Flutter Search bar not refreshing the initial list - flutter

Question

i'm having a little trouble in getting back the initial list in my app, after searching an item.
I have a list car and i'm using code from tutorials, if i let the text in the formfield and change tabs, when i back the filter continues and the bar is empty.
I already tried 100 forms and keeps getting the same result.
Here's parts of the code.
List<Car> car = cars;
final _pesquisaController = TextEditingController();
I have a default textformfield with this controller above and a onchange calling the method below.
void pesquisarCarro(String query) {
var carrosPesquisados = {
...car.where(
(cars) {
var nomedoCarro = cars.nomeCarro.toLowerCase();
var input = query.toLowerCase();
return nomedoCarro.contains(input);
},
),
...car.where(
(cars) {
var codigodoCarro = cars.codigo.toLowerCase();
var input = query.toLowerCase();
return codigodoCarro.contains(input);
},
)
}.toList();
setState(
() {
cars = carrosPesquisados;
},
);
}
Already tried putting the list on the initState but not work, can someone give me a light?
Like said, the search filters perfectly, the problem is when i let text in the form and change tabs in the bottomtabbar.

Answer 1

is your problem is initial value always empty?
#override
void initState() {
onInit();
super.initState();
WidgetsBinding.instance.addPostFrameCallback((callback) {
// set your list here
});
}