这是需要存在
lowtohighhightolow在主页上有
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:get/get.dart';
class Filteration extends GetxController {
RxBool show = false.obs;
Stream<QuerySnapshot> Detabase =
FirebaseFirestore.instance.collection('Detabase').snapshots();
Stream<QuerySnapshot> filterDatabase(int minPrice, int maxPrice) {
return FirebaseFirestore.instance
.collection('Detabase')
.where('expectedrent', isGreaterThanOrEqualTo: minPrice)
.where('expectedrent', isLessThanOrEqualTo: maxPrice)
.snapshots();
// ignore: dead_code
Stream<QuerySnapshot>? increment() {
if (show == false) {
return FirebaseFirestore.instance.collection('Detabase').snapshots();
} else {
return Detabase;
}
}
LowtoHigh() async {
if (show == true) {
Detabase = filterDatabase(1000, 100);
}
}
HightoLow() {
Detabase = filterDatabase(100, 1000);
}
handerdtofour() {
Detabase = filterDatabase(100, 100);
}
}
}
这是主页，我想将这些功能中的任何一个放在这个主页中，主要是任何按钮的onPressed。
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get/get_core/src/get_main.dart';
import 'package:realstate/home%20page/addingpage.dart';
import 'package:realstate/home%20page/inkwall.dart';
import '../account page/account page.dart';
import 'filter_model.dart';
class Home extends StatefulWidget {
const Home({Key? key}) : super(key: key);
@override
State<Home> createState() => _HomeState();
}
class _HomeState extends State<Home> {
Stream<QuerySnapshot>? changer;
double padding = 10;
final Filteration c = Get.find();
// bool show = false;
// Stream<QuerySnapshot>? Detabase =
// FirebaseFirestore.instance.collection('Detabase').snapshots();
// Stream<QuerySnapshot> filterDatabase(int minPrice, int maxPrice) {
// return FirebaseFirestore.instance
// .collection('Detabase')
// .where('expectedrent', isGreaterThanOrEqualTo: minPrice)
// .where('expectedrent', isLessThanOrEqualTo: maxPrice)
// .snapshots();
// }
// Stream<QuerySnapshot>? increment() {
// if (show == false) {
// return FirebaseFirestore.instance.collection('Detabase').snapshots();
// } else {
// return Detabase;
// }
// }
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
backgroundColor: Color.fromARGB(117, 53, 52, 52),
appBar: AppBar(
centerTitle: true,
title: const Text(
"Home",
style: TextStyle(
color: Colors.black,
fontFamily: 'Montserrat',
fontWeight: FontWeight.bold,
fontSize: 32),
),
leading: IconButton(
icon: Icon(
Icons.add_business_sharp,
color: Colors.black,
size: 26,
),
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => Addingpage()));
},
),
backgroundColor: Colors.white,
actions: [
IconButton(
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => AccountPage()));
},
icon: const Icon(
Icons.account_circle,
),
color: Colors.black,
highlightColor: Colors.transparent,
focusColor: Colors.transparent,
hoverColor: Colors.transparent,
splashColor: Colors.transparent,
)
],
),
body: Padding(
padding: const EdgeInsets.only(right: 21, left: 20),
child: ThePoster(),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
showModalBottomSheet(
context: context,
builder: (context) {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {},
child: Text("test"),
),
),
),
],
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {},
child: Text("test"),
),
),
),
],
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {},
child: Text("test"),
),
),
),
],
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {
},
child: Text("test"),
),
),
),
],
),
],
);
},
);
},
),
));
}
}
有谁知道这个答案吗？
请告诉我你的解决方案
我的解决方案（并不完美，但可能有效）：
在您的 GetXController 中：
class FilterationController extends GetxController {
bool _show = false;
Stream<QuerySnapshot> _db =
FirebaseFirestore.instance.collection('Database').snapshots();
Stream<QuerySnapshot> db => _db;
bool show => _show;
setShow(bool value){
_show = value;
update(); // like notifyListeners or setState
}
setDb(Stream<QuerySnapshot> value){
_db = value;
update();
}
Stream<QuerySnapshot> _filterDatabase(int minPrice, int maxPrice) {
if(_show) {
_db = FirebaseFirestore.instance
.collection('Database')
.where('expectedrent', isGreaterThanOrEqualTo: minPrice)
.where('expectedrent', isLessThanOrEqualTo: maxPrice)
.snapshots();
} else {
_db = FirebaseFirestore.instance.collection('Database').snapshots();
}
update();
}
// What is this for ?
// Stream<QuerySnapshot> increment() {
// if (!_show) {
// return FirebaseFirestore.instance.collection('Database').snapshots();
// } else {
// return _db;
// }
// }
lowtoHigh(){
if (_show) {
_db = _filterDatabase(1000, 100);
update();
}
}
hightoLow() {
_db = _filterDatabase(100, 1000);
update();
}
handerdtofour() {
_db = _filterDatabase(100, 100);
update();
}
}
在您的主页中：
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get/get_core/src/get_main.dart';
import 'package:realstate/home%20page/addingpage.dart';
import 'package:realstate/home%20page/inkwall.dart';
import '../account page/account page.dart';
import 'filter_model.dart';
class Home extends StatefulWidget {
const Home({Key? key}) : super(key: key);
@override
State<Home> createState() => _HomeState();
}
class _HomeState extends State<Home> {
double padding = 10;
@override
Widget build(BuildContext context) {
return GetBuilder<FilterationController>((controller)=> Scaffold(
backgroundColor: Color.fromARGB(117, 53, 52, 52),
appBar: AppBar(
centerTitle: true,
title: const Text(
"Home",
style: TextStyle(
color: Colors.black,
fontFamily: 'Montserrat',
fontWeight: FontWeight.bold,
fontSize: 32),
),
leading: IconButton(
icon: Icon(
Icons.add_business_sharp,
color: Colors.black,
size: 26,
),
onPressed: () {
//******Call function like this
controller.handerdtofour();
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => Addingpage()));
},
),
backgroundColor: Colors.white,
actions: [
IconButton(
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => AccountPage()));
},
icon: const Icon(
Icons.account_circle,
),
color: Colors.black,
highlightColor: Colors.transparent,
focusColor: Colors.transparent,
hoverColor: Colors.transparent,
splashColor: Colors.transparent,
)
],
),
body: Padding(
padding: const EdgeInsets.only(right: 21, left: 20),
//********Example: Call db here*******, then manage snapshot states: eg. snapshot.hasData...
child: StreamBuilder(stream:controller.db, (ctx,snapshot)=> ThePoster()),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
showModalBottomSheet(
context: context,
builder: (context) {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {},
child: Text("test"),
),
),
),
],
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {},
child: Text("test"),
),
),
),
],
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {},
child: Text("test"),
),
),
),
],
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.only(
top: 25,
bottom: padding,
left: padding,
right: padding,
),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.09,
width: MediaQuery.of(context).size.width * 0.20,
child: OutlinedButton(
style: ButtonStyle(),
onPressed: () {
},
child: Text("test"),
),
),
),
],
),
],
));
},
);
},
),
);
}
}
创建此文件：
class GlobalBindings implements Bindings {
@override
void dependencies() {
Get.lazyPut<FilterationController>(() => FilterationController(),fenix: true);
}
}
在main.dart中添加：
void main() async {
.....
GlobalBindings().dependencies();
runApp(MyApp());
.....
}
将您的主页附加到 main.dart：
......
MaterialApp(
debugShowCheckedModeBanner: false,
home: Home(),
)
.......