Flutter - 如何使用安装在 GetX 中

Question

I initiate.network request in GetXController, after.network call back, I should judge this controller/this page is dealloc or not. If this page is not dealloced, update Page. If this page is dealloced, I do noting. As I know, I can write below codes in flutter origin:

if (mounted) {
   // update page
   setState({
   });
}

So my question is how to write in GetX controller?

Answer 1

There is a property called isClosed in GetxController so you can use it instead of mounted

class MyController extends GetxController{
...
  fun() {
    // some code
    if(this.isClosed) return;
    // code that you want not execute it
  }
...
}

Answer 2

mounted can only be called inside Stateful widgets, so you can't use it inside a Controller.

If you are using named routes I think you can get the current name of the page and do something.

if(Get.routing.current == "/home"){
   doSomething();
}

Answer 3

the mounted bool is specific only for the StateFulWidget , I could think of passing it as a Stream<bool> to the controller, then use it, But , this is not the ideal solution and it can be very problematic.

On the other hand, you can check on mounted before calling the method, like this:

   // ....
   onPressed: () {
      if (mounted) {
        controller.sendRequest();
      }
    },
    // ....