Allow prologue paged background colors to be set

- also remove the default background color from the navbar

Author: nheagy

WordPressAuthenticator/Authenticator/WordPressAuthenticatorStyles.swift

@@ -5,6 +5,8 @@ import WordPressShared
 // MARK: - WordPress Authenticator Styles
 //
 public struct WordPressAuthenticatorStyle {
+    public typealias PrologueColors = (odd: UIColor, even: UIColor)
+
     /// Style: Primary + Normal State
     ///
     public let primaryNormalBackgroundColor: UIColor
@@ -51,9 +53,13 @@ public struct WordPressAuthenticatorStyle {
     ///
     public let navBarImage: UIImage
 
+    /// Style: prologue background colors
+    ///
+    public let prologueBackgroundColors: PrologueColors
+
     /// Designated initializer
     ///
-    public init(primaryNormalBackgroundColor: UIColor, primaryNormalBorderColor: UIColor, primaryHighlightBackgroundColor: UIColor, primaryHighlightBorderColor: UIColor, secondaryNormalBackgroundColor: UIColor, secondaryNormalBorderColor: UIColor, secondaryHighlightBackgroundColor: UIColor, secondaryHighlightBorderColor: UIColor, disabledBackgroundColor: UIColor, disabledBorderColor: UIColor, primaryTitleColor: UIColor, secondaryTitleColor: UIColor, disabledTitleColor: UIColor, subheadlineColor: UIColor, viewControllerBackgroundColor: UIColor, navBarImage: UIImage) {
+    public init(primaryNormalBackgroundColor: UIColor, primaryNormalBorderColor: UIColor, primaryHighlightBackgroundColor: UIColor, primaryHighlightBorderColor: UIColor, secondaryNormalBackgroundColor: UIColor, secondaryNormalBorderColor: UIColor, secondaryHighlightBackgroundColor: UIColor, secondaryHighlightBorderColor: UIColor, disabledBackgroundColor: UIColor, disabledBorderColor: UIColor, primaryTitleColor: UIColor, secondaryTitleColor: UIColor, disabledTitleColor: UIColor, subheadlineColor: UIColor, viewControllerBackgroundColor: UIColor, navBarImage: UIImage, prologueBackgroundColors: PrologueColors? = nil) {
         self.primaryNormalBackgroundColor = primaryNormalBackgroundColor
         self.primaryNormalBorderColor = primaryNormalBorderColor
         self.primaryHighlightBackgroundColor = primaryHighlightBackgroundColor
@@ -70,6 +76,7 @@ public struct WordPressAuthenticatorStyle {
         self.subheadlineColor = subheadlineColor
         self.viewControllerBackgroundColor = viewControllerBackgroundColor
         self.navBarImage = navBarImage
+        self.prologueBackgroundColors = prologueBackgroundColors ?? (odd: WPStyleGuide.lightBlue(), even: WPStyleGuide.wordPressBlue())
     }
 }
 

WordPressAuthenticator/Signin/LoginNavigationController.swift

@@ -4,9 +4,4 @@ import WordPressUI
 
 
 public class LoginNavigationController: RotationAwareNavigationViewController {
-    override public func awakeFromNib() {
-        super.awakeFromNib()
-
-        navigationBar.barTintColor = WPStyleGuide.wordPressBlue()
-    }
 }

WordPressAuthenticator/Signin/LoginProloguePageViewController.swift

@@ -67,11 +67,12 @@ class LoginProloguePageViewController: UIPageViewController {
     fileprivate func backgroundColor(for index: Int) -> UIColor {
         switch index % 2 {
         case 0:
-            return WPStyleGuide.lightBlue()
+            // this uses the "odd" color because it is zero indexed
+            return WordPressAuthenticator.shared.style.prologueBackgroundColors.odd
         case 1:
             fallthrough
         default:
-            return WPStyleGuide.wordPressBlue()
+            return WordPressAuthenticator.shared.style.prologueBackgroundColors.even
         }
     }
 }