iOS: Initial CAF setup;

CastState handling;
CastButton press handling;

example/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
 	<key>CFBundleVersion</key>
 	<string>1.0</string>
 	<key>MinimumOSVersion</key>
-  <string>8.0</string>
+	<string>9.0</string>
 </dict>
 </plist>

example/ios/Podfile.lock

@@ -2,11 +2,23 @@ PODS:
   - Flutter (1.0.0)
   - flutter_cast_framework (0.0.1):
     - Flutter
+    - google-cast-sdk-no-bluetooth (~> 4.4.4)
+  - google-cast-sdk-no-bluetooth (4.4.4):
+    - google-cast-sdk-no-bluetooth/Core (= 4.4.4)
+    - Protobuf (~> 3.0)
+  - google-cast-sdk-no-bluetooth/Core (4.4.4):
+    - Protobuf (~> 3.0)
+  - Protobuf (3.9.0)
 
 DEPENDENCIES:
   - Flutter (from `.symlinks/flutter/ios`)
   - flutter_cast_framework (from `.symlinks/plugins/flutter_cast_framework/ios`)
 
+SPEC REPOS:
+  https://github.com/cocoapods/specs.git:
+    - google-cast-sdk-no-bluetooth
+    - Protobuf
+
 EXTERNAL SOURCES:
   Flutter:
     :path: ".symlinks/flutter/ios"
@@ -15,7 +27,9 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
-  flutter_cast_framework: 949a52df62065109b8e46f32c14230e095963af1
+  flutter_cast_framework: 2728e840a40f44fb3cbcedbcd2c8d3f4efd53839
+  google-cast-sdk-no-bluetooth: e0af19280673fba052f7fc3ddde6116c733ce505
+  Protobuf: 1097ca58584c8d9be81bfbf2c5ff5975648dd87a
 
 PODFILE CHECKSUM: b6a0a141693093b304368d08511b46cf3d1d0ac5
 

example/ios/Runner.xcodeproj/project.pbxproj

@@ -19,6 +19,7 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		9B17E22623782F2C00BEFC07 /* ExternalAccessory.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9B17E22523782F2C00BEFC07 /* ExternalAccessory.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -54,6 +55,8 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		9B17E22423782F2C00BEFC07 /* Runner.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = Runner.entitlements; sourceTree = "<group>"; };
+		9B17E22523782F2C00BEFC07 /* ExternalAccessory.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ExternalAccessory.framework; path = System/Library/Frameworks/ExternalAccessory.framework; sourceTree = SDKROOT; };
 		9DB98B1012103C7DDE22DE7D /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		DD9A724C61B1334DC791A10B /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -65,6 +68,7 @@
 			files = (
 				9705A1C61CF904A100538489 /* Flutter.framework in Frameworks */,
 				3B80C3941E831B6300D905FE /* App.framework in Frameworks */,
+				9B17E22623782F2C00BEFC07 /* ExternalAccessory.framework in Frameworks */,
 				67C5DD8CFC4D28C033AC72C9 /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -85,6 +89,7 @@
 		691BB78022BE574F32D5AC40 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				9B17E22523782F2C00BEFC07 /* ExternalAccessory.framework */,
 				9DB98B1012103C7DDE22DE7D /* Pods_Runner.framework */,
 			);
 			name = Frameworks;
@@ -125,6 +130,7 @@
 		97C146F01CF9000F007C117D /* Runner */ = {
 			isa = PBXGroup;
 			children = (
+				9B17E22423782F2C00BEFC07 /* Runner.entitlements */,
 				97C146FA1CF9000F007C117D /* Main.storyboard */,
 				97C146FD1CF9000F007C117D /* Assets.xcassets */,
 				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
@@ -160,6 +166,7 @@
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
 				D442A0785939ED7C311A5340 /* [CP] Embed Pods Frameworks */,
+				F8453FE49677B54947F70C12 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -285,6 +292,21 @@
 			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
+		F8453FE49677B54947F70C12 /* [CP] Copy Pods Resources */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Copy Pods Resources";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-resources.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -374,6 +396,7 @@
 			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
 				DEVELOPMENT_TEAM = D9PN69G5DB;
 				ENABLE_BITCODE = NO;
@@ -382,12 +405,13 @@
 					"$(PROJECT_DIR)/Flutter",
 				);
 				INFOPLIST_FILE = Runner/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.gianlucaparadise.flutterCastFrameworkEx;
+				PRODUCT_BUNDLE_IDENTIFIER = com.gianlucaparadise.FlutterCastFrameworkExam;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 4.0;
@@ -508,6 +532,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
 				DEVELOPMENT_TEAM = D9PN69G5DB;
 				ENABLE_BITCODE = NO;
@@ -516,12 +541,13 @@
 					"$(PROJECT_DIR)/Flutter",
 				);
 				INFOPLIST_FILE = Runner/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.gianlucaparadise.flutterCastFrameworkEx;
+				PRODUCT_BUNDLE_IDENTIFIER = com.gianlucaparadise.FlutterCastFrameworkExam;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@@ -537,6 +563,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
 				DEVELOPMENT_TEAM = D9PN69G5DB;
 				ENABLE_BITCODE = NO;
@@ -545,12 +572,13 @@
 					"$(PROJECT_DIR)/Flutter",
 				);
 				INFOPLIST_FILE = Runner/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.gianlucaparadise.flutterCastFrameworkEx;
+				PRODUCT_BUNDLE_IDENTIFIER = com.gianlucaparadise.FlutterCastFrameworkExam;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_SWIFT3_OBJC_INFERENCE = On;

example/ios/Runner/AppDelegate.swift

@@ -1,13 +1,35 @@
 import UIKit
 import Flutter
+import GoogleCast
 
 @UIApplicationMain
-@objc class AppDelegate: FlutterAppDelegate {
+@objc class AppDelegate: FlutterAppDelegate, GCKLoggerDelegate {
+    let kReceiverAppID = kGCKDefaultMediaReceiverApplicationID
+    let kDebugLoggingEnabled = true
+    
     override func application(
         _ application: UIApplication,
         didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
     ) -> Bool {
+        let criteria = GCKDiscoveryCriteria(applicationID: kReceiverAppID)
+        let options = GCKCastOptions(discoveryCriteria: criteria)
+        GCKCastContext.setSharedInstanceWith(options)
+
+        // Enable logger.
+        GCKLogger.sharedInstance().delegate = self
+        
         GeneratedPluginRegistrant.register(with: self)
         return super.application(application, didFinishLaunchingWithOptions: launchOptions)
     }
+    
+    // MARK: - GCKLoggerDelegate
+    
+    func logMessage(_ message: String,
+                    at level: GCKLoggerLevel,
+                    fromFunction function: String,
+                    location: String) {
+        if (kDebugLoggingEnabled) {
+            print(function + " - " + message)
+        }
+    }
 }

example/ios/Runner/Runner.entitlements

@@ -0,0 +1,5 @@
+<?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/>
+</plist>

flutter_cast_framework.iml

@@ -11,6 +11,9 @@
       <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_cast_framework/example/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_cast_framework/example/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_cast_framework/example/build" />
     </content>
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Dart SDK" level="project" />

ios/Classes/MethodNames.swift

@@ -0,0 +1,13 @@
+//
+//  MethodNames.swift
+//  flutter_cast_framework
+//
+//  Created by Gianluca Paradiso on 09/11/2019.
+//
+
+import Foundation
+
+enum MethodNames : String {
+    case onCastStateChanged = "CastContext.onCastStateChanged"
+    case showCastDialog = "showCastDialog"
+}

ios/Classes/SwiftFlutterCastFrameworkPlugin.swift

@@ -1,14 +1,42 @@
 import Flutter
 import UIKit
+import GoogleCast
 
 public class SwiftFlutterCastFrameworkPlugin: NSObject, FlutterPlugin {
     public static func register(with registrar: FlutterPluginRegistrar) {
         let channel = FlutterMethodChannel(name: "flutter_cast_framework", binaryMessenger: registrar.messenger())
-    let instance = SwiftFlutterCastFrameworkPlugin()
+        let instance = SwiftFlutterCastFrameworkPlugin(channel: channel)
         registrar.addMethodCallDelegate(instance, channel: channel)
     }
     
+    let castContext: GCKCastContext
+    var stateObserver: NSKeyValueObservation?
+    var channel: FlutterMethodChannel
+    
+    init(channel: FlutterMethodChannel) {
+        self.channel = channel
+        self.castContext = GCKCastContext.sharedInstance()
+        self.stateObserver = GCKCastContext.sharedInstance().observe(\.castState, options: [.new, .old, .initial]){ (state, change) in
+            let castStateRaw = GCKCastContext.sharedInstance().castState.rawValue
+            // Android CastStates are 1-to-4, while iOS CastStates are 0-to-3. I align iOS to Android by adding 1
+            let castStateRawAdjusted = castStateRaw + 1
+            print("cast state change to: \(castStateRawAdjusted)")
+            channel.invokeMethod(MethodNames.onCastStateChanged.rawValue, arguments: castStateRawAdjusted)
+        }
+        super.init()
+    }
+    
     public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
-    result("iOS " + UIDevice.current.systemVersion)
+        switch call.method {
+        case MethodNames.showCastDialog.rawValue:
+            castContext.presentCastDialog()
+        default:
+            print("Method [\(call.method)] is not implemented.")
+        }
+    }
+    
+    deinit {
+        stateObserver?.invalidate()
+        stateObserver = nil
     }
 }

ios/flutter_cast_framework.podspec

@@ -14,8 +14,11 @@ A new flutter plugin project.
   s.source           = { :path => '.' }
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/*.h'
-  s.dependency 'Flutter'
+  s.static_framework = true
 
-  s.ios.deployment_target = '8.0'
+  s.dependency 'Flutter'
+  s.dependency 'google-cast-sdk-no-bluetooth', '~> 4.4.4'
+
+  s.ios.deployment_target = '9.0'
 end