Flutter GetX: Where Does Get.put Go in a Widget?-CodePudding

I am new to GetX and am trying to learn how to use it. I have read different tutorials that inject the controller outside of the widget's build method, and others that put it inside it.

class MyWidget extends StatelessWidget{
  const MyWidget({Key? key}) : super(key:key);

  //Outside...
  final controller = Get.put(Controller()); //<---

  @override
  Widget build(BuildContext context) {
    //Inside...
    final controller = Get.put(Controller()); //<---

    return Obx(
      () => Text(controller.name)
    );
  }
}

Is there a difference between those two locations? If so, why?

Also, where should it go in a StatefulWidget? It seems it should not go inside the build method because it causes a stack overflow error for me.

Does the location of Get.put() matter inside a widget?

CodePudding user response：

The normal way is to put the controller outside the widget, so it will be created once. if you but it inside the widget a new instance of the controller will be created each time you refresh (update) the widget. Also, with GetX there is no need to use StatefulWidget.

CodePudding user response：

When you put it inside the build method, it will create a new instance every time the widget is rebuilt, so it is better to but it outside and in most cases I think you do not need to use StatefulWidgetwith GetX even in animation.