一均芽、Flutter交互初始化

1丘逸、初始化Method Channel，定義交互名：message Method Channel

static const methodChannel = MethodChannel('messageMethodChannel');

2掀宋、flutter發(fā)起原生調(diào)用

methodChannel.invokeMethod(method, arguments);

其中method為調(diào)用原生函數(shù)對應(yīng)key,arguments為傳遞數(shù)據(jù)深纲，可多個任意類型值仲锄；同時返回值為Future<T>，則可通過await或者then進行回調(diào)監(jiān)聽：

HiChannel.invokeMethod(HiChannel.PERMISSION, {
'permissions': [HiPremissionKey.ACCESS_FINE_LOCATION]
}).then((value) {
  if (value) {
    homeIsLocation(() {
       eventBus.fire(UpdateDataEvent());
       yesCallback();
   }, noCallback);
  }
});

3湃鹊、flutter監(jiān)聽原生調(diào)用

methodChannel.setMethodCallHandler((call) {
  if (call.method == TOAST) {
    toast(call.arguments);
  } else if (call.method == SHOW_LOADING) {
    showLoading();
  } else if (call.method == HIDE_LOADING) {
    hideLoading();
  }
  return Future(() => "接受成功");
});

通過調(diào)用setMethodCallHandler監(jiān)聽原生調(diào)用儒喊，其中call.method為調(diào)用函數(shù)對應(yīng)的key，call.arguments為傳遞數(shù)據(jù)币呵，可為任意類型值怀愧。并原生可監(jiān)聽flutter的回調(diào)；
其中flutter回調(diào)通知原生余赢，通過return Future(() => "接受成功");實現(xiàn)芯义。

二、Android原生相關(guān)

1没佑、Main Activity繼承FlutterActivity類毕贼，并實現(xiàn)configureFlutterEngine函數(shù)：如下：

image.png

其中優(yōu)先初始化調(diào)用監(jiān)聽：

methodChannel = MethodChannel(
    flutterEngine.dartExecutor.binaryMessenger,
    "messageMethodChannel"
)

其中messageMethodChannel為flutter初始化時定義的交互名。

2蛤奢、調(diào)用監(jiān)聽函數(shù)setMethodCallHandler鬼癣，如下：

image.png

通過call.method判斷調(diào)用方法。call.argument<String>("error")獲取flutter傳遞數(shù)值啤贩。調(diào)用完畢后待秃，可通過result.success(value)進行回調(diào)flutter，其中value為任意類型值痹屹。

3章郁、Android原生調(diào)用Flutter函數(shù)代碼

image.png

調(diào)用invokeMethod函數(shù)實現(xiàn)。其中method為調(diào)用函數(shù)key志衍，arguments為傳遞參數(shù)暖庄。并監(jiān)聽Result回調(diào)。通過success獲取楼肪。

三培廓、IOS原生相關(guān)

1、在application中初始化iOS通信

let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
let channel = FlutterMethodChannel(name: "messageMethodChannel", binaryMessenger: controller.binaryMessenger)

2春叫、調(diào)用監(jiān)聽函數(shù)setMethodCallHandler

channel.setMethodCallHandler { (call:FlutterMethodCall, result:@escaping FlutterResult) in
    if (call.method == "sendData") {
       if let dict = call.arguments as? Dictionary<String, Any> {
           let name:String = dict["name"] as? String ?? ""
           let age:Int = dict["age"] as? Int ?? -1
          result(["name":"hello,\(name)","age":age])
      }
   }
}

其中call.method為調(diào)用函數(shù)key肩钠，call.arguments為傳遞參數(shù)值。并且通過result(value)進行回調(diào)暂殖，value為任意類型參數(shù)价匠。

3、IOS原生主動向Flutter發(fā)送數(shù)據(jù)

channel.invokeMethod(method, arguments:args)