Flutter iOS 与 flutter 相互通信

在混合开发中避免不了通信，简单记录一下，Flutter iOS工程与Flutter 之间相互通信。
Flutter中通过Platform Channel实现Flutter和原生端的数据传递，是怎么进行数据通信，以及怎么配置，下面一一进行详解。

• FlutterMethodChannel 使用
  注：iOS 端简单设置

class HYFlutterNavChannel: NSObject {@objc public static let share = HYFlutterNavChannel()// 声明 FlutterMethodChannelvar channel: FlutterMethodChannel// lazy var map: [String: (_ call: FlutterMethodCall, _ result: FlutterResult) -> Void] = {return ["pop":pop,]}()override init() {// name 一定需要和  flutter里面约定好，保持一致channel = FlutterMethodChannel.init(name: "Flutter/navigation", binaryMessenger: FlutterBoost.instance().engine().binaryMessenger)super.init()channel.setMethodCallHandler {[weak self] (call, reslt) inlet method = self?.map[call.method]method?(call, reslt)}}@objc public static func start() {_ = HYFlutterNavChannel.share}// popfunc pop(call: FlutterMethodCall, result: FlutterResult)  {UINavigationController.topNavigationController()?.navigationController?.popViewController(animated: true)}}

在iOS 注册Flutter 引擎的地方使用

// 案例是放到 AppDelegate中
[FlutterBoost.instance setup:application delegate:delegate callback:^(FlutterEngine *engine) {NSLog(@"FlutterBoost 开始操作");// 使用 MethodChannel[HYFlutterNavChannel start];[HYFlutterCommonChannel start];}];

上述就把iOS端，使用FlutterMethodChannel简单进行通信集成完毕。

• Flutter 端 MethodChannel 集成与使用

import 'dart:collection';import 'package:flutter/services.dart';class NavigationChannel {// 这里需要和原生保存一致  "Flutter/navigation"// ignore: constant_identifier_namesstatic const MethodChannel channel_navigation =MethodChannel("Flutter/navigation");// ignore: non_constant_identifier_namesstatic final channel_navigation_handlers =HashMap<String, MethodCallHandler>();NavigationChannel() {init();}void init() {channel_navigation_handlers["nativeQuitFlutter"] = nativeQuitFlutter;channel_navigation.setMethodCallHandler((call) async {channel_navigation_handlers[call.method]?.call(call);});}//  native 提供的功能方法Future<void> finishHostPage() async {return channel_navigation.invokeMethod("pop");}Future<void> nativeQuitFlutter(MethodCall call) async {}// -------------flutter提供的功能-----------------void registerInitRoute(MethodCallHandler handler) {channel_navigation_handlers["initRoute"] = handler;}
}typedef MethodCallHandler = Future<dynamic> Function(MethodCall call)?;

以上 Flutter MethodChannel 集成完毕

• Flutter 使用MethodChannel
  这里使用了一个类进行统一管理 通信类

import 'package:my_flutter/common_channel.dart';import 'navigation_channel.dart';class Channels {// ignore: empty_constructor_bodiesChannels._() {}// 注册 Channelstatic final navigation = NavigationChannel();static final common = CommonChannel();
}

在Flutter使用的地方进行调用

Channels.navigation.finishHostPage();

上述完成，flutter就可以调用原生里面注册的pop方法了。