README.md

Flutter Native Bridge Example

这里描述的是flutter与原生工程的通信交互

iOS

我的做法是写了个文件覆盖了methodChannel的代理方法，将收发功能封装进了一个类SwiftFlutterBridge.swift、并将通信约定字符写在了宏定义文件里FlutterBridgeConst.swift

• 必不可少的约定字符为以下三种(根据自己的项目需要去设定)

   static let MethodChannel = "com.example.flutter/method"
   
   static let EventChannel = "com.example.flutter/event"
   
   static let BasicMessageChannel = "com.example.flutter/basicMessage"

• 在AppDelegate里注册通信

   func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       
       // 注册与Flutter的通信
       SwiftFlutterBridge.shared.load(methodChannel: FlutterBridgeConst.MethodChannel, eventChannel: FlutterBridgeConst.EventChannel, messageChannel: FlutterBridgeConst.BasicMessageChannel)
       
       self.window?.backgroundColor = .white
       self.window?.rootViewController = UINavigationController(rootViewController: RootViewController())
       self.window?.makeKeyAndVisible()
       
       return true
   }

• 遵守协议代理及加载flutter页面 可以根据需要仅仅跳转或是直接加载

      SwiftFlutterBridge.shared.delegate = self

       DispatchQueue.main.async {
           self.addChild(SwiftFlutterBridge.shared.flutterViewController)
           self.view.addSubview(SwiftFlutterBridge.shared.flutterViewController.view)
           SwiftFlutterBridge.shared.flutterViewController.view.frame = self.view.bounds
           SwiftFlutterBridge.shared.flutterViewController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
       }

• 原生向flutter发送信息

    func sendMessageToFlutter(message: Any) {
       if let messageChannel = basicMessageChannel {
           messageChannel.sendMessage(message)
       }
   }

Flutter

Flutter这边的方法是使用工厂模式将EventChannel、BasicMessageChannel、MethodChannel写在了flutter_bridge_manager.dart文件里

• 向原生发送信息

    // 这个字典紧紧是为了举个例子
    Map<String, dynamic> map = {"name": listTitleArray[index], "arguments": "test"};

    MethodChannelManager.instance.methodChannel
        .invokeMethod(listTitleArray[index], map);

• 接收native发来的信息

    BasicMessageChannelManager.instance.basicMessageChannel.setMessageHandler((message) async {
      Map map = json.decode(message);
      print('basicMessageMethod:' + '$map');
    });

参考链接

• Upgrading Flutter added to existing iOS Xcode project
• Add Flutter to existing app
• MethodChannel、EventChannel