Use ThemeManager.shared

README.md

@@ -70,7 +70,7 @@ let unicornTheme = MyTheme(json)
 When app launches, you need to declare 1 theme as the current, it can be loaded from cache
 
 ```swift
-ThemeManager.currentTheme = dayTheme
+ThemeManager.shared.currentTheme = dayTheme
 ```
 
 ### Step 3: React to theme change
@@ -112,7 +112,7 @@ override func awakeFromNib() {
 Change the current theme is as easy as assigning a new theme. All happens in real time and very fast
 
 ```swift
-ThemeManager.currentTheme = nightTheme
+ThemeManager.shared.currentTheme = nightTheme
 ```
 
 ## Installation

Sources/Handler.swift

@@ -14,7 +14,7 @@ class Handler {
   func observe() {
     observer = NotificationCenter.default.addObserver(
       forName: Notification.Name.themeDidChange,
-      object: ThemeManager.self,
+      object: ThemeManager.shared,
       queue: OperationQueue.main,
       using: { [weak self] _ in
         self?.handle()
@@ -26,7 +26,7 @@ class Handler {
       return
     }
 
-    guard let theme = ThemeManager.currentTheme else {
+    guard let theme = ThemeManager.shared.currentTheme else {
       return
     }
 

Sources/ThemeManager.swift

@@ -4,9 +4,12 @@ import Foundation
 /// Manager your current theme
 public class ThemeManager {
 
+  /// The singleton
+  public static let shared = ThemeManager()
+
   /// This is the current theme. Set it at app launch and whenever you want 
   /// to change theme
-  public static var currentTheme: Theme? {
+  public var currentTheme: Theme? {
     didSet {
       NotificationCenter.default.post(name: Notification.Name.themeDidChange, object: self)
     }

Sources/ThemeUser.swift

@@ -20,7 +20,7 @@ public extension ThemeUser {
   ///   - type: The type of your own theme
   ///   - apply: the function that gets called with (ThemeUser, Theme)
   func use<T: Theme>(_ type: T.Type, apply: @escaping (Self, T) -> Void) {
-    if let theme = ThemeManager.currentTheme as? T {
+    if let theme = ThemeManager.shared.currentTheme as? T {
       apply(self, theme)
     }
 

ThemesTests/ThemeTests.swift

@@ -23,7 +23,7 @@ class ThemeTests: XCTestCase {
     let theme2 = MyTheme(color: .green, font: .systemFont(ofSize: 10), placeholder: "theme 2")
 
     // theme 1
-    ThemeManager.currentTheme = theme1
+    ThemeManager.shared.currentTheme = theme1
 
     let textField = UITextField()
 
@@ -39,7 +39,7 @@ class ThemeTests: XCTestCase {
     XCTAssertEqual(textField.placeholder, "theme 1")
 
     // theme 2
-    ThemeManager.currentTheme = theme2
+    ThemeManager.shared.currentTheme = theme2
 
     // change to theme 2
     XCTAssertEqual(textField.textColor, UIColor.green)
@@ -48,7 +48,7 @@ class ThemeTests: XCTestCase {
 
     // other theme
 
-    ThemeManager.currentTheme = OtherTheme()
+    ThemeManager.shared.currentTheme = OtherTheme()
 
     // textField is unchanged
     XCTAssertEqual(textField.textColor, UIColor.green)