特殊类型的数组GetX如何监听
class NotificationLogic extends GetxController{
///是否开启通知权限
var notificationPermission = false.obs;
///开启了哪几种通知权限
var notificationPermissionList = <NotificationPermission>[].obs;
///可以开启的通知权限
var notificationPermissionCouldAddList = <NotificationPermission>[].obs;
///显示的UI Widget，你可以开启xxx通知提示
var textToShowPermissionCouldAddList = <Widget>[].obs;
}
绑定监听App进入前台后台
WidgetsBindingObserver
