fetches a given view controller type based on the return type of the property value

Material.xcodeproj/project.pbxproj

@@ -99,6 +99,7 @@
 		965E81211DD4D5C800D61E4B /* TextStorage.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96BCB79D1CB40DC500C806FE /* TextStorage.swift */; };
 		965E81221DD4D5C800D61E4B /* TextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96BCB79E1CB40DC500C806FE /* TextView.swift */; };
 		965E81261DD4D7C800D61E4B /* CharacterAttribute.swift in Sources */ = {isa = PBXBuildFile; fileRef = 961276621DCD8B1800A7D920 /* CharacterAttribute.swift */; };
+		9667A2491F33D5E200C45078 /* Material+UIViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9667A2481F33D5E200C45078 /* Material+UIViewController.swift */; };
 		966C17731F0439F600D3E83C /* Material+MotionAnimation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 966C17721F0439F600D3E83C /* Material+MotionAnimation.swift */; };
 		9685D5AF1F0F04CB00AFEB79 /* CardCollectionViewCell.swift in Headers */ = {isa = PBXBuildFile; fileRef = 9656895E1F002F16001C656D /* CardCollectionViewCell.swift */; settings = {ATTRIBUTES = (Public, ); }; };
 		9685D5B01F0F04CB00AFEB79 /* CardCollectionViewController.swift in Headers */ = {isa = PBXBuildFile; fileRef = 965689601F002F4C001C656D /* CardCollectionViewController.swift */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -229,6 +230,7 @@
 		9656895E1F002F16001C656D /* CardCollectionViewCell.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CardCollectionViewCell.swift; sourceTree = "<group>"; };
 		965689601F002F4C001C656D /* CardCollectionViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CardCollectionViewController.swift; sourceTree = "<group>"; };
 		9658F2161CD6FA4700B902C1 /* IconButton.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = IconButton.swift; sourceTree = "<group>"; };
+		9667A2481F33D5E200C45078 /* Material+UIViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Material+UIViewController.swift"; sourceTree = "<group>"; };
 		966C17721F0439F600D3E83C /* Material+MotionAnimation.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Material+MotionAnimation.swift"; sourceTree = "<group>"; };
 		966ECF291CF4C20100BB0BDF /* CollectionReusableView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CollectionReusableView.swift; sourceTree = "<group>"; };
 		967A48181D0F425A00B8CEB7 /* StatusBarController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StatusBarController.swift; sourceTree = "<group>"; };
@@ -784,6 +786,7 @@
 				96C1C8801D42C62800E6608F /* Material+Array.swift */,
 				962864591D53FE3E00690B69 /* Material+UIWindow.swift */,
 				966C17721F0439F600D3E83C /* Material+MotionAnimation.swift */,
+				9667A2481F33D5E200C45078 /* Material+UIViewController.swift */,
 			);
 			name = Extension;
 			sourceTree = "<group>";
@@ -1009,6 +1012,7 @@
 				965E81031DD4D5C800D61E4B /* CollectionView.swift in Sources */,
 				965E81041DD4D5C800D61E4B /* CollectionViewCell.swift in Sources */,
 				96A180941F2E2B6E006BD69D /* MotionCAAnimation.swift in Sources */,
+				9667A2491F33D5E200C45078 /* Material+UIViewController.swift in Sources */,
 				965E81071DD4D5C800D61E4B /* CollectionViewLayout.swift in Sources */,
 				96A180A41F2E2B6E006BD69D /* TransitionPreprocessor.swift in Sources */,
 				965E81081DD4D5C800D61E4B /* CollectionReusableView.swift in Sources */,

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.8.1</string>
+	<string>2.9.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Sources/iOS/FABMenuController.swift

@@ -43,14 +43,7 @@ extension UIViewController {
      through child UIViewControllers.
      */
     public var fabMenuController: FABMenuController? {
-        var viewController: UIViewController? = self
-        while nil != viewController {
-            if viewController is FABMenuController {
-                return viewController as? FABMenuController
-            }
-            viewController = viewController?.parent
-        }
-        return nil
+        return findViewControllerType()
     }
 }
 

Sources/iOS/Material+UIViewController.swift

+/*
+ * Copyright (C) 2015 - 2017, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *	*	Redistributions of source code must retain the above copyright notice, this
+ *		list of conditions and the following disclaimer.
+ *
+ *	*	Redistributions in binary form must reproduce the above copyright notice,
+ *		this list of conditions and the following disclaimer in the documentation
+ *		and/or other materials provided with the distribution.
+ *
+ *	*	Neither the name of CosmicMind nor the names of its
+ *		contributors may be used to endorse or promote products derived from
+ *		this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import UIKit
+
+internal extension UIViewController {
+    /**
+     Finds a view controller with a given type based on
+     the view controller subclass.
+     - Returns: An optional of type T.
+     */
+    func findViewControllerType<T: UIViewController>() -> T? {
+        var v: UIViewController? = self
+        while nil != v {
+            if v is T {
+                return v as? T
+            }
+            v = v?.parent
+        }
+        return nil
+    }
+}

Sources/iOS/NavigationDrawerController.swift

@@ -38,19 +38,12 @@ public enum NavigationDrawerPosition: Int {
 
 extension UIViewController {
 	/**
-	A convenience property that provides access to the NavigationDrawerController. 
-	This is the recommended method of accessing the NavigationDrawerController
-	through child UIViewControllers.
-	*/
+     A convenience property that provides access to the NavigationDrawerController.
+     This is the recommended method of accessing the NavigationDrawerController
+     through child UIViewControllers.
+     */
 	public var navigationDrawerController: NavigationDrawerController? {
-		var viewController: UIViewController? = self
-		while nil != viewController {
-			if viewController is NavigationDrawerController {
-				return viewController as? NavigationDrawerController
-			}
-			viewController = viewController?.parent
-		}
-		return nil
+		return findViewControllerType()
 	}
 }
 

Sources/iOS/SearchBarController.swift

@@ -30,22 +30,15 @@
 
 import UIKit
 
-extension UIViewController {
-	/**
+public extension UIViewController {
+    /**
      A convenience property that provides access to the SearchBarController.
      This is the recommended method of accessing the SearchBarController
      through child UIViewControllers.
      */
-	public var searchBarController: SearchBarController? {
-		var viewController: UIViewController? = self
-		while nil != viewController {
-			if viewController is SearchBarController {
-				return viewController as? SearchBarController
-			}
-			viewController = viewController?.parent
-		}
-		return nil
-	}
+    var searchBarController: SearchBarController? {
+        return findViewControllerType()
+    }
 }
 
 open class SearchBarController: StatusBarController {

Sources/iOS/SnackbarController.swift

@@ -78,14 +78,7 @@ extension UIViewController {
      through child UIViewControllers.
      */
     public var snackbarController: SnackbarController? {
-        var viewController: UIViewController? = self
-        while nil != viewController {
-            if viewController is SnackbarController {
-                return viewController as? SnackbarController
-            }
-            viewController = viewController?.parent
-        }
-        return nil
+        return findViewControllerType()
     }
 }
 

Sources/iOS/StatusBarController.swift

@@ -37,14 +37,7 @@ extension UIViewController {
      through child UIViewControllers.
      */
 	public var statusBarController: StatusBarController? {
-		var viewController: UIViewController? = self
-		while nil != viewController {
-			if viewController is StatusBarController {
-				return viewController as? StatusBarController
-			}
-			viewController = viewController?.parent
-		}
-		return nil
+		return findViewControllerType()
 	}
 }
 

Sources/iOS/TabsController.swift

@@ -60,14 +60,7 @@ extension UIViewController {
      through child UIViewControllers.
      */
     public var tabsController: TabsController? {
-        var viewController: UIViewController? = self
-        while nil != viewController {
-            if viewController is TabsController {
-                return viewController as? TabsController
-            }
-            viewController = viewController?.parent
-        }
-        return nil
+        return findViewControllerType()
     }
 }
 

Sources/iOS/ToolbarController.swift

@@ -30,22 +30,15 @@
 
 import UIKit
 
-extension UIViewController {
-	/**
+public extension UIViewController {
+    /**
      A convenience property that provides access to the ToolbarController.
      This is the recommended method of accessing the ToolbarController
      through child UIViewControllers.
      */
-	public var toolbarController: ToolbarController? {
-		var viewController: UIViewController? = self
-		while nil != viewController {
-			if viewController is ToolbarController {
-				return viewController as? ToolbarController
-			}
-			viewController = viewController?.parent
-		}
-		return nil
-	}
+    var toolbarController: ToolbarController? {
+        return findViewControllerType()
+    }
 }
 
 @objc(ToolbarController)