ios: choose accent color (#956)

apps/ios/Shared/AppDelegate.swift

@@ -80,6 +80,16 @@ class AppDelegate: NSObject, UIApplicationDelegate {
         terminateChat()
     }
 
+    func application(_ application: UIApplication,
+                     configurationForConnecting connectingSceneSession: UISceneSession,
+                     options: UIScene.ConnectionOptions) -> UISceneConfiguration {
+        let configuration = UISceneConfiguration(name: nil, sessionRole: connectingSceneSession.role)
+        if connectingSceneSession.role == .windowApplication {
+            configuration.delegateClass = SceneDelegate.self
+        }
+        return configuration
+    }
+
     private func receiveMessages(_ completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
         let complete = BGManager.shared.completionHandler {
             logger.debug("AppDelegate: completed BGManager.receiveMessages")
@@ -89,3 +99,13 @@ class AppDelegate: NSObject, UIApplicationDelegate {
         BGManager.shared.receiveMessages(complete)
     }
 }
+
+class SceneDelegate: NSObject, ObservableObject, UIWindowSceneDelegate {
+    var window: UIWindow?
+
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
+        guard let windowScene = scene as? UIWindowScene else { return }
+        window = windowScene.keyWindow
+        window?.tintColor = UIColor(cgColor: getUIAccentColorDefault())
+    }
+}

apps/ios/Shared/Views/UserSettings/AppearanceSettings.swift

@@ -8,9 +8,13 @@
 
 import SwiftUI
 
+let defaultAccentColor = CGColor.init(red: 0, green: 0.533, blue: 1, alpha: 1)
+
 struct AppearanceSettings: View {
+    @EnvironmentObject var sceneDelegate: SceneDelegate
     @State private var iconLightTapped = false
     @State private var iconDarkTapped = false
+    @State private var uiTintColor = getUIAccentColorDefault()
 
     var body: some View {
         VStack{
@@ -22,6 +26,23 @@ struct AppearanceSettings: View {
                         updateAppIcon(image: "icon-dark", icon: "DarkAppIcon", tapped: $iconDarkTapped)
                     }
                 }
+
+                Section {
+                    ColorPicker("Accent color", selection: $uiTintColor, supportsOpacity: false)
+                } header: {
+                    Text("Colors")
+                } footer: {
+                    Button {
+                        uiTintColor = defaultAccentColor
+                        setUIAccentColorDefault(defaultAccentColor)
+                    } label: {
+                        Text("Reset colors").font(.callout)
+                    }
+                }
+                .onChange(of: uiTintColor) { _ in
+                    sceneDelegate.window?.tintColor = UIColor(cgColor: uiTintColor)
+                    setUIAccentColorDefault(uiTintColor)
+                }
             }
         }
     }
@@ -44,6 +65,25 @@ struct AppearanceSettings: View {
     }
 }
 
+func getUIAccentColorDefault() -> CGColor {
+    let defs = UserDefaults.standard
+    return CGColor(
+        red: defs.double(forKey: DEFAULT_ACCENT_COLOR_RED),
+        green: defs.double(forKey: DEFAULT_ACCENT_COLOR_GREEN),
+        blue: defs.double(forKey: DEFAULT_ACCENT_COLOR_BLUE),
+        alpha: 1
+    )
+}
+
+func setUIAccentColorDefault(_ color: CGColor) {
+    if let cs = color.components {
+        let defs = UserDefaults.standard
+        defs.set(cs[0], forKey: DEFAULT_ACCENT_COLOR_RED)
+        defs.set(cs[1], forKey: DEFAULT_ACCENT_COLOR_GREEN)
+        defs.set(cs[2], forKey: DEFAULT_ACCENT_COLOR_BLUE)
+    }
+}
+
 struct AppearanceSettings_Previews: PreviewProvider {
     static var previews: some View {
         AppearanceSettings()

apps/ios/Shared/Views/UserSettings/SettingsView.swift

@@ -26,6 +26,9 @@ let DEFAULT_CHAT_ARCHIVE_NAME = "chatArchiveName"
 let DEFAULT_CHAT_ARCHIVE_TIME = "chatArchiveTime"
 let DEFAULT_CHAT_V3_DB_MIGRATION = "chatV3DBMigration"
 let DEFAULT_DEVELOPER_TOOLS = "developerTools"
+let DEFAULT_ACCENT_COLOR_RED = "accentColorRed"
+let DEFAULT_ACCENT_COLOR_GREEN = "accentColorGreen"
+let DEFAULT_ACCENT_COLOR_BLUE = "accentColorBlue"
 
 let appDefaults: [String: Any] = [
     DEFAULT_SHOW_LA_NOTICE: false,
@@ -36,7 +39,10 @@ let appDefaults: [String: Any] = [
     DEFAULT_PRIVACY_LINK_PREVIEWS: true,
     DEFAULT_EXPERIMENTAL_CALLS: false,
     DEFAULT_CHAT_V3_DB_MIGRATION: "offer",
-    DEFAULT_DEVELOPER_TOOLS: false
+    DEFAULT_DEVELOPER_TOOLS: false,
+    DEFAULT_ACCENT_COLOR_RED: 0.000,
+    DEFAULT_ACCENT_COLOR_GREEN: 0.533,
+    DEFAULT_ACCENT_COLOR_BLUE: 1.000
 ]
 
 private var indent: CGFloat = 36