From 60cac9fa8bf87632e82270a0266b9ad4e41103d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gruber=20Kristo=CC=81f?= <gk@lka.hu>
Date: Fri, 30 Mar 2018 20:18:58 +0200
Subject: [PATCH] Support for black navigation bar style and landscape
 orientations

---
 Pod/Classes/GKFadeNavigationController.m | 38 ++++++++++++++++++++++--
 README.md                                |  3 +-
 2 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/Pod/Classes/GKFadeNavigationController.m b/Pod/Classes/GKFadeNavigationController.m
index 45db871..4f35e26 100644
--- a/Pod/Classes/GKFadeNavigationController.m
+++ b/Pod/Classes/GKFadeNavigationController.m
@@ -14,7 +14,6 @@
 @interface GKFadeNavigationController () <UINavigationControllerDelegate>
 
 @property (nonatomic, strong) UIVisualEffectView *visualEffectView;
-@property (nonatomic, strong) UIView *fakeNavigationBarBackground;
 
 @property (nonatomic) GKFadeNavigationControllerNavigationBarVisibility navigationBarVisibility;
 @property (nonatomic, strong) UIColor *originalTintColor;
@@ -39,6 +38,13 @@ - (void)viewDidLoad {
     [self updateNavigationBarVisibilityForController:self.topViewController animated:NO];
 }
 
+- (void)viewDidLayoutSubviews {
+    CGFloat navigationBarHeight = CGRectGetHeight(self.navigationBar.frame);
+    CGFloat statusBarHeight = [self statusBarHeight];
+    
+    self.visualEffectView.frame = CGRectMake(0, -statusBarHeight, self.view.frame.size.width, navigationBarHeight+statusBarHeight);
+}
+
 #pragma mark - Accessors
 
 - (void)setNavigationBarVisibility:(GKFadeNavigationControllerNavigationBarVisibility)navigationBarVisibility {
@@ -123,7 +129,11 @@ - (UIVisualEffectView *)visualEffectView {
     if (!_visualEffectView) {
         // Create a the fake navigation bar background
         UIVisualEffect *blurEffect;
-        blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleExtraLight];
+        if ([self isNavigationStyleBlack]) {
+            blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
+        } else {
+            blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleExtraLight];
+        }
 
         CGFloat navigationBarHeight = CGRectGetHeight(self.navigationBar.frame);
         CGFloat statusBarHeight = [self statusBarHeight];
@@ -163,7 +173,11 @@ - (UIStatusBarStyle)preferredStatusBarStyle {
     if (self.navigationBarVisibility == GKFadeNavigationControllerNavigationBarVisibilityHidden) {
         return UIStatusBarStyleLightContent;
     } else {
-        return UIStatusBarStyleDefault;
+        if ([self isNavigationStyleBlack]) {
+            return UIStatusBarStyleLightContent;
+        } else {
+            return UIStatusBarStyleDefault;
+        }
     }
 }
 
@@ -243,10 +257,16 @@ - (void)showCustomNavigationBar:(BOOL)show withFadeAnimation:(BOOL)animated {
             self.visualEffectView.alpha = 1;
             self.navigationBar.tintColor = [self originalTintColor];
             [self.navigationBar setTitleVerticalPositionAdjustment:0 forBarMetrics:UIBarMetricsDefault];
+            [self.navigationBar setTitleVerticalPositionAdjustment:0 forBarMetrics:UIBarMetricsDefaultPrompt];
+            [self.navigationBar setTitleVerticalPositionAdjustment:0 forBarMetrics:UIBarMetricsCompact];
+            [self.navigationBar setTitleVerticalPositionAdjustment:0 forBarMetrics:UIBarMetricsCompactPrompt];
         } else {
             self.visualEffectView.alpha = 0;
             self.navigationBar.tintColor = [UIColor whiteColor];
             [self.navigationBar setTitleVerticalPositionAdjustment:-500 forBarMetrics:UIBarMetricsDefault];
+            [self.navigationBar setTitleVerticalPositionAdjustment:-500 forBarMetrics:UIBarMetricsDefaultPrompt];
+            [self.navigationBar setTitleVerticalPositionAdjustment:-500 forBarMetrics:UIBarMetricsCompact];
+            [self.navigationBar setTitleVerticalPositionAdjustment:-500 forBarMetrics:UIBarMetricsCompactPrompt];
         }
     } completion:^(BOOL finished) {
         [self setNeedsStatusBarAppearanceUpdate];
@@ -277,4 +297,16 @@ - (void)setNeedsNavigationBarVisibilityUpdateAnimated:(BOOL)animated {
     }
 }
 
+#pragma mark - Helper
+
+- (BOOL)isNavigationStyleBlack {
+    if (self.navigationBar.barStyle == UIBarStyleBlackTranslucent ||
+        self.navigationBar.barStyle == UIBarStyleBlack ||
+        self.navigationBar.barStyle == UIBarStyleBlackOpaque) {
+        return YES;
+    } else {
+        return NO;
+    }
+}
+
 @end
diff --git a/README.md b/README.md
index 3c607a1..68872c8 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ This is an example implementation of a `UINavigationController` with support of
 - Native looking translucent header
 - Demo project with elastic header image
 - iPhone X support
+- Black navigation bar style support
 
 ## Installation
 
@@ -52,8 +53,6 @@ Works fine with iOS 11.
 
 ## Known limitations
 
-- Does not handle screen rotation fully
-- Supports only light navigation bar style out of the box
 - Items under the header are not clickable
 - Changing the status bar color happens in `-viewDidAppear` currently