add swift demo sample for Twitter Provider

Author: yramanchuk

samples/swift/uidemo/AppDelegate.swift

@@ -17,6 +17,8 @@
 import UIKit
 import Firebase
 import FirebaseAuthUI
+import Fabric
+import TwitterKit
 
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
@@ -27,6 +29,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     // Successfully running this sample requires an app in Firebase and an
     // accompanying valid GoogleService-Info.plist file.
     FIRApp.configure()
+    Fabric.with([Twitter.self])
     return true
   }
 

samples/swift/uidemo/AuthViewController.swift

@@ -19,6 +19,7 @@ import Firebase
 import FirebaseAuthUI
 import FirebaseGoogleAuthUI
 import FirebaseFacebookAuthUI
+import FirebaseTwitterAuthUI
 
 let kFirebaseTermsOfService = NSURL(string: "https://firebase.google.com/terms/")!
 
@@ -62,6 +63,7 @@ class AuthViewController: UIViewController {
     let providers: [FIRAuthProviderUI] = [
       FIRGoogleAuthUI(clientID: kGoogleAppClientID),
       FIRFacebookAuthUI(appID: kFacebookAppID),
+      FIRTwitterAuthUI(),
     ]
     self.authUI?.providers = providers
 

samples/swift/uidemo/Info.plist

@@ -2,13 +2,6 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>LSApplicationQueriesSchemes</key>
-	<array>
-		<string>fbapi</string>
-		<string>fb-messenger-api</string>
-		<string>fbauth2</string>
-		<string>fbshareextension</string>
-	</array>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleExecutable</key>
@@ -30,22 +23,62 @@
 		<dict>
 			<key>CFBundleTypeRole</key>
 			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>REVERSED_CLIENT_ID</string>
 			<key>CFBundleURLSchemes</key>
 			<array>
-				<string>REVERSED_CLIENT_ID</string>
+				<string>REPLACE_ME_WITH_REVERSED_CLIENT_ID</string>
 			</array>
 		</dict>
 		<dict>
 			<key>CFBundleTypeRole</key>
 			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>FACEBOOK_APP_ID</string>
 			<key>CFBundleURLSchemes</key>
 			<array>
-				<string>FACEBOOK_APP_ID</string>
+				<string>REPLACE_ME_WITH_FACEBOOK_APP_ID</string>
+			</array>
+		</dict>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>TWITTER_CONSUMER_KEY</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>twitterkit-&lt;consumer_key&gt;</string>
 			</array>
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
 	<string>1</string>
+  <key>Fabric</key>
+  <dict>
+    <key>APIKey</key>
+    <string>FABRIC_API_KEY</string>
+    <key>Kits</key>
+    <array>
+      <dict>
+        <key>KitInfo</key>
+        <dict>
+          <key>consumerKey</key>
+          <string>Consumer Key</string>
+          <key>consumerSecret</key>
+          <string>Consumer Secret</string>
+        </dict>
+        <key>KitName</key>
+        <string>Twitter</string>
+      </dict>
+    </array>
+  </dict>
+	<key>LSApplicationQueriesSchemes</key>
+	<array>
+		<string>fbapi</string>
+		<string>fb-messenger-api</string>
+		<string>fbauth2</string>
+		<string>fbshareextension</string>
+	</array>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>UILaunchStoryboardName</key>

samples/swift/uidemo/Sample.swift

@@ -23,9 +23,9 @@ enum Sample: Int, RawRepresentable {
 
   // When adding new samples, add a new value here and fill
   // out the switch statements below as necessary.
-  case Chat = 0
-  case Auth = 1
-  
+  case Auth = 0
+  case Chat = 1
+
   static var total: Int {
     var count = 0
     while let _ = Sample(rawValue: count) {