我的 View 层中有这个语句
TextEditingController controllerDestino = TextEditingController();
我想恢复这个 controllerDestino,以在我的 Controller 层中的方法中使用。 statusUberNaoChamado() {
showBoxAdress = true;
changeMainButton("Chamar", Color(0xFF1ebbd8), () {
callUber("I need pass the controller here");
});
update();}
预先感谢您的关注:)
最佳答案
将 TextEditingController 定义/实例化为您用来控制表单/实现业务逻辑的 GetxController 中的字段。
class DestinoFormControllerX extends GetxController {
static DestinoFormControllerX get i => Get.find();
final GlobalKey<FormBuilderState> key = GlobalKey<FormBuilderState>();
// ↓ place the text editing controller inside your... controller :)
var controllerDestino = TextEditingController();
并在 GetxController 中任何需要的地方使用 TextEditingController 值 void resetForm() {
key.currentState.reset();
controllerDestino.text = '';
focusNode.requestFocus();
}
在您的 View 层中,注入(inject)您的 GetxController,并获取文本编辑 Controller 并访问您需要的任何其他方法/字段。class DestinoForm extends StatelessWidget {
final void Function() submitHandler;
DestinoForm({this.submitHandler});
@override
Widget build(BuildContext context) {
final dcx = Get.put(DestinoFormControllerX());
// ↑ inject GetxController, be careful to put *inside* build method
return FormBuilder(
key: dcx.key,
child: Column(
children: [
FormBuilderTextField(
name: 'destino',
controller: dcx.controllerDestino,
decoration: InputDecoration(
labelText: 'Destino',
),
大多数表单都有重置和提交按钮。在那里您可以调用 GetxController 上的方法.... actions: [
FlatButton(
child: Text('Reset'),
onPressed: () => DestinoFormControllerX.i.resetForm(),
),
边注如果您正在使用
Get.put()
在您的表单小部件中实例化/注入(inject)您的 GetxController , 这样做 内build
方法 您的表单小部件。否则,您可能会收到
TextEditingController
电话 setState
在不再安装在小部件树中的 StatefulWidget(文本字段)上:════════ Exception caught by foundation library ════════════════════════════════════════════════════
The following assertion was thrown while dispatching notifications for TextEditingController:
setState() called after dispose(): _FormBuilderTextFieldState#96390(lifecycle state: defunct, not mounted)
好的class DestinoForm extends StatelessWidget {
final void Function() submitHandler;
DestinoForm({this.submitHandler});
@override
Widget build(BuildContext context) {
final dcx = Get.put(DestinoFormControllerX());
// ↑ inject GetxController, be careful to put *inside* build method
坏的class DestinoForm extends StatelessWidget {
final void Function() submitHandler;
final dcx = Get.put(DestinoFormControllerX());
// ↑ wrong place, DestinoFormControllerX gets linked to previous route
DestinoForm({this.submitHandler});
@override
Widget build(BuildContext context) {
More detail on Github ,提到 GetX 的正确注入(inject)/使用。
关于flutter - 如何使用 Getx 在 Controller 层内检索 TextEditingController?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/65912295/