GetX GetBuilder UniqueID

 import "package:flutter/material.dart";

import "package:get/get.dart";
import "package:getx_flutter/GetX_GetBuilder_practice/controller2.dart";

void main() {
  runApp(const MyApp(),);
}
class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      debugShowCheckedModeBanner: false,
      title: "Reactive State Manager",
      theme: ThemeData(
        primarySwatch: Colors.brown,
      ),
      home: AgainReact(),
    );
  }
}
class AgainReact extends StatelessWidget {
  AgainReact({super.key});

  SimpleReact2 simpleController = Get.put(SimpleReact2(),);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Reactive State Manager"),
        centerTitle: true,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            GetBuilder<SimpleReact2>(
              id: "first",
              //init: SimpleReact(), ///Same as the "Get.put(SimpleReact(),);"
              builder: (simpleController) {
                return Text(
                  "${simpleController.count}",
                  style: const TextStyle(fontSize: 30.0,),
                );
              },),
            GetBuilder<SimpleReact2>(
              builder: (simpleController) {
                return Text(
                  "${simpleController.count}",
                  style: const TextStyle(fontSize: 30.0,),
                );
              },
            ),
            ElevatedButton(
              onPressed: () {
                ///If we don't create controller instance initially then we have to find Controller and
                ///Get.find() will give same instance(of Controller) everytime and we can use throughout the app
                var getController = Get.find<SimpleReact2>();
                getController.increment();

                // simpleController.increment();
              },
              child: const Text("Increment"),
            ),
          ],
        ),
      ),
    );
  }
}
///Note:
///When multiple GetBuilder is used at that time using "id:" property, we can update(call) specific
///GetBuilder using Unique id and that "id:" property value will be passed to the update(); method

import "package:get/get.dart";

class SimpleReact2 extends GetxController {
  var count = 0;

  @override
  void onInit() {
    print("onInit() is called...");
    super.onInit();
  }
  void increment() {
    count++;
    update(["first"]);
    // update(["second"]);
  }
  @override
  void onClose() {
    print("onClose() is called...");
    super.onClose();
  }
}