diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..da63089
Binary files /dev/null and b/.DS_Store differ
diff --git a/Example/Use Code/.DS_Store b/Example/Use Code/.DS_Store
new file mode 100644
index 0000000..2f9b51e
Binary files /dev/null and b/Example/Use Code/.DS_Store differ
diff --git a/PageController/MenuItem.swift b/PageController/MenuItem.swift
index 4c6a526..320a703 100644
--- a/PageController/MenuItem.swift
+++ b/PageController/MenuItem.swift
@@ -79,7 +79,8 @@ class MenuItem: UILabel {
     private func setup() {
         textAlignment = NSTextAlignment.Center
         userInteractionEnabled = true
-        backgroundColor = UIColor.clearColor()
+//        backgroundColor = UIColor.clearColor()
+        backgroundColor = .redColor()
     }
     
     override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
diff --git a/PageController/MenuView.swift b/PageController/MenuView.swift
index f6ea2db..f1d0708 100644
--- a/PageController/MenuView.swift
+++ b/PageController/MenuView.swift
@@ -29,12 +29,15 @@ public class MenuView: UIView, MenuItemDelegate {
     override public var frame: CGRect {
         didSet {
             guard contentView != nil else { return }
+// FIXME: - reset contentView's x will cause a bug that contentView won't start from x: 0, remove them and works!
+//            /**
             // Make the contentView center, because system will change menuView's frame if it's a titleView.
             if (contentView.frame.origin.x + contentView.frame.width / 2) != (bounds.origin.x + bounds.width / 2) {
                 var contentFrame = contentView.frame
                 contentFrame.origin.x = bounds.origin.x - (contentFrame.width - bounds.width) / 2
                 contentView.frame = contentFrame
             }
+//            */
         }
     }
     public var leftView: UIView? {
diff --git a/StoryboardExample/.DS_Store b/StoryboardExample/.DS_Store
new file mode 100644
index 0000000..14e8bf6
Binary files /dev/null and b/StoryboardExample/.DS_Store differ
diff --git a/StoryboardExample/StoryboardExample/Base.lproj/Main.storyboard b/StoryboardExample/StoryboardExample/Base.lproj/Main.storyboard
index 1202ad4..02f2822 100644
--- a/StoryboardExample/StoryboardExample/Base.lproj/Main.storyboard
+++ b/StoryboardExample/StoryboardExample/Base.lproj/Main.storyboard
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10116" systemVersion="15E65" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="riQ-5R-hbg">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="riQ-5R-hbg">
     <dependencies>
         <deployment identifier="iOS"/>
         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
@@ -82,6 +82,7 @@
                     <navigationBar key="navigationBar" contentMode="scaleToFill" id="d7C-nr-Dxn">
                         <rect key="frame" x="0.0" y="0.0" width="320" height="44"/>
                         <autoresizingMask key="autoresizingMask"/>
+                        <color key="backgroundColor" red="1" green="0.24210885069999999" blue="1" alpha="1" colorSpace="calibratedRGB"/>
                     </navigationBar>
                     <nil name="viewControllers"/>
                     <connections>
diff --git a/StoryboardExample/StoryboardExample/ParentController/CustomPageController.swift b/StoryboardExample/StoryboardExample/ParentController/CustomPageController.swift
index 5cc8fc2..a646308 100644
--- a/StoryboardExample/StoryboardExample/ParentController/CustomPageController.swift
+++ b/StoryboardExample/StoryboardExample/ParentController/CustomPageController.swift
@@ -18,15 +18,16 @@ class CustomPageController: PageController {
         delegate = self
         preloadPolicy = PreloadPolicy.Neighbour
         menuViewContentMargin = 10
+        showOnNavigationBar = true
     }
     
     override func viewDidLoad() {
         super.viewDidLoad()
         
         // Do any additional setup after loading the view.
-        menuView?.leftView = customButtonWithTitle("Left")
-        menuView?.rightView = customButtonWithTitle("Right")
-        
+//        menuView?.leftView = customButtonWithTitle("Left")
+        menuView?.rightView = customButtonWithTitle("+")
+        menuView?.backgroundColor = .yellowColor()
         let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(5.0 * Double(NSEC_PER_SEC)))
         dispatch_after(delayTime, dispatch_get_main_queue()) {
             self.vcTitles = ["Test", "Test", "Test", "Test", "Test", "Test"]