Fix uidemo error and refactoring codes about UIStoryboard

samples/swift/uidemo.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		574F1B131D8106D2001924BB /* UIStoryboardExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 574F1B121D8106D2001924BB /* UIStoryboardExtension.swift */; };
 		8D16073E1D492B200069E4F5 /* AuthViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8D16073D1D492B200069E4F5 /* AuthViewController.swift */; };
 		8DABC9891D3D82D600453807 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8DABC9881D3D82D600453807 /* AppDelegate.swift */; };
 		8DABC98B1D3D82D600453807 /* MenuViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8DABC98A1D3D82D600453807 /* MenuViewController.swift */; };
@@ -31,6 +32,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		574F1B121D8106D2001924BB /* UIStoryboardExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UIStoryboardExtension.swift; sourceTree = "<group>"; };
 		8D16073D1D492B200069E4F5 /* AuthViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AuthViewController.swift; sourceTree = "<group>"; };
 		8DABC9851D3D82D600453807 /* uidemo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = uidemo.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		8DABC9881D3D82D600453807 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@@ -100,6 +102,7 @@
 				8DABC98A1D3D82D600453807 /* MenuViewController.swift */,
 				8DABC9AA1D3D947300453807 /* SampleCell.swift */,
 				8DABC9A81D3D872C00453807 /* Sample.swift */,
+				574F1B121D8106D2001924BB /* UIStoryboardExtension.swift */,
 				8DD17C951D4BCC6500E850E4 /* AuthSample */,
 				8D643F0F1D4827F10081F979 /* ChatSample */,
 				8DABC98C1D3D82D600453807 /* Main.storyboard */,
@@ -329,6 +332,7 @@
 			files = (
 				8DABC98B1D3D82D600453807 /* MenuViewController.swift in Sources */,
 				8DABC9AB1D3D947300453807 /* SampleCell.swift in Sources */,
+				574F1B131D8106D2001924BB /* UIStoryboardExtension.swift in Sources */,
 				8DABC9A91D3D872C00453807 /* Sample.swift in Sources */,
 				8D16073E1D492B200069E4F5 /* AuthViewController.swift in Sources */,
 				8DABC9AD1D3D9EAF00453807 /* ChatViewController.swift in Sources */,

samples/swift/uidemo/AppDelegate.swift

@@ -16,14 +16,10 @@
 
 import UIKit
 import Firebase
-import FirebaseAuthUI.FIRAuthUI
+import FirebaseAuthUI
 
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
-
-  static var mainStoryboard: UIStoryboard {
-    return UIStoryboard(name: "Main", bundle: nil)
-  }
 
   var window: UIWindow?
 

samples/swift/uidemo/AuthViewController.swift

@@ -118,8 +118,5 @@ class AuthViewController: UIViewController {
   override func viewWillLayoutSubviews() {
     self.topConstraint.constant = self.topLayoutGuide.length
   }
-
-  static func fromStoryboard(storyboard: UIStoryboard = AppDelegate.mainStoryboard) -> AuthViewController {
-    return storyboard.instantiateViewControllerWithIdentifier("AuthViewController") as! AuthViewController
-  }
+
 }

samples/swift/uidemo/ChatViewController.swift

@@ -128,13 +128,7 @@ class ChatViewController: UIViewController, UICollectionViewDelegateFlowLayout {
 
     self.textView.text = ""
   }
-
-  // MARK: - Boilerplate
-
-  static func fromStoryboard(storyboard: UIStoryboard = AppDelegate.mainStoryboard) -> ChatViewController {
-    return storyboard.instantiateViewControllerWithIdentifier("ChatViewController") as! ChatViewController
-  }
-
+
   override func viewDidLoad() {
     super.viewDidLoad()
 

samples/swift/uidemo/Sample.swift

@@ -52,9 +52,9 @@ enum Sample: Int, RawRepresentable {
   func controller() -> UIViewController {
     switch self {
     case .Chat:
-      return ChatViewController.fromStoryboard()
+      return UIStoryboard.instantiateViewController("Main", identifier: "ChatViewController") as! ChatViewController
     case .Auth:
-      return AuthViewController.fromStoryboard()
+      return UIStoryboard.instantiateViewController("Main", identifier: "AuthViewController") as! AuthViewController
     }
   }
 }

samples/swift/uidemo/UIStoryboardExtension.swift

@@ -0,0 +1,23 @@
+//
+//  Copyright (c) 2016 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+
+import UIKit
+
+extension UIStoryboard {
+  static func instantiateViewController(storyboard: String, identifier: String) -> UIViewController {
+    return UIStoryboard(name: storyboard, bundle: nil).instantiateViewControllerWithIdentifier(identifier)
+  }
+}