1.创建RA Image启动界面。

RA Image/RA Image/Assets.xcassets/redAnt.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "redAnt.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "redAnt@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "redAnt@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

RA Image/RA Image/Base.lproj/LaunchScreen.storyboard

@@ -1,7 +1,11 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11134" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="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="12120" systemVersion="16A323" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11106"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12088"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -16,12 +20,28 @@
                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="redAnt" translatesAutoresizingMaskIntoConstraints="NO" id="haL-GR-fcA">
+                                <rect key="frame" x="67.5" y="213.5" width="240" height="240"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="240" id="DiP-oe-js5"/>
+                                    <constraint firstAttribute="width" constant="240" id="YpT-k5-G4V"/>
+                                </constraints>
+                            </imageView>
+                        </subviews>
                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="haL-GR-fcA" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="UEx-xi-rfj"/>
+                            <constraint firstItem="haL-GR-fcA" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="b5k-lo-NLG"/>
+                        </constraints>
                     </view>
                 </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="49.925037481259373" y="373.60000000000002"/>
         </scene>
     </scenes>
+    <resources>
+        <image name="redAnt" width="1024" height="1024"/>
+    </resources>
 </document>

RA Image/RA Image/Base.lproj/Main.storyboard

@@ -303,7 +303,7 @@
                                 <nil key="highlightedColor"/>
                             </label>
                         </subviews>
-                        <color key="backgroundColor" red="0.10180238736934404" green="0.98262900114059448" blue="0.67473328857458892" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <color key="backgroundColor" red="0.0" green="0.47843137250000001" blue="1" alpha="1" colorSpace="calibratedRGB"/>
                         <constraints>
                             <constraint firstItem="Qgm-gt-QHB" firstAttribute="leading" secondItem="eFV-Mf-82R" secondAttribute="leading" constant="10" id="Di9-kk-t7S"/>
                             <constraint firstAttribute="trailing" secondItem="ZEy-rA-ish" secondAttribute="trailing" id="NTf-3C-4Ro"/>