flutter与Ios原生通讯（一）MethodChannel_flutter ios methodchannel

flutter 与 Ios 原生通讯

• MethodChannel

flutter 调用 ios 原生方法，使用 MethodChannel 用于传递方法调用（method invocation）通常用来调用 native 中某个方法

native端

// 注册测试插件方法
func testPlugin(message: FlutterBinaryMessenger) {
    let channel = FlutterMethodChannel(name: "plugin_apple", binaryMessenger: message)
    channel.setMethodCallHandler {
        (call: FlutterMethodCall, result: @escaping FlutterResult) in
        if (call.method == "apple_one") {
            result(["result": "success", "code": 200] as [String : Any])
        }
        if (call.method == "apple_two") {
            result(["result": "success", "code": 404] as [String : Any])
        }
    }
}

在 AppDelegate 中调用：
// ... code
	// 注册新测试方法
    // 挂载到rootview上
      let messager : FlutterBinaryMessenger = window?.rootViewController as!FlutterBinaryMessenger
      
      testPlugin(message: messager);
// ... code 

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Flutter端

  // 调用 apple_one 方法
  Future<void> appleOne() async {
    MethodChannel _channel = const MethodChannel("plugin_apple");
    final result = await _channel.invokeMethod("apple_one");
    Map map = result as LinkedHashMap<Object?, Object?>;
    print("result: ${map["result"]}");
    print("code: ${map["code"]}");
  }

  // 调用 apple_two 方法
  Future<void> appleTwo() async {
    MethodChannel _channel = const MethodChannel("plugin_apple");
    final result = await _channel.invokeMethod("apple_two");
    Map map = result as LinkedHashMap<Object?, Object?>;
    print("result: ${map["result"]}");
    print("code: ${map["code"]}");
  }


   /// 布局
   body: Center(
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: [
           GestureDetector(
             onTap: () {
               appleOne();
             },
             child: const Text("调用方法 apple_one"),
           ),
           const SizedBox(
             height: 10,
           ),
           GestureDetector(
             onTap: () {
               appleTwo();
             },
             child: const Text("调用 apple_two"),
          )
        ],
      ),
    )
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预览

调用会在控制台输出测试