Flutter GetX-GetxController使用

GetxController

In the actual project development process, it is impossible for us to process the UI code and business logic together, which will be fatal to the project structure, code readability, and later maintenance. Fortunately, it provides us GetXwith GetxController, GetxControllerthe main function is to separate UI code from business logic.

Three ways to use GetxController

import 'package:flutter_getx_example/ObxCustomClassExample/Teacher.dart';
import 'package:get/get.dart';

class MyController extends GetxController {

  // 第一种
  // var teacher = Teacher();
  //
  // void convertToUpperCase() {
  //   teacher.name.value = teacher.name.value.toUpperCase();
  // }

  // 第二种
  // var teacher =  Teacher(name: "kwok", age: 18).obs;
  // void convertToUpperCase() {
  //   teacher.update((val) {
  //     teacher.value.name = teacher.value.name.toString().toUpperCase();
  //   });
  // }

  // 第三种
  var teacher = Teacher();

  void convertToUpperCase() {
    teacher.name.value = teacher.name.value.toUpperCase();
    update();
  }
}

Instantiate the controller and use

import 'package:flutter/material.dart';
import 'package:flutter_getx_example/GetXControllerExample/MyController.dart';
import 'package:get/get.dart';

class GetXControllerExample extends StatelessWidget {

  // 第一种
  MyController myController = Get.put(MyController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("GetX Obx---GetXController"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            // 第一种
            // Obx(() => Text(
            //   "我的名字是 ${myController.teacher.name}",
            //   style: TextStyle(color: Colors.red, fontSize: 30),
            // )),
            // 第二种
            // GetX<MyController>(
            //   init: MyController(),
            //   builder: (controller) {
            //     return Text(
            //       "我的名字是 ${controller.teacher.name}",
            //       style: TextStyle(color: Colors.green, fontSize: 30),
            //     );
            //   },
            // ),
            // 第三种
            GetBuilder<MyController>(
              init: myController,
              builder: (controller) {
                return Text(
                  "我的名字是 ${controller.teacher.name}",
                  style: TextStyle(color: Colors.green, fontSize: 30),
                );
              },
            ),
            SizedBox(height: 20,),
            ElevatedButton(
              onPressed: () {
                // 第一种
                myController.convertToUpperCase();

                // 第二种
                // Get.find<MyController>().convertToUpperCase();

              },
              child: Text("转换为大写"))
          ],
        ),
      ),
    );
  }
}