diff --git a/OneTimePasswordExample/Base.lproj/Main.storyboard b/OneTimePasswordExample/Base.lproj/Main.storyboard
index 32dd920..2a31f70 100644
--- a/OneTimePasswordExample/Base.lproj/Main.storyboard
+++ b/OneTimePasswordExample/Base.lproj/Main.storyboard
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="19162" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="19162" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="f40-Wb-LlR">
     <device id="retina6_1" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
@@ -61,7 +61,7 @@
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="2749.275362318841" y="78.348214285714278"/>
+            <point key="canvasLocation" x="3659.420289855073" y="78.348214285714278"/>
         </scene>
         <!--Setting Controller-->
         <scene sceneID="KmQ-w1-cif">
@@ -71,15 +71,6 @@
                         <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                         <color key="backgroundColor" systemColor="systemBackgroundColor"/>
-                        <button key="tableFooterView" opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" id="L2b-dO-OP0">
-                            <rect key="frame" x="0.0" y="110.5" width="414" height="44"/>
-                            <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                            <state key="normal" title="Button"/>
-                            <buttonConfiguration key="configuration" style="filled" title="戻る"/>
-                            <connections>
-                                <segue destination="BYZ-38-t0r" kind="show" identifier="settingSegue" id="ayo-nI-n3c"/>
-                            </connections>
-                        </button>
                         <prototypes>
                             <tableViewCell clipsSubviews="YES" contentMode="scaleToFill" preservesSuperviewLayoutMargins="YES" selectionStyle="default" indentationWidth="10" reuseIdentifier="SettingsTableViewCell" id="6DC-et-efa" customClass="SettingsTableViewCell">
                                 <rect key="frame" x="0.0" y="44.5" width="414" height="43.5"/>
@@ -134,6 +125,25 @@
             </objects>
             <point key="canvasLocation" x="2533.3333333333335" y="-595.3125"/>
         </scene>
+        <!--Navigation Controller-->
+        <scene sceneID="8Al-Ov-p6z">
+            <objects>
+                <navigationController automaticallyAdjustsScrollViewInsets="NO" id="f40-Wb-LlR" sceneMemberID="viewController">
+                    <toolbarItems/>
+                    <navigationItem key="navigationItem" id="pHv-Ws-YvZ"/>
+                    <navigationBar key="navigationBar" contentMode="scaleToFill" id="9wo-hp-Nqb">
+                        <rect key="frame" x="0.0" y="44" width="414" height="44"/>
+                        <autoresizingMask key="autoresizingMask"/>
+                    </navigationBar>
+                    <nil name="viewControllers"/>
+                    <connections>
+                        <segue destination="BYZ-38-t0r" kind="relationship" relationship="rootViewController" id="Zdp-fH-NRU"/>
+                    </connections>
+                </navigationController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="zlg-Io-1hV" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="2749.275362318841" y="78.348214285714278"/>
+        </scene>
     </scenes>
     <resources>
         <systemColor name="systemBackgroundColor">
diff --git a/OneTimePasswordExample/ViewController.m b/OneTimePasswordExample/ViewController.m
index 2e1fe88..3ee5d9c 100644
--- a/OneTimePasswordExample/ViewController.m
+++ b/OneTimePasswordExample/ViewController.m
@@ -25,7 +25,9 @@ @implementation ViewController
 
 - (void)viewDidLoad {
     [super viewDidLoad];
+}
 
+- (void)viewWillAppear:(BOOL)animated {
     [self initOneTimePasswordView];
 }