ios: update sample PiP app

- Xcode 10.2 + Swift 5
- Latest SDK API
- Fix warnings

ios/example-pip-app/example-pip-app.xcodeproj/project.pbxproj

 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0920;
-				LastUpgradeCheck = 0920;
+				LastUpgradeCheck = 1020;
 				ORGANIZATIONNAME = "Atlassian Inc";
 				TargetAttributes = {
 					C6F99C36204DE6BE0001F710 = {
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 		C6F99C4A204DE6BE0001F710 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_STYLE = Automatic;
 				FRAMEWORK_SEARCH_PATHS = "../../node_modules/react-native-webrtc/ios";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.jitsi.example-pip-app";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
 		C6F99C4B204DE6BE0001F710 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_STYLE = Automatic;
 				FRAMEWORK_SEARCH_PATHS = "../../node_modules/react-native-webrtc/ios";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.jitsi.example-pip-app";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;

ios/example-pip-app/src/AppDelegate.swift

     var window: UIWindow?
 
     func application(_ application: UIApplication,
-                     didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
+                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
         guard let launchOptions = launchOptions else { return false }
-        return JitsiMeetView.application(application, didFinishLaunchingWithOptions: launchOptions)
+        return JitsiMeet.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
     }
 
     // MARK: - Linking delegate methods
 
     func application(_ application: UIApplication,
                      continue userActivity: NSUserActivity,
-                     restorationHandler: @escaping ([Any]?) -> Void) -> Bool {
-        return JitsiMeetView.application(application, continue: userActivity, restorationHandler: restorationHandler)
+                     restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
+        return JitsiMeet.sharedInstance().application(application, continue: userActivity, restorationHandler: restorationHandler)
     }
 
-    func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
-        return JitsiMeetView.application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
+    func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
+        return JitsiMeet.sharedInstance().application(app, open: url, options: options)
     }
 }

ios/example-pip-app/src/Info.plist

 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>The microphone is needed for making calls</string>
+	<key>NSCameraUsageDescription</key>
+	<string>The camera is needed for making calls</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>

ios/example-pip-app/src/ViewController.swift

 /*
- * Copyright @ 2017-present Atlassian Pty Ltd
+ * Copyright @ 2019-present 8x8, Inc.
+ * Copyright @ 2017-2018 Atlassian Pty Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
 
         // create and configure jitsimeet view
         let jitsiMeetView = JitsiMeetView()
-        jitsiMeetView.welcomePageEnabled = true
-        jitsiMeetView.pictureInPictureEnabled = true
-        jitsiMeetView.load(nil)
         jitsiMeetView.delegate = self
         self.jitsiMeetView = jitsiMeetView
+        let options = JitsiMeetConferenceOptions.fromBuilder { (builder) in
+            builder.welcomePageEnabled = true
+        }
+        jitsiMeetView.join(options)
 
         // Enable jitsimeet view to be a view that can be displayed
         // on top of all the things, and let the coordinator to manage
 }
 
 extension ViewController: JitsiMeetViewDelegate {
-
-    func conferenceFailed(_ data: [AnyHashable : Any]!) {
-        hideJitsiMeetViewAndCleanUp()
-    }
-
-    func conferenceLeft(_ data: [AnyHashable : Any]!) {
-        hideJitsiMeetViewAndCleanUp()
-    }
-
-    func enterPicture(inPicture data: [AnyHashable : Any]!) {
+    func conferenceTerminated(_ data: [AnyHashable : Any]!) {
         DispatchQueue.main.async {
-            self.pipViewCoordinator?.enterPictureInPicture()
+            self.pipViewCoordinator?.hide() { _ in
+                self.cleanUp()
+            }
         }
     }
 
-    private func hideJitsiMeetViewAndCleanUp() {
+    func enterPicture(inPicture data: [AnyHashable : Any]!) {
         DispatchQueue.main.async {
-            self.pipViewCoordinator?.hide() { _ in
-                self.cleanUp()
-            }
+            self.pipViewCoordinator?.enterPictureInPicture()
         }
     }
 }