diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
index a6fa2b9..193d0dc 100644
--- a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -1,224 +1,158 @@
 {
-  "images" : [
-    {
-      "filename" : "icon-20@2x-ipad.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "20x20"
-    },
-    {
-      "filename" : "icon-20@3x.png",
-      "idiom" : "iphone",
-      "scale" : "3x",
-      "size" : "20x20"
-    },
-    {
-      "filename" : "icon-29-ipad.png",
-      "idiom" : "iphone",
-      "scale" : "1x",
-      "size" : "29x29"
-    },
-    {
-      "filename" : "icon-29@2x-ipad.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "29x29"
-    },
-    {
-      "filename" : "icon-29@3x.png",
-      "idiom" : "iphone",
-      "scale" : "3x",
-      "size" : "29x29"
-    },
-    {
-      "filename" : "icon-40@2x.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "40x40"
-    },
-    {
-      "filename" : "icon-40@3x.png",
-      "idiom" : "iphone",
-      "scale" : "3x",
-      "size" : "40x40"
-    },
-    {
-      "filename" : "icon-57.png",
-      "idiom" : "iphone",
-      "scale" : "1x",
-      "size" : "57x57"
-    },
-    {
-      "filename" : "icon-57@2x.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "57x57"
-    },
-    {
-      "filename" : "icon-60@2x.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "60x60"
-    },
-    {
-      "filename" : "icon-60@3x.png",
-      "idiom" : "iphone",
-      "scale" : "3x",
-      "size" : "60x60"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "1x",
-      "size" : "20x20"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "2x",
-      "size" : "20x20"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "1x",
-      "size" : "29x29"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "2x",
-      "size" : "29x29"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "1x",
-      "size" : "40x40"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "2x",
-      "size" : "40x40"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "1x",
-      "size" : "76x76"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "2x",
-      "size" : "76x76"
-    },
-    {
-      "idiom" : "ipad",
-      "scale" : "2x",
-      "size" : "83.5x83.5"
-    },
-    {
-      "filename" : "icon-1024.png",
-      "idiom" : "ios-marketing",
-      "scale" : "1x",
-      "size" : "1024x1024"
-    },
-    {
-      "filename" : "icon-20-ipad.png",
-      "idiom" : "universal",
-      "scale" : "1x",
-      "size" : "20x20"
-    },
-    {
-      "filename" : "icon-38@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "38x38"
-    },
-    {
-      "filename" : "icon-40.png",
-      "idiom" : "universal",
-      "scale" : "1x",
-      "size" : "40x40"
-    },
-    {
-      "filename" : "icon-50.png",
-      "idiom" : "universal",
-      "scale" : "1x",
-      "size" : "50x50"
-    },
-    {
-      "filename" : "icon-50@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "50x50"
-    },
-    {
-      "filename" : "icon-64@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "64x64"
-    },
-    {
-      "filename" : "icon-64@3x.png",
-      "idiom" : "universal",
-      "scale" : "3x",
-      "size" : "64x64"
-    },
-    {
-      "filename" : "icon-68@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "68x68"
-    },
-    {
-      "filename" : "icon-72.png",
-      "idiom" : "universal",
-      "scale" : "1x",
-      "size" : "72x72"
-    },
-    {
-      "filename" : "icon-72@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "72x72"
-    },
-    {
-      "filename" : "icon-76.png",
-      "idiom" : "universal",
-      "scale" : "1x",
-      "size" : "76x76"
-    },
-    {
-      "filename" : "icon-76@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "76x76"
-    },
-    {
-      "filename" : "icon-83.5@2x.png",
-      "idiom" : "universal",
-      "scale" : "2x",
-      "size" : "83.5x83.5"
-    },
-    {
-      "filename" : "icon-20@2x 1.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "20x20",
-      "unassigned" : true
-    },
-    {
-      "filename" : "icon-29.png",
-      "idiom" : "iphone",
-      "scale" : "1x",
-      "size" : "29x29",
-      "unassigned" : true
-    },
-    {
-      "filename" : "icon-29@2x 1.png",
-      "idiom" : "iphone",
-      "scale" : "2x",
-      "size" : "29x29",
-      "unassigned" : true
+    "images": [
+        {
+            "size": "20x20",
+            "idiom": "iphone",
+            "filename": "icon-20@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "20x20",
+            "idiom": "iphone",
+            "filename": "icon-20@3x.png",
+            "scale": "3x"
+        },
+        {
+            "size": "29x29",
+            "idiom": "iphone",
+            "filename": "icon-29.png",
+            "scale": "1x"
+        },
+        {
+            "size": "29x29",
+            "idiom": "iphone",
+            "filename": "icon-29@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "29x29",
+            "idiom": "iphone",
+            "filename": "icon-29@3x.png",
+            "scale": "3x"
+        },
+        {
+            "size": "40x40",
+            "idiom": "iphone",
+            "filename": "icon-40@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "40x40",
+            "idiom": "iphone",
+            "filename": "icon-40@3x.png",
+            "scale": "3x"
+        },
+        {
+            "size": "57x57",
+            "idiom": "iphone",
+            "filename": "icon-57.png",
+            "scale": "1x"
+        },
+        {
+            "size": "57x57",
+            "idiom": "iphone",
+            "filename": "icon-57@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "60x60",
+            "idiom": "iphone",
+            "filename": "icon-60@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "60x60",
+            "idiom": "iphone",
+            "filename": "icon-60@3x.png",
+            "scale": "3x"
+        },
+        {
+            "size": "20x20",
+            "idiom": "ipad",
+            "filename": "icon-20-ipad.png",
+            "scale": "1x"
+        },
+        {
+            "size": "20x20",
+            "idiom": "ipad",
+            "filename": "icon-20@2x-ipad.png",
+            "scale": "2x"
+        },
+        {
+            "size": "29x29",
+            "idiom": "ipad",
+            "filename": "icon-29-ipad.png",
+            "scale": "1x"
+        },
+        {
+            "size": "29x29",
+            "idiom": "ipad",
+            "filename": "icon-29@2x-ipad.png",
+            "scale": "2x"
+        },
+        {
+            "size": "40x40",
+            "idiom": "ipad",
+            "filename": "icon-40.png",
+            "scale": "1x"
+        },
+        {
+            "size": "40x40",
+            "idiom": "ipad",
+            "filename": "icon-40@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "50x50",
+            "idiom": "ipad",
+            "filename": "icon-50.png",
+            "scale": "1x"
+        },
+        {
+            "size": "50x50",
+            "idiom": "ipad",
+            "filename": "icon-50@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "72x72",
+            "idiom": "ipad",
+            "filename": "icon-72.png",
+            "scale": "1x"
+        },
+        {
+            "size": "72x72",
+            "idiom": "ipad",
+            "filename": "icon-72@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "76x76",
+            "idiom": "ipad",
+            "filename": "icon-76.png",
+            "scale": "1x"
+        },
+        {
+            "size": "76x76",
+            "idiom": "ipad",
+            "filename": "icon-76@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "83.5x83.5",
+            "idiom": "ipad",
+            "filename": "icon-83.5@2x.png",
+            "scale": "2x"
+        },
+        {
+            "size": "1024x1024",
+            "idiom": "ios-marketing",
+            "filename": "icon-1024.png",
+            "scale": "1x"
+        }
+    ],
+    "info": {
+        "version": 1,
+        "author": "icon.wuruihong.com"
     }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
+}
\ No newline at end of file
diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-20@2x 1.png b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-20@2x.png
similarity index 100%
rename from making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-20@2x 1.png
rename to making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-20@2x.png
diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-29@2x 1.png b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-29@2x.png
similarity index 100%
rename from making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-29@2x 1.png
rename to making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-29@2x.png
diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-38@2x.png b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-38@2x.png
deleted file mode 100644
index 096aa85..0000000
Binary files a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-38@2x.png and /dev/null differ
diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-64@2x.png b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-64@2x.png
deleted file mode 100644
index b0e7871..0000000
Binary files a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-64@2x.png and /dev/null differ
diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-64@3x.png b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-64@3x.png
deleted file mode 100644
index 4d2df11..0000000
Binary files a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-64@3x.png and /dev/null differ
diff --git a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-68@2x.png b/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-68@2x.png
deleted file mode 100644
index 649835d..0000000
Binary files a/making_school_asignment_app/ios/Runner/Assets.xcassets/AppIcon.appiconset/icon-68@2x.png and /dev/null differ
diff --git a/making_school_asignment_app/ios/Runner/Base.lproj/LaunchScreen.storyboard b/making_school_asignment_app/ios/Runner/Base.lproj/LaunchScreen.storyboard
index 280d86f..b9e7b32 100644
--- a/making_school_asignment_app/ios/Runner/Base.lproj/LaunchScreen.storyboard
+++ b/making_school_asignment_app/ios/Runner/Base.lproj/LaunchScreen.storyboard
@@ -1,8 +1,10 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="23504" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <device id="retina6_12" orientation="portrait" appearance="light"/>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="23506"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
@@ -14,10 +16,15 @@
                         <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
                     </layoutGuides>
                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" image="LaunchBackground" translatesAutoresizingMaskIntoConstraints="NO" id="tWc-Dq-wcI"/>
-                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4"></imageView>
+                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" image="LaunchBackground" translatesAutoresizingMaskIntoConstraints="NO" id="tWc-Dq-wcI">
+                                <rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
+                            </imageView>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleAspectFill" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                                <rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
+                            </imageView>
                         </subviews>
                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <constraints>
@@ -34,11 +41,11 @@
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="53" y="375"/>
+            <point key="canvasLocation" x="80.916030534351137" y="264.08450704225356"/>
         </scene>
     </scenes>
     <resources>
-        <image name="LaunchImage" width="751" height="1734"/>
         <image name="LaunchBackground" width="1" height="1"/>
+        <image name="LaunchImage" width="187.66667175292969" height="433.33334350585938"/>
     </resources>
 </document>