parentViewController.childViewControllers) {
		UIViewController* result = [self findChildComponentForParent:childVC ForId:componentId];
		if (result) {
			return result;
		}
	}
	
	return nil;
}


@end