当我在Flutter中单击TextField()时，有一个问题是重建

Question

我的代码包括FutureBuilder()，它从Firestore获取数据，它的子窗口小部件包括GridView.builder和TextField窗口小部件等。

当我单击TexField(焦点(时，FutureBuilder中的代码将重新生成。

以下是此的测试代码。

你能告诉我这个问题的原因和解决办法吗？

class TestRoom extends StatefulWidget {
TestRoom({Key? key}) : super(key: key);
@override
State<TestRoom> createState() => _TestRoomState();
}
class _TestRoomState extends State<TestRoom> {
List<RoomModel> _roomModels = [];
TextEditingController _textEditingController = TextEditingController();
bool _isTablet = false;
@override
void dispose() {
_textEditingController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
Size size = MediaQuery.of(context).size;
if (size.width >= 800) {
_isTablet = true;
} else {
_isTablet = false;
}
return Scaffold(
appBar: AppBar(),
body: Padding(
padding: EdgeInsets.all(20),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
"Test",
style: TextStyle(
fontSize: 35,
fontWeight: FontWeight.bold,
),
),
SizedBox(
height: 20,
),
FutureBuilder(
future: _getAllRoom(),
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return const Center(
child: CircularProgressIndicator(),
);
}
return Expanded(
child: TestList1(
isTablet: _isTablet,
roomModels: _roomModels,
isListStyle1: true,
));
},
),
],
),
),
);
}
// get user's models from firestore
Future _getAllRoom() async {
_roomModels.clear();
_roomModels.addAll(await RoomService().getAllRoomModel("userName"));
}
}
//
//
class TestList1 extends StatefulWidget {
final isTablet;
final List<RoomModel> roomModels;
final bool isListStyle1;
TestList1({
Key? key,
required this.isTablet,
required this.roomModels,
required this.isListStyle1,
}) : super(key: key);
@override
State<TestList1> createState() => _TestList1State();
}
class _TestList1State extends State<TestList1> {
TextEditingController _textEditingController = TextEditingController();
double _paddingSize = 40.0;
@override
void dispose() {
// _textEditingController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return GridView.builder(
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: widget.isTablet ? 6 : 3,
childAspectRatio: 1 / 1.5,
mainAxisSpacing: _paddingSize,
crossAxisSpacing: 10,
),
itemBuilder: (context, index) {
return _buildMyRooms(widget.roomModels[index], index);
},
itemCount: widget.roomModels.length,
);
}
Widget _buildMyRooms(RoomModel roomModel, int index) {
return Column(
children: [
InkWell(
onTap: () {},
child: Container(
width: 120,
height: 168,
decoration: BoxDecoration(
color: Colors.white,
border: Border.all(
color: Colors.blue,
width: 2.0,
),
borderRadius: const BorderRadius.all(
Radius.circular(10),
),
),
),
),
SizedBox(
height: sm_padding,
),
PopupMenuButton<int>(
color: Colors.grey[100],
itemBuilder: (context) => _fileMenuItemLust(roomModel),
onSelected: _onSeletedFileMenu,
child: Column(
children: [
Container(
width: 130,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Flexible(
child: Text(
roomModel.roomName,
overflow: TextOverflow.ellipsis,
maxLines: 1,
style: const TextStyle(
color: Colors.blue,
fontSize: 15,
),
),
),
const Icon(
Icons.arrow_drop_down_outlined,
color: Colors.blue,
),
],
),
),
],
),
)
],
);
}
// 파일 메뉴 아이템
List<PopupMenuEntry<int>> _fileMenuItemLust(RoomModel roomModel) {
_textEditingController.text = roomModel.roomName;
return [
// 파일명
PopupMenuItem(
enabled: false,
// TODO textfield
child: TextField(
controller: _textEditingController,
style: const TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold,
),
maxLines: 1,
decoration: InputDecoration(
border: _textFieldBorder(),
enabledBorder: _textFieldBorder(),
disabledBorder: _textFieldBorder(),
focusedBorder: _textFieldBorder(),
focusColor: Colors.white60,
filled: true,
fillColor: Colors.grey.withOpacity(0.3),
isDense: true, // padding 조절을 위해 추가
contentPadding: EdgeInsets.all(sm_padding),
)),
),
const PopupMenuDivider(),
PopupMenuItem(
value: 0,
child: Row(
children: [
const Icon(
Icons.copy,
),
SizedBox(
width: sm_padding,
),
const Text(
"Menu Item1",
),
],
),
),
];
}
void _onSeletedFileMenu(value) {}
OutlineInputBorder _textFieldBorder() {
return OutlineInputBorder(
borderRadius: BorderRadius.all(Radius.circular(20)),
borderSide: BorderSide(
color: Colors.grey.withOpacity(0.3),
width: 1,
),
);
}
}

//==========================

我根据叶辛·谢赫的回答修改了代码。现有的问题已经解决了，但又出现了一个新的问题。

我将使用TextField的onSubmitted((更新Firestore，然后使用流生成器和未来生成器更新我的列表。

这是上面代码的一个修改部分，用于解决存在的问题

class _TestRoomState extends State<TestRoom> {
late final myFuture = _getAllRoom(); // new
FutureBuilder(
future: myFuture, //_getAllRoom(), // change

根据焦点不断重建文本字段的问题已经消失，但存在一个问题，即getAllRoom((只在第一次调用，之后无法调用，因此无法更新新的房间列表。

Answer 1

这里future: _getAllRoom()在每次状态更改时调用api。

为未来创建状态变量

late final myFuture  =  _getAllRoom();
@override
Widget build(BuildContext context) {

并使用

FutureBuilder(
future:myFuture  ,

您可以查看修复常见的FutureBuilder和StreamBuilder问题