Changed iOS LaunchScreen from xib to storyboard (#28239)

Summary:
> Starting April 30, 2020, all apps submitted to the App Store must use an Xcode storyboard to provide the app’s launch screen and all iPhone apps must support all iPhone screens.

Updated iOS Launch screen as per [App Store policy change](https://developer.apple.com/news/?id=03042020b).

Community discussion: react-native-community/discussions-and-proposals#209

## Changelog

Changed iOS Launch Screen from a `xib` to `storyboard`. The `LaunchScreen.xib` file has been replaced with `LaunchScreen.storyboard`. Xcode automatically picks up the new Launch Screen no additional change is required.

[iOS] [Deleted] - Deleted LaunchScreen.xib
[iOS] [Added] - Added LaunchScreen.storyboard
Pull Request resolved: #28239

Test Plan: Build the Xcode project under `template/iOS` and verify that the new launch screen is identical to the previous one.

Reviewed By: cpojer

Differential Revision: D20408892

Pulled By: hramos

fbshipit-source-id: 9c38df58d1304088a23f3d73e0fbd87675804f1a

Author: jeswinsimon

RNTester/Podfile.lock

@@ -512,4 +512,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 5f0be4be03d6934478b9dd621bfbab4383b8c85d
 
-COCOAPODS: 1.9.1
+COCOAPODS: 1.8.4

RNTester/RNTester/Base.lproj/LaunchScreen.xib

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15702" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15704"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <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>
+                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="obG-Y5-kRd">
+                                <rect key="frame" x="0.0" y="647" width="375" height="0.0"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="RNTester" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="GJd-Yh-RWb">
+                                <rect key="frame" x="0.0" y="202" width="375" height="43"/>
+                                <fontDescription key="fontDescription" type="boldSystem" pointSize="36"/>
+                                <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) Facebook, Inc. and its affiliates." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="MN2-I3-ftu">
+                                <rect key="frame" x="0.0" y="626" width="375" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="Bcu-3y-fUS" firstAttribute="centerX" secondItem="obG-Y5-kRd" secondAttribute="centerX" id="5cz-MP-9tL"/>
+                            <constraint firstItem="Bcu-3y-fUS" firstAttribute="bottom" secondItem="MN2-I3-ftu" secondAttribute="bottom" constant="20" id="OZV-Vh-mqD"/>
+                            <constraint firstItem="Bcu-3y-fUS" firstAttribute="centerX" secondItem="GJd-Yh-RWb" secondAttribute="centerX" id="Q3B-4B-g5h"/>
+                            <constraint firstItem="obG-Y5-kRd" firstAttribute="leading" secondItem="Bcu-3y-fUS" secondAttribute="leading" symbolic="YES" id="SfN-ll-jLj"/>
+                            <constraint firstAttribute="bottom" secondItem="obG-Y5-kRd" secondAttribute="bottom" constant="20" id="Y44-ml-fuU"/>
+                            <constraint firstItem="MN2-I3-ftu" firstAttribute="centerX" secondItem="Bcu-3y-fUS" secondAttribute="centerX" id="akx-eg-2ui"/>
+                            <constraint firstItem="MN2-I3-ftu" firstAttribute="leading" secondItem="Bcu-3y-fUS" secondAttribute="leading" id="i1E-0Y-4RG"/>
+                            <constraint firstItem="GJd-Yh-RWb" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="bottom" multiplier="1/3" constant="1" id="moa-c2-u7t"/>
+                            <constraint firstItem="GJd-Yh-RWb" firstAttribute="leading" secondItem="Bcu-3y-fUS" secondAttribute="leading" symbolic="YES" id="x7j-FC-K8j"/>
+                        </constraints>
+                        <viewLayoutGuide key="safeArea" id="Bcu-3y-fUS"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="52.173913043478265" y="375"/>
+        </scene>
+    </scenes>
+</document>

RNTester/RNTester/LaunchScreen.storyboard

@@ -3,11 +3,10 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 50;
+	objectVersion = 51;
 	objects = {
 
 /* Begin PBXBuildFile section */
-		13B07FBD1A68108700A75B9A /* LaunchScreen.xib in Resources */ = {isa = PBXBuildFile; fileRef = 13B07FB11A68108700A75B9A /* LaunchScreen.xib */; };
 		13B07FC11A68108700A75B9A /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 13B07FB71A68108700A75B9A /* main.m */; };
 		272E6B3F1BEA849E001FCF37 /* UpdatePropertiesExampleView.m in Sources */ = {isa = PBXBuildFile; fileRef = 272E6B3C1BEA849E001FCF37 /* UpdatePropertiesExampleView.m */; };
 		27F441EC1BEBE5030039B79C /* FlexibleSizeExampleView.m in Sources */ = {isa = PBXBuildFile; fileRef = 27F441E81BEBE5030039B79C /* FlexibleSizeExampleView.m */; };
@@ -18,6 +17,7 @@
 		5CB07C9B226467E60039471C /* RNTesterTurboModuleProvider.mm in Sources */ = {isa = PBXBuildFile; fileRef = 5CB07C99226467E60039471C /* RNTesterTurboModuleProvider.mm */; };
 		6766440649168A1FAD1DB4A4 /* libPods-RNTesterIntegrationTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 5F836A7C97EC1BA121BA5A2A /* libPods-RNTesterIntegrationTests.a */; };
 		6ABAB5205C9B8E0726E12033 /* libPods-RNTester.a in Frameworks */ = {isa = PBXBuildFile; fileRef = B5C8E567A4E6281113811CB1 /* libPods-RNTester.a */; };
+		8145AE06241172D900A3F8DA /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 8145AE05241172D900A3F8DA /* LaunchScreen.storyboard */; };
 		85C7978AB28C149170A56955 /* libPods-RNTesterUnitTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 11941849F77C552FDC3EED77 /* libPods-RNTesterUnitTests.a */; };
 		E7C1241A22BEC44B00DA25C0 /* RNTesterIntegrationTests.m in Sources */ = {isa = PBXBuildFile; fileRef = E7C1241922BEC44B00DA25C0 /* RNTesterIntegrationTests.m */; };
 		E7DB20D122B2BAA6005AC45F /* RCTBundleURLProviderTests.m in Sources */ = {isa = PBXBuildFile; fileRef = E7DB20A922B2BAA3005AC45F /* RCTBundleURLProviderTests.m */; };
@@ -73,7 +73,6 @@
 		11941849F77C552FDC3EED77 /* libPods-RNTesterUnitTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-RNTesterUnitTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		13B07F961A680F5B00A75B9A /* RNTester.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = RNTester.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		13B07FAF1A68108700A75B9A /* AppDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = AppDelegate.h; path = RNTester/AppDelegate.h; sourceTree = "<group>"; };
-		13B07FB21A68108700A75B9A /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/LaunchScreen.xib; sourceTree = "<group>"; };
 		13B07FB61A68108700A75B9A /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = Info.plist; path = RNTester/Info.plist; sourceTree = "<group>"; };
 		13B07FB71A68108700A75B9A /* main.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = main.m; path = RNTester/main.m; sourceTree = "<group>"; };
 		272E6B3B1BEA849E001FCF37 /* UpdatePropertiesExampleView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = UpdatePropertiesExampleView.h; path = RNTester/NativeExampleViews/UpdatePropertiesExampleView.h; sourceTree = "<group>"; };
@@ -90,6 +89,7 @@
 		5CB07C9A226467E60039471C /* RNTesterTurboModuleProvider.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = RNTesterTurboModuleProvider.h; path = RNTester/RNTesterTurboModuleProvider.h; sourceTree = "<group>"; };
 		5F836A7C97EC1BA121BA5A2A /* libPods-RNTesterIntegrationTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-RNTesterIntegrationTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		7D51F73F0DA20287418D98BD /* Pods-RNTesterIntegrationTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RNTesterIntegrationTests.release.xcconfig"; path = "Pods/Target Support Files/Pods-RNTesterIntegrationTests/Pods-RNTesterIntegrationTests.release.xcconfig"; sourceTree = "<group>"; };
+		8145AE05241172D900A3F8DA /* LaunchScreen.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; name = LaunchScreen.storyboard; path = RNTester/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		972A459EE6CF8CC63531A088 /* Pods-RNTesterIntegrationTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RNTesterIntegrationTests.debug.xcconfig"; path = "Pods/Target Support Files/Pods-RNTesterIntegrationTests/Pods-RNTesterIntegrationTests.debug.xcconfig"; sourceTree = "<group>"; };
 		98233960D1D6A1977D1C7EAF /* Pods-RNTester.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RNTester.debug.xcconfig"; path = "Pods/Target Support Files/Pods-RNTester/Pods-RNTester.debug.xcconfig"; sourceTree = "<group>"; };
 		B5C8E567A4E6281113811CB1 /* libPods-RNTester.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-RNTester.a"; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -219,7 +219,7 @@
 				5CB07C99226467E60039471C /* RNTesterTurboModuleProvider.mm */,
 				13B07FB71A68108700A75B9A /* main.m */,
 				2DDEF00F1F84BF7B00DBDF73 /* Images.xcassets */,
-				13B07FB11A68108700A75B9A /* LaunchScreen.xib */,
+				8145AE05241172D900A3F8DA /* LaunchScreen.storyboard */,
 				680759612239798500290469 /* Fabric */,
 				272E6B3A1BEA846C001FCF37 /* NativeExampleViews */,
 				1323F18D1C04ABAC0091BED0 /* Supporting Files */,
@@ -492,8 +492,8 @@
 			buildActionMask = 2147483647;
 			files = (
 				2DDEF0101F84BF7B00DBDF73 /* Images.xcassets in Resources */,
+				8145AE06241172D900A3F8DA /* LaunchScreen.storyboard in Resources */,
 				3D2AFAF51D646CF80089D1A3 /* legacy_image@2x.png in Resources */,
-				13B07FBD1A68108700A75B9A /* LaunchScreen.xib in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -730,18 +730,6 @@
 		};
 /* End PBXTargetDependency section */
 
-/* Begin PBXVariantGroup section */
-		13B07FB11A68108700A75B9A /* LaunchScreen.xib */ = {
-			isa = PBXVariantGroup;
-			children = (
-				13B07FB21A68108700A75B9A /* Base */,
-			);
-			name = LaunchScreen.xib;
-			path = RNTester;
-			sourceTree = "<group>";
-		};
-/* End PBXVariantGroup section */
-
 /* Begin XCBuildConfiguration section */
 		13B07F941A680F5B00A75B9A /* Debug */ = {
 			isa = XCBuildConfiguration;