development: issue-592: fixed NavigationDrawerController regression, where…

development: issue-592: fixed NavigationDrawerController regression, where transitioning the rootViewController would go behind the contentViewController

Material.podspec

 Pod::Spec.new do |s|
   s.name = 'Material'
-  s.version = '2.3.6'
+  s.version = '2.3.7'
   s.license = 'BSD-3-Clause'
   s.summary = 'Material is an animation and graphics framework that is used to create beautiful applications.'
   s.homepage = 'http://materialswift.com'

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.3.6</string>
+	<string>2.3.7</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Sources/iOS/NavigationDrawerController.swift

@@ -415,18 +415,15 @@ open class NavigationDrawerController: RootController, UIGestureRecognizerDelega
 		prepare()
 	}
 	
-	/**
-     Prepares the view instance when intialized. When subclassing,
-     it is recommended to override the prepare method
-     to initialize property values and other setup operations.
-     The super.prepare method should always be called immediately
-     when subclassing.
-     */
-	open override func prepare() {
-		super.prepare()
-		prepareContentViewController()
-		prepareLeftView()
-		prepareRightView()
+    open override func transition(to viewController: UIViewController, duration: TimeInterval = 0.5, options: UIViewAnimationOptions = [], animations: (() -> Void)? = nil, completion: ((Bool) -> Void)? = nil) {
+        super.transition(to: viewController, duration: duration, options: options, animations: animations) { [weak self, completion = completion] (result) in
+            guard let s = self else {
+                return
+            }
+            
+            s.view.sendSubview(toBack: s.contentViewController.view)
+            completion?(result)
+        }
     }
     
 	/// Layout subviews.
@@ -471,6 +468,20 @@ open class NavigationDrawerController: RootController, UIGestureRecognizerDelega
 	}
     
     /**
+     Prepares the view instance when intialized. When subclassing,
+     it is recommended to override the prepare method
+     to initialize property values and other setup operations.
+     The super.prepare method should always be called immediately
+     when subclassing.
+     */
+    open override func prepare() {
+        super.prepare()
+        prepareContentViewController()
+        prepareLeftView()
+        prepareRightView()
+    }
+	
+	/**
      A method that is used to set the width of the leftView when
      opened. This is the recommended method of setting the leftView
      width.