string - 如何将未来的字符串设置为 TextFormField 的“初始值”
问题描述
大家好我是初学者。我面临一个问题。下面是我的代码。我想将 Future String 设置为 TextFormField 的初始值。我只为一个 TextFormField 成功完成了此操作，但现在我有多个 TextFormField，我尝试从 firebase 文档的每个字段中获取数据并将其设置为相应 TextFormField 的初始值。
如果我将值分配给 TextFormField“标签”，它会正确显示，但是当我将相同的值分配给“初始值”时，它不会显示。抱歉谈话不佳
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:shop_app/components/custom_surfix_icon.dart';
import 'package:shop_app/components/default_button.dart';
import 'package:shop_app/components/form_error.dart';
import 'package:shop_app/size_config.dart';
import '../../../../../../constants.dart';
class EditProfileForm extends StatefulWidget {
@override
_EditProfileFormState createState() => _EditProfileFormState();
}
class _EditProfileFormState extends State<EditProfileForm> {
final _formKey = GlobalKey<FormState>();
final List<String> errors = [];
String name;
String phoneNo;
String gender;
String address;
String about;
String education;
String specialities;
String languages;
String work;
String storeName;
String storePhoneNo;
String storeGender;
String storeAddress;
String storeAbout;
String storeEducation;
String storeSpecialities;
String storeLanguages;
String storeWork;
static const menuItems = <String>[
'Male',
'Female',
'Other',
];
final List<DropdownMenuItem<String>> popUpMenuItem = menuItems
.map((String value) => DropdownMenuItem<String>(
value: value,
child: Text(value),
))
.toList();
void addError({String error}) {
if (!errors.contains(error))
setState(() {
errors.add(error);
});
}
void removeError({String error}) {
if (errors.contains(error))
setState(() {
errors.remove(error);
});
}
// @override
// void initState() {
// super.initState();
// getData();
// }
getData() {
getName();
getPhoneNo();
getAddress();
getAbout();
getEducation();
getSpecialities();
getLanguages();
getWork();
}
@override
Widget build(BuildContext context) {
return Form(
key: _formKey,
child: Column(
children: [
getNameFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getGenderFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getPhoneNoFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getAddressFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getAboutFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getEducationFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getSpecialitiesFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getLanguagesFormField(),
SizedBox(height: getProportionateScreenHeight(30)),
getWorkFormField(),
FormError(errors: errors),
SizedBox(height: getProportionateScreenHeight(40)),
DefaultButton(
text: "Update Profile",
press: () async {
if (_formKey.currentState.validate()) {
print(storeName);
}
},
),
],
),
);
}
///////////////////////////////////////////////////////////////////////////////
Widget getNameFormField() {
return FutureBuilder(
future: getName(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot) {
storeName = snapshot.data;
return TextFormField(
initialValue: storeName,
onSaved: (newValue) => name = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kNamelNullError);
}
name = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kNamelNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: storeName,
hintText: "Enter your name",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/User.svg"),
),
);
},
);
}
Future<String> getName() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getName = document['Name'];
return getName;
}
///////////////////////////////////////////////////////////////////////////////
Widget getPhoneNoFormField() {
return FutureBuilder(
future: getPhoneNo(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot1) {
storePhoneNo = snapshot1.data;
return TextFormField(
initialValue: storePhoneNo,
onSaved: (newValue) => phoneNo = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kPhoneNumberNullError);
}
phoneNo = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kPhoneNumberNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Phone No",
hintText: "Enter Phone No",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/Phone.svg"),
),
);
},
);
}
Future<String> getPhoneNo() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getPhoneNo = document['Phone Number'];
return getPhoneNo;
}
///////////////////////////////////////////////////////////////////////////////
DropdownButtonFormField getGenderFormField() {
return DropdownButtonFormField(
onSaved: (newValue) {
gender = newValue;
},
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kNamelNullError);
}
gender = value;
print(gender);
},
validator: (value) {
if (value.isEmpty) {
addError(error: kNamelNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Gender",
hintText: "Select your gender",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/gender.svg"),
),
items: popUpMenuItem,
);
}
Future<String> getGender() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getGender = document['Gender'];
return getGender;
}
///////////////////////////////////////////////////////////////////////////////
Widget getAddressFormField() {
return FutureBuilder(
future: getAddress(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot2) {
storeAddress = snapshot2.data;
return TextFormField(
initialValue: storeAddress,
onSaved: (newValue) => address = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kAddressNullError);
}
address = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kAddressNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Address",
hintText: "Enter your address",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/Location point.svg"),
),
);
},
);
}
Future<String> getAddress() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getName = document['Address'];
return getName;
}
///////////////////////////////////////////////////////////////////////////////
Widget getAboutFormField() {
return FutureBuilder(
future: getAbout(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot3) {
storeAbout = snapshot3.data;
return TextFormField(
initialValue: storeAbout,
onSaved: (newValue) => about = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kAboutNullError);
}
about = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kAboutNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "About",
hintText: "Describe Yourself",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/User.svg"),
),
);
},
);
}
Future<String> getAbout() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getAbout = document['About'];
return getAbout;
}
///////////////////////////////////////////////////////////////////////////////
Widget getEducationFormField() {
return FutureBuilder(
future: getEducation(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot4) {
storeEducation = snapshot4.data;
return TextFormField(
initialValue: storeEducation,
onSaved: (newValue) => education = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kEducationNullError);
}
education = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kEducationNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Education",
hintText: "Enter your education",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/User.svg"),
),
);
},
);
}
Future<String> getEducation() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getEducation = document['Education'];
return getEducation;
}
///////////////////////////////////////////////////////////////////////////////
Widget getSpecialitiesFormField() {
return FutureBuilder(
future: getSpecialities(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot5) {
storeSpecialities = snapshot5.data;
return TextFormField(
initialValue: storeSpecialities,
onSaved: (newValue) => specialities = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kSkillsNullError);
}
specialities = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kSkillsNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Specialities",
hintText: "Enter your specialities",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/User.svg"),
),
);
},
);
}
Future<String> getSpecialities() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getSpecialities = document['Specialities'];
return getSpecialities;
}
///////////////////////////////////////////////////////////////////////////////
Widget getLanguagesFormField() {
return FutureBuilder(
future: getLanguages(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot6) {
storeLanguages = snapshot6.data;
return TextFormField(
initialValue: storeLanguages,
onSaved: (newValue) => languages = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kLanguagesNullError);
}
languages = value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kLanguagesNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Languages",
hintText: "Enter Your Languages",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/User.svg"),
),
);
},
);
}
Future<String> getLanguages() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getLanguages = document['Languages'];
return getLanguages;
}
///////////////////////////////////////////////////////////////////////////////
Widget getWorkFormField() {
return FutureBuilder(
future: getWork(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot7) {
storeWork = snapshot7.data;
return TextFormField(
initialValue: storeWork,
onSaved: (newValue) => work = newValue,
onChanged: (value) {
if (value.isNotEmpty) {
removeError(error: kWorkNullError);
}
work= value;
},
validator: (value) {
if (value.isEmpty) {
addError(error: kWorkNullError);
return "";
}
return null;
},
decoration: InputDecoration(
labelText: "Work",
hintText: "What you do?",
floatingLabelBehavior: FloatingLabelBehavior.always,
suffixIcon: CustomSurffixIcon(svgIcon: "assets/icons/User.svg"),
),
);
},
);
}
Future<String> getWork() async {
DocumentSnapshot document = await FirebaseFirestore.instance
.collection('Users')
.doc(FirebaseAuth.instance.currentUser.email)
.get();
String getWork = document['Work'];
return getWork;
}
}
解决方案
您可以在 initState() 中调用返回 Future 字符串的函数，之后，您可以将该字符串设置为 TextInput 提示
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