Make sample app easier to understand

- Remove the launch screen.
- Add a label explaining where to look for the code and results.
- Delete unnecessary boilerplate code.

7 files changed, 36 insertions, 71 deletions

diff --git a/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj b/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
index 916aa24d9d..611eb6032d 100644
--- a/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
+++ b/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
@@ -12,7 +12,6 @@
 		6369A2761A9322E20015FC5C /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2751A9322E20015FC5C /* ViewController.m */; };
 		6369A2791A9322E20015FC5C /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 6369A2771A9322E20015FC5C /* Main.storyboard */; };
 		6369A27B1A9322E20015FC5C /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 6369A27A1A9322E20015FC5C /* Images.xcassets */; };
-		6369A27E1A9322E20015FC5C /* LaunchScreen.xib in Resources */ = {isa = PBXBuildFile; fileRef = 6369A27C1A9322E20015FC5C /* LaunchScreen.xib */; };
 		FC81FE63CA655031F3524EC0 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 2DC7B7C4C0410F43B9621631 /* libPods.a */; };
 /* End PBXBuildFile section */
 
@@ -27,7 +26,6 @@
 		6369A2751A9322E20015FC5C /* ViewController.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ViewController.m; sourceTree = "<group>"; };
 		6369A2781A9322E20015FC5C /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		6369A27A1A9322E20015FC5C /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
-		6369A27D1A9322E20015FC5C /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/LaunchScreen.xib; sourceTree = "<group>"; };
 		AC29DD6FCDF962F519FEBB0D /* Pods.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.debug.xcconfig; path = "Pods/Target Support Files/Pods/Pods.debug.xcconfig"; sourceTree = "<group>"; };
 		C68330F8D451CC6ACEABA09F /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -71,7 +69,6 @@
 				6369A2751A9322E20015FC5C /* ViewController.m */,
 				6369A2771A9322E20015FC5C /* Main.storyboard */,
 				6369A27A1A9322E20015FC5C /* Images.xcassets */,
-				6369A27C1A9322E20015FC5C /* LaunchScreen.xib */,
 				6369A26D1A9322E20015FC5C /* Supporting Files */,
 			);
 			path = Sample;
@@ -163,7 +160,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				6369A2791A9322E20015FC5C /* Main.storyboard in Resources */,
-				6369A27E1A9322E20015FC5C /* LaunchScreen.xib in Resources */,
 				6369A27B1A9322E20015FC5C /* Images.xcassets in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -225,14 +221,6 @@
 			name = Main.storyboard;
 			sourceTree = "<group>";
 		};
-		6369A27C1A9322E20015FC5C /* LaunchScreen.xib */ = {
-			isa = PBXVariantGroup;
-			children = (
-				6369A27D1A9322E20015FC5C /* Base */,
-			);
-			name = LaunchScreen.xib;
-			sourceTree = "<group>";
-		};
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
diff --git a/src/objective-c/examples/Sample/Sample/AppDelegate.h b/src/objective-c/examples/Sample/Sample/AppDelegate.h
index b1857f28e0..102e7f3ade 100644
--- a/src/objective-c/examples/Sample/Sample/AppDelegate.h
+++ b/src/objective-c/examples/Sample/Sample/AppDelegate.h
@@ -34,8 +34,5 @@
 #import <UIKit/UIKit.h>
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
-
 @property (strong, nonatomic) UIWindow *window;
-
 @end
-
diff --git a/src/objective-c/examples/Sample/Sample/AppDelegate.m b/src/objective-c/examples/Sample/Sample/AppDelegate.m
index 12e1ad9d67..a38e36651e 100644
--- a/src/objective-c/examples/Sample/Sample/AppDelegate.m
+++ b/src/objective-c/examples/Sample/Sample/AppDelegate.m
@@ -33,13 +33,5 @@
 
 #import "AppDelegate.h"
 
-@interface AppDelegate ()
-@end
-
 @implementation AppDelegate
-
-- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-  return YES;
-}
-
 @end
diff --git a/src/objective-c/examples/Sample/Sample/Base.lproj/LaunchScreen.xib b/src/objective-c/examples/Sample/Sample/Base.lproj/LaunchScreen.xib
deleted file mode 100644
index c51a8e199e..0000000000
--- a/src/objective-c/examples/Sample/Sample/Base.lproj/LaunchScreen.xib
+++ /dev/null
@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="6214" systemVersion="14A314h" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
-    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6207"/>
-        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
-    </dependencies>
-    <objects>
-        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
-        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
-        <view contentMode="scaleToFill" id="iN0-l3-epB">
-            <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
-            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-            <subviews>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2015 gRPC. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
-                    <rect key="frame" x="20" y="439" width="441" height="21"/>
-                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
-                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
-                    <nil key="highlightedColor"/>
-                </label>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Sample" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="kId-c2-rCX">
-                    <rect key="frame" x="20" y="140" width="441" height="43"/>
-                    <fontDescription key="fontDescription" type="boldSystem" pointSize="36"/>
-                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
-                    <nil key="highlightedColor"/>
-                </label>
-            </subviews>
-            <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
-            <constraints>
-                <constraint firstItem="kId-c2-rCX" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="bottom" multiplier="1/3" constant="1" id="5cJ-9S-tgC"/>
-                <constraint firstAttribute="centerX" secondItem="kId-c2-rCX" secondAttribute="centerX" id="Koa-jz-hwk"/>
-                <constraint firstAttribute="bottom" secondItem="8ie-xW-0ye" secondAttribute="bottom" constant="20" id="Kzo-t9-V3l"/>
-                <constraint firstItem="8ie-xW-0ye" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="MfP-vx-nX0"/>
-                <constraint firstAttribute="centerX" secondItem="8ie-xW-0ye" secondAttribute="centerX" id="ZEH-qu-HZ9"/>
-                <constraint firstItem="kId-c2-rCX" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="fvb-Df-36g"/>
-            </constraints>
-            <nil key="simulatedStatusBarMetrics"/>
-            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
-            <point key="canvasLocation" x="548" y="455"/>
-        </view>
-    </objects>
-</document>
diff --git a/src/objective-c/examples/Sample/Sample/Base.lproj/Main.storyboard b/src/objective-c/examples/Sample/Sample/Base.lproj/Main.storyboard
index f56d2f3bb5..8887b9e19f 100644
--- a/src/objective-c/examples/Sample/Sample/Base.lproj/Main.storyboard
+++ b/src/objective-c/examples/Sample/Sample/Base.lproj/Main.storyboard
@@ -1,13 +1,14 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="7702" systemVersion="14D131" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7701"/>
+        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
         <scene sceneID="tne-QT-ifu">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="" sceneMemberID="viewController">
+                <viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
@@ -15,7 +16,38 @@
                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" lineBreakMode="wordWrap" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="BWr-eN-L3y">
+                                <rect key="frame" x="16" y="20" width="568" height="150"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="385" id="exg-IV-Kl0"/>
+                                </constraints>
+                                <string key="text">Sample app launch finished.
+Check ViewController.m for the gRPC calls made, and the logs of this app for their results.
+(You may need to make XCode's Debug Area visible).</string>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                <nil key="highlightedColor"/>
+                                <variation key="default">
+                                    <mask key="constraints">
+                                        <exclude reference="exg-IV-Kl0"/>
+                                    </mask>
+                                </variation>
+                            </label>
+                        </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <constraints>
+                            <constraint firstItem="wfy-db-euE" firstAttribute="top" secondItem="BWr-eN-L3y" secondAttribute="bottom" constant="430" id="KFC-7p-hRl"/>
+                            <constraint firstAttribute="trailing" secondItem="BWr-eN-L3y" secondAttribute="trailing" constant="16" id="M9C-nN-tFv"/>
+                            <constraint firstItem="BWr-eN-L3y" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leadingMargin" id="SaP-0S-2LK"/>
+                            <constraint firstItem="wfy-db-euE" firstAttribute="top" secondItem="BWr-eN-L3y" secondAttribute="bottom" id="wjC-O4-kJg"/>
+                            <constraint firstItem="BWr-eN-L3y" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" id="ygF-6t-hrg"/>
+                        </constraints>
+                        <variation key="default">
+                            <mask key="constraints">
+                                <exclude reference="KFC-7p-hRl"/>
+                            </mask>
+                        </variation>
                     </view>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
diff --git a/src/objective-c/examples/Sample/Sample/Info.plist b/src/objective-c/examples/Sample/Sample/Info.plist
index ffdc8b3012..4436635ab4 100644
--- a/src/objective-c/examples/Sample/Sample/Info.plist
+++ b/src/objective-c/examples/Sample/Sample/Info.plist
@@ -23,7 +23,7 @@
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>UILaunchStoryboardName</key>
-	<string>LaunchScreen</string>
+	<string>Main</string>
 	<key>UIMainStoryboardFile</key>
 	<string>Main</string>
 	<key>UIRequiredDeviceCapabilities</key>
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.m b/src/objective-c/examples/Sample/Sample/ViewController.m
index 9b331fe43f..0011a4508d 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.m
+++ b/src/objective-c/examples/Sample/Sample/ViewController.m
@@ -40,9 +40,6 @@
 #import <RemoteTest/Messages.pbobjc.h>
 #import <RemoteTest/Test.pbrpc.h>
 
-@interface ViewController ()
-@end
-
 @implementation ViewController
 
 - (void)viewDidLoad {