iOS项目中加入flutter

新建一个iOS项目Test

在iOS同级目录下建一个flutter module

flutter create --template module my_flutter

podfile编写如下

# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'

target 'Test' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!
flutter_application_path = '../my_flutter'
load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')
install_all_flutter_pods(flutter_application_path)
  # Pods for Test

end

post_install do |installer|
  flutter_post_install(installer) if defined?(flutter_post_install)
end

 使用

• 直接使用

1. navigationController?.pushViewController(FlutterViewController(), animated: true)

• 有交互的使用

• import UIKit
  import Flutter
  // The following library connects plugins with iOS platform code to this app.
  //import FlutterPluginRegistrant
  
  @UIApplicationMain
  class AppDelegate: FlutterAppDelegate { // More on the FlutterAppDelegate.
      let engines = FlutterEngineGroup(name: "ios_fultter_double", project: nil)
  
    override func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
      // Runs the default Dart entrypoint with a default Flutter route.
  //    flutterEngine.run();
      // Connects plugins with iOS platform code to this app.
  //    GeneratedPluginRegistrant.register(with: self.flutterEngine);
      return super.application(application, didFinishLaunchingWithOptions: launchOptions);
    }
  }
  
  
  // Copyright 2021 The Flutter team. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  import Flutter
  import FlutterPluginRegistrant
  import Foundation
  
  /// A FlutterViewController intended for the MyApp widget in the Flutter module.
  ///
  /// This view controller maintains a connection to the Flutter instance and syncs it with the
  /// datamodel.  In practice you should override the other init methods or switch to composition
  /// instead of inheritence.
  class InteractionViewController: FlutterViewController {
      private var channel: FlutterMethodChannel?
  
      init(withEntrypoint entryPoint: String?) {
          let appDelegate: AppDelegate = UIApplication.shared.delegate as! AppDelegate
          let newEngine = appDelegate.engines.makeEngine(withEntrypoint: entryPoint, libraryURI: nil)
          GeneratedPluginRegistrant.register(with: newEngine)
          super.init(engine: newEngine, nibName: nil, bundle: nil)
  
      }
  
     
  
      required init(coder aDecoder: NSCoder) {
          fatalError("init(coder:) has not been implemented")
      }
  
  
      override func viewDidLoad() {
          super.viewDidLoad()
          channel = FlutterMethodChannel(
              name: "ios_fultter_double", binaryMessenger: engine!.binaryMessenger)
          
          let navController = navigationController!
          channel!.setMethodCallHandler { (call: FlutterMethodCall, result: @escaping FlutterResult) in
              if call.method == "incrementCount" {
                  result(nil)
              } else if call.method == "next" {
                  navController.pushViewController(FlutterViewController(), animated: true)
                  result(nil)
              } else {
                  result(FlutterMethodNotImplemented)
              }
          }
      }
  }

  // Copyright 2021 The Flutter team. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  import 'package:flutter/material.dart';
  import 'package:flutter/services.dart';
  
  void main() => runApp(const MyApp(color: Colors.blue));
  
  @pragma('vm:entry-point')
  void topMain() => runApp(const MyApp(color: Colors.green));
  
  @pragma('vm:entry-point')
  void bottomMain() => runApp(const MyApp(color: Colors.purple));
  
  class MyApp extends StatelessWidget {
    const MyApp({super.key, required this.color});
  
    final MaterialColor color;
  
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          colorSchemeSeed: color,
          useMaterial3: true,
          appBarTheme: AppBarTheme(
            backgroundColor: color,
            foregroundColor: Colors.white,
            elevation: 8,
          ),
        ),
        home: const MyHomePage(title: 'Flutter Demo Home Page'),
      );
    }
  }
  
  class MyHomePage extends StatefulWidget {
    const MyHomePage({super.key, required this.title});
    final String title;
  
    @override
    State<MyHomePage> createState() => _MyHomePageState();
  }
  
  class _MyHomePageState extends State<MyHomePage> {
    int? _counter = 0;
    late MethodChannel _channel;
  
    @override
    void initState() {
      super.initState();
      _channel = const MethodChannel('ios_fultter_double');
      _channel.setMethodCallHandler((call) async {
        if (call.method == "setCount") {
          // A notification that the host platform's data model has been updated.
          setState(() {
            _counter = call.arguments as int?;
          });
        } else {
          throw Exception('not implemented ${call.method}');
        }
      });
    }
  
    void _incrementCounter() {
      // Mutations to the data model are forwarded to the host platform.
      _channel.invokeMethod<void>("incrementCount", _counter);
    }
  
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              const Text(
                'You have pushed the button this many times:',
              ),
              Text(
                '$_counter',
                style: Theme.of(context).textTheme.headlineMedium,
              ),
              TextButton(
                onPressed: _incrementCounter,
                child: const Text('Add'),
              ),
              TextButton(
                onPressed: () {
                  _channel.invokeMethod<void>("next", _counter);
                },
                child: const Text('Next'),
              ),
              ElevatedButton(
                onPressed: () async {
                  // Use the url_launcher plugin to open the Flutter docs in
                  // a browser.
                  final url = Uri.parse('https://flutter.dev/docs');
                },
                child: const Text('Open Flutter Doc11s'),
              ),
            ],
          ),
        ),
      );
    }
  }