react-native-navigation/lib/ios/UINavigationController+RNNO...

#import "UINavigationController+RNNOptions.h"
#import "RNNFontAttributesCreator.h"

const NSInteger BLUR_TOPBAR_TAG = 78264802;

@implementation UINavigationController (RNNOptions)

- (void)setRootBackgroundImage:(UIImage *)backgroundImage {
	UIImageView* backgroundImageView = (self.view.subviews.count > 0) ? self.view.subviews[0] : nil;
	if (![backgroundImageView isKindOfClass:[UIImageView class]]) {
		backgroundImageView = [[UIImageView alloc] initWithFrame:self.view.bounds];
		[self.view insertSubview:backgroundImageView atIndex:0];
	}
	
	backgroundImageView.layer.masksToBounds = YES;
	backgroundImageView.image = backgroundImage;
	[backgroundImageView setContentMode:UIViewContentModeScaleAspectFill];
}

- (void)setNavigationBarTestId:(NSString *)testID {
	self.navigationBar.accessibilityIdentifier = testID;
}

- (void)setNavigationBarVisible:(BOOL)visible animated:(BOOL)animated {
	[self setNavigationBarHidden:!visible animated:animated];
}

- (void)hideBarsOnScroll:(BOOL)hideOnScroll {
	self.hidesBarsOnSwipe = hideOnScroll;
}

- (void)setBarStyle:(UIBarStyle)barStyle {
	self.navigationBar.barStyle = barStyle;
}

- (void)setNavigationBarBlur:(BOOL)blur {
	if (blur && ![self.navigationBar viewWithTag:BLUR_TOPBAR_TAG]) {
		[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
		self.navigationBar.shadowImage = [UIImage new];
		UIVisualEffectView *blur = [[UIVisualEffectView alloc] initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
		CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame];
		blur.frame = CGRectMake(0, -1 * statusBarFrame.size.height, self.navigationBar.frame.size.width, self.navigationBar.frame.size.height + statusBarFrame.size.height);
		blur.userInteractionEnabled = NO;
		blur.tag = BLUR_TOPBAR_TAG;
		[self.navigationBar insertSubview:blur atIndex:0];
		[self.navigationBar sendSubviewToBack:blur];
	} else {
		UIView *blur = [self.navigationBar viewWithTag:BLUR_TOPBAR_TAG];
		if (blur) {
			[self.navigationBar setBackgroundImage: nil forBarMetrics:UIBarMetricsDefault];
			self.navigationBar.shadowImage = nil;
			[blur removeFromSuperview];
		}
	}
}

- (void)setNavigationBarClipsToBounds:(BOOL)clipsToBounds {
	self.navigationBar.clipsToBounds = clipsToBounds;
}

- (CGFloat)getTopBarHeight {
    return self.navigationBar.frame.size.height;
}

@end