【发布时间】：2021-04-19 18:37:20
【问题描述】：
我有两个表单添加任务和更新任务。
两者都有两个字段名称和描述。当我尝试编辑现有任务时，它不会将值填充到表单中。
这是添加任务对话框
showDialog(
context: context,
builder: (context) {
Size size = MediaQuery.of(context).size;
return Container(
child: AlertDialog(
title: Text(
'Add a new task',
style: TextStyle(
color: Colors.black,
fontSize: 18.0,
),
),
shape: RoundedRectangleBorder(
side: BorderSide(color: primaryColor)),
content: new Container(
width: size.width * 0.25,
height: size.height,
decoration: new BoxDecoration(
shape: BoxShape.rectangle,
color: const Color(0xFFFFFF),
borderRadius:
new BorderRadius.all(new Radius.circular(32.0)),
),
child: StreamBuilder(
stream: bloc.addNewTaskStream,
builder: (context, AsyncSnapshot<dynamic> snapshot) {
if (snapshot.hasData) {
switch (snapshot.data.status) {
case Status.LOADING:
return Loading(
loadingMessage: snapshot.data.message);
break;
case Status.ERROR:
return Error(errorMessage: snapshot.data.message);
}
}
return Form(
key: _formKey,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
// dialog center
new Expanded(
child: new Column(
mainAxisAlignment:
MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.center,
children: <Widget>[
StreamBuilder<String>(
stream: bloc.task,
builder: (context, snapshot) {
return TextFormField(
decoration: InputDecoration(
border: InputBorder.none,
hintText: 'Name'),
validator: (value) {
if (value.isEmpty) {
return 'Please enter the task';
}
return null;
},
onChanged: bloc.changeTask,
);
}),
StreamBuilder<String>(
stream: bloc.description,
builder: (context, snapshot) {
return TextFormField(
decoration: InputDecoration(
border:
InputBorder.none,
hintText:
'Description'),
validator: (value) {
if (value.isEmpty) {
return 'Please enter the description';
}
return null;
},
onChanged:
bloc.changeDescription);
}),
],
),
),
// dialog bottom
new Expanded(
child: Row(
mainAxisAlignment:
MainAxisAlignment.spaceBetween,
crossAxisAlignment:
CrossAxisAlignment.end,
children: <Widget>[
FlatButton(
color: Color(0XFFEFEFEF),
textColor: primaryColor,
disabledColor: Colors.grey,
disabledTextColor: Colors.black,
padding: EdgeInsets.symmetric(
vertical: 15.0,
horizontal: 10.0),
onPressed: () {
Navigator.of(context).pop();
},
child: Text(
"Close",
style: TextStyle(
fontSize: 15.0,
),
),
),
FlatButton(
color: primaryColor,
textColor: Colors.white,
disabledColor: Colors.grey,
disabledTextColor: Colors.black,
padding: EdgeInsets.symmetric(
vertical: 15.0,
horizontal: 10.0),
onPressed: () =>bloc.addTask(_formKey, context),
child: Text(
"Add",
style: TextStyle(
fontSize: 15.0,
),
),
),
],
),
),
],
),
);
}),
),
),
);
});
并更新任务表单
showDialog(
context: context,
builder: (context) {
Size size = MediaQuery.of(context).size;
return Container(
child: AlertDialog(
title: Text(
'Update task',
style: TextStyle(
color: Colors.black,
fontSize: 18.0,
),
),
shape: RoundedRectangleBorder(
side: BorderSide(color: primaryColor)),
content: new Container(
width: size.width * 0.25,
height: size.height,
decoration: new BoxDecoration(
shape: BoxShape.rectangle,
color: const Color(0xFFFFFF),
borderRadius:
new BorderRadius.all(new Radius.circular(32.0)),
),
child: StreamBuilder(
stream: bloc.addNewTaskStream,
builder: (context, AsyncSnapshot<dynamic> snapshot) {
if (snapshot.hasData) {
switch (snapshot.data.status) {
case Status.LOADING:
return Loading(
loadingMessage: snapshot.data.message);
break;
case Status.ERROR:
return Error(errorMessage: snapshot.data.message);
}
}
return Form(
key: _formKey,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
// dialog center
new Expanded(
child: new Column(
mainAxisAlignment:
MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.center,
children: <Widget>[
StreamBuilder<String>(
stream: bloc.task,
builder: (context, snapshot) {
return TextFormField(
decoration: InputDecoration(
border: InputBorder.none,
hintText: 'Name'),
validator: (value) {
if (value.isEmpty) {
return 'Please enter the task';
}
return null;
},
onChanged: bloc.changeTask,
);
}),
StreamBuilder<String>(
stream: bloc.description,
builder: (context, snapshot) {
return TextFormField(
decoration: InputDecoration(
border:
InputBorder.none,
hintText:
'Description'),
validator: (value) {
if (value.isEmpty) {
return 'Please enter the description';
}
return null;
},
onChanged:
bloc.changeDescription);
}),
],
),
),
// dialog bottom
new Expanded(
child: Row(
mainAxisAlignment:
MainAxisAlignment.spaceBetween,
crossAxisAlignment:
CrossAxisAlignment.end,
children: <Widget>[
FlatButton(
color: Color(0XFFEFEFEF),
textColor: primaryColor,
disabledColor: Colors.grey,
disabledTextColor: Colors.black,
padding: EdgeInsets.symmetric(
vertical: 15.0,
horizontal: 10.0),
onPressed: () {
Navigator.of(context).pop();
},
child: Text(
"Close",
style: TextStyle(
fontSize: 15.0,
),
),
),
FlatButton(
color: primaryColor,
textColor: Colors.white,
disabledColor: Colors.grey,
disabledTextColor: Colors.black,
padding: EdgeInsets.symmetric(
vertical: 15.0,
horizontal: 10.0),
onPressed: () =>bloc.updateTask(_formKey, context, selectedTaskId),
child: Text(
"Update",
style: TextStyle(
fontSize: 15.0,
),
),
),
],
),
),
],
),
);
}),
),
),
);
});
点击editTask，我将值添加到sink。
class TimesheetBloc{
TimesheetRepository _timesheetRepository = new TimesheetRepository();
//declare streams
final _addNewTask = BehaviorSubject<Response<String>>();
final _description = BehaviorSubject<String>();
final _task = BehaviorSubject<String>();
final _hours = BehaviorSubject<double>();
//get data from streams
Stream<Response<String>> get addNewTaskStream => _addNewTask.stream;
Stream<String> get description => _description.stream;
Stream<String> get task => _task.stream;
//set data
StreamSink<Response<String>> get addNewTaskSink => _addNewTask.sink;
Function(String) get changeDescription => _description.sink.add;
Function(String) get changeTask => _task.sink.add;
//dispose
dispose(){
_description.close();
_hours.close();
_addNewTask.close();
_task.close();
}
addTask(_formKey, context, DateTime date)async {
if (_formKey.currentState.validate()) {
final description = _description.value;
final task = _task.value;
addNewTaskSink.add(Response.loading('Please wait'));
var data = await _timesheetRepository.addNewTask(task, description);
Map<String, dynamic> message = Map.castFrom(data);
addNewTaskSink.add(Response.completed(message['message']));
Navigator.of(context).pop();
}
}
editTask (context, taskObject) async {
String description = taskObject['description'];
String taskName = taskObject['taskName'];
_task.sink.add(taskName);
_description.sink.add(description);
}
updateTask (_formKey, context, uuid) async {
if (_formKey.currentState.validate()) {
final description = _description.value;
final task = _task.value;
addNewTaskSink.add(Response.loading('Please wait'));
var data = await _timesheetRepository.updateTask(uuid, task, description);
Map<String, dynamic> message = Map.castFrom(data);
addNewTaskSink.add(Response.completed(message['message']));
Navigator.of(context).pop();
}
}
}
这里是 AddTAsk 和 UpdateTask 表单
【问题讨论】：
标签： flutter dart flutter-layout flutter-dependencies flutter-web