Added IosQuickStartApp code

Podfile

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+# Uncomment the next line to define a global platform for your project
+platform :ios, '10.0'
+
+target 'plivoIosQuickstartApp' do
+  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
+  use_frameworks!
+
+  # Pods for plivoIosQuickstartApp
+
+  target 'plivoIosQuickstartAppTests' do
+    inherit! :search_paths
+    # Pods for testing
+  end
+
+  target 'plivoIosQuickstartAppUITests' do
+    inherit! :search_paths
+    # Pods for testing
+  end
+
+end

plivoIosQuickstartApp-Bridging-Header.h

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+//
+//  Use this file to import your target's public headers that you would like to expose to Swift.
+//
+
+#import "Constants.h"

plivoIosQuickstartApp.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

plivoIosQuickstartApp.xcodeproj/xcuserdata/altanaibisht.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

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+<?xml version="1.0" encoding="UTF-8"?>
+<Bucket
+   type = "1"
+   version = "2.0">
+</Bucket>

plivoIosQuickstartApp.xcodeproj/xcuserdata/altanaibisht.xcuserdatad/xcschemes/xcschememanagement.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>IntentHandler.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+		<key>IntentHandlerUI.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>2</integer>
+		</dict>
+		<key>plivoIosQuickstartApp.xcscheme</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+		<key>plivoIosQuickstartApp.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

plivoIosQuickstartApp.xcodeproj/xcuserdata/venkatasriramkarthik.xcuserdatad/xcschemes/xcschememanagement.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>plivoIosQuickstartApp.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

plivoIosQuickstartApp/AppDelegate.swift

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+//
+//  AppDelegate.swift
+//  plivoIosQuickstartApp
+//
+//  Created by Altanai Bisht on 12/11/18.
+//  Copyright © 2018 Altanai Bisht. All rights reserved.
+//
+
+import UIKit
+import PushKit
+import AVFoundation
+import Intents
+import UserNotifications
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate, PKPushRegistryDelegate, UNUserNotificationCenterDelegate  {
+
+    func pushRegistry(_ registry: PKPushRegistry, didUpdate pushCredentials: PKPushCredentials, for type: PKPushType) {
+
+    }
+
+    var window: UIWindow?
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        // Override point for customization after application launch.
+
+        //For VOIP Notificaitons
+        let center = UNUserNotificationCenter.current()
+        center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in
+            // Enable or disable features based on authorization.
+        }
+        application.registerForRemoteNotifications()
+
+        //Request Record permission
+        //audio session acts as an intermediary between your app and the operating system—and, in turn, the underlying audio hardware.
+        let audioSession = AVAudioSession.sharedInstance()
+        if (audioSession.responds(to: #selector(AVAudioSession.requestRecordPermission(_:)))) {
+            AVAudioSession.sharedInstance().requestRecordPermission({(granted: Bool)-> Void in
+                if granted {
+                    print("AVAudioSession permission - granted ")
+                    do {
+                        //try session.setCategory(AVAudioSession.Category(rawValue: convertFromAVAudioSessionCategory(AVAudioSession.Category.playAndRecord)), mode: AVAudioSession.Mode.default)
+                        //try session.setCategory(AVAudioSession.Category.playAndRecord, mode: AVAudioSession.Mode.default)
+                        //try session.setCategory(AVAudioSession.Category.playAndRecord)
+                        try audioSession.setCategory(AVAudioSession.Category.playAndRecord, mode: AVAudioSession.Mode.voiceChat, options: .defaultToSpeaker)
+                        //try session.setCategory(AVAudioSession.Category.playAndRecord, mode: .default, options: [])
+
+                        try audioSession.setActive(true)
+                    }
+                    catch {
+                        print("AVAudioSession permission - Couldn't set Audio session category")
+                    }
+                } else{
+                    print("AVAudioSession permission - not granted")
+                }
+            })
+        }
+
+        let _mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
+        let controller: ViewController? = _mainStoryboard.instantiateViewController(withIdentifier: "ViewController") as? ViewController
+        window?.rootViewController = controller
+
+        return true
+    }
+
+    func applicationWillResignActive(_ application: UIApplication) {
+        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
+        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
+    }
+
+    func applicationDidEnterBackground(_ application: UIApplication) {
+        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
+        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
+    }
+
+    func applicationWillEnterForeground(_ application: UIApplication) {
+        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
+    }
+
+    func applicationDidBecomeActive(_ application: UIApplication) {
+        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
+    }
+
+    func applicationWillTerminate(_ application: UIApplication) {
+        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
+    }
+
+    // Register for VoIP notifications
+    func voipRegistration() {
+        let mainQueue = DispatchQueue.main
+        // Create a push registry object
+        let voipResistry = PKPushRegistry(queue: mainQueue)
+        // Set the registry's delegate to self
+        voipResistry.delegate = (self as? PKPushRegistryDelegate)
+        //Set the push type to VOIP
+        voipResistry.desiredPushTypes = Set<AnyHashable>([PKPushType.voIP]) as? Set<PKPushType>
+    }
+
+}

plivoIosQuickstartApp/Assets.xcassets/AppIcon-1.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "[email protected]",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "[email protected]",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "size" : "1024x1024",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}