Flutter Getx 状态管理、 多页面数据共享

class CountController extends GetxController{
    RxInt count=0.obs;

    void increment(){
      count.value++;
      update();
    }
}

//创建控制器实例
CountController countController = Get.put(CountController());

body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Obx(() => Text("${countController.count}",
                style: TextStyle(fontSize: 80))),
            ElevatedButton(
                onPressed: () {
                  countController.increment(); 
                },
                child: const Text("计数器 + 1")),
            ElevatedButton(
                onPressed: () {
                  Get.toNamed("/cart", arguments: {"id": 123});
                },
                child: const Text("跳转到cart"))
          ],
        ),
      ),

//获取计数器实例
Controller controller = Get.find();