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

#import "RNNLayoutOptions.h"
#import <React/RCTConvert.h>

@implementation RNNLayoutOptions

- (void)applyOn:(UIViewController *)viewController {
	if (self.screenBackgroundColor) {
		UIColor* screenColor = [RCTConvert UIColor:self.screenBackgroundColor];
		viewController.view.backgroundColor = screenColor;
	}
}

- (UIInterfaceOrientationMask)supportedOrientations {
	NSArray* orientationsArray = [self.orientation isKindOfClass:[NSString class]] ? @[self.orientation] : self.orientation;
	NSUInteger supportedOrientationsMask = 0;
	if (!orientationsArray || [self.orientation isEqual:@"default"]) {
		return [[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:[[UIApplication sharedApplication] keyWindow]];
	} else {
		for (NSString* orientation in orientationsArray) {
			if ([orientation isEqualToString:@"all"]) {
				supportedOrientationsMask = UIInterfaceOrientationMaskAll;
				break;
			}
			if ([orientation isEqualToString:@"landscape"]) {
				supportedOrientationsMask = (supportedOrientationsMask | UIInterfaceOrientationMaskLandscape);
			}
			if ([orientation isEqualToString:@"portrait"]) {
				supportedOrientationsMask = (supportedOrientationsMask | UIInterfaceOrientationMaskPortrait);
			}
			if ([orientation isEqualToString:@"upsideDown"]) {
				supportedOrientationsMask = (supportedOrientationsMask | UIInterfaceOrientationMaskPortraitUpsideDown);
			}
		}
	}
	
	return supportedOrientationsMask;
}


@end