Flutter选择器插件selectpicker的使用
Flutter选择器插件selectpicker的使用
特性
简单的方式来为用户提供预定义选项的选择器。
图片
开始使用
只需导入包。
import 'package:selectpicker/selectpicker.dart';
然后将列表转换为SelectPickerItem列表，并调用SelectPicker。
SelectPicker(
hint: "选择一个项目",
list: [
SelectPickerItem("项目1", "1", null),
SelectPickerItem("项目1", "2", null),
SelectPickerItem("项目1", "3", null),
],
selectFirst: true,
showId: true,
onSelect: (value) {
if (mounted) {
ScaffoldMessenger.of(context).clearSnackBars();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(value.title.toString())));
}
},
hintSearch: "按项目描述或ID搜索",
selectPickerInputStyle: SelectPickerInputStyle(),
)
示例
这是一个包含使用示例的简单屏幕。
import 'package:flutter/material.dart';
import 'package:selectpicker/models/select_picker_item.dart';
import 'package:selectpicker/selectpicker.dart';
import 'package:selectpicker/styles/input_style.dart';
class Tela extends StatefulWidget {
const Tela({super.key});
[@override](/user/override)
State<Tela> createState() => _TelaState();
}
class _TelaState extends State<Tela> {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("SelectPicker", style: TextStyle(color: Colors.white)),
backgroundColor: Colors.blue,
),
body: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: SelectPicker(
hint: "选择一个州",
list: getStatesPicker(),
selectFirst: false,
onSelect: (value) {
ScaffoldMessenger.of(context).clearSnackBars();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(value.title.toString())));
},
hintSearch: "按州描述或ID搜索",
selectPickerInputStyle: SelectPickerInputStyle(),
initialItem: "DF",
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: SelectPicker(
hint: "选择一个项目",
list: [
SelectPickerItem("项目1", "1", null),
SelectPickerItem("项目1", "2", null),
SelectPickerItem("项目1", "3", null),
],
selectFirst: true,
showId: true,
onSelect: (value) {
if (mounted) {
ScaffoldMessenger.of(context).clearSnackBars();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(value.title.toString())));
}
},
hintSearch: "按项目描述或ID搜索",
selectPickerInputStyle: SelectPickerInputStyle(),
),
),
],
),
);
}
static List<Uf> getUf() {
List<Uf> list = [];
list.add(Uf("阿克雷", "AC"));
list.add(Uf("阿拉戈斯", "AL"));
list.add(Uf("阿马帕", "AP"));
list.add(Uf("亚马逊", "AM"));
list.add(Uf("巴伊亚", "BA"));
list.add(Uf("塞阿拉", "CE"));
list.add(Uf("埃斯皮里图桑托", "ES"));
list.add(Uf("戈亚斯", "GO"));
list.add(Uf("马拉尼昂", "MA"));
list.add(Uf("马托格罗索", "MT"));
list.add(Uf("马托格罗索州", "MS"));
list.add(Uf("米纳斯吉拉斯", "MG"));
list.add(Uf("帕拉", "PA"));
list.add(Uf("帕拉伊巴", "PB"));
list.add(Uf("巴拉那", "PR"));
list.add(Uf("伯南布哥", "PE"));
list.add(Uf("皮奥伊", "PI"));
list.add(Uf("里约热内卢", "RJ"));
list.add(Uf("里约格兰德州", "RN"));
list.add(Uf("南里奥格兰德", "RS"));
list.add(Uf("朗多尼亚", "RO"));
list.add(Uf("罗赖马", "RR"));
list.add(Uf("圣卡塔琳娜", "SC"));
list.add(Uf("圣保罗", "SP"));
list.add(Uf("塞尔希培", "SE"));
list.add(Uf("托坎廷斯", "TO"));
list.add(Uf("联邦区", "DF"));
return list;
}
static List<SelectPickerItem> getStatesPicker() {
try {
List<SelectPickerItem> list = [];
for (Uf item in getUf()) {
list.add(SelectPickerItem(item.name, item.uf, item));
}
return list;
} catch (error) {
return [];
}
}
}
class Uf {
Uf(this.name, this.uf);
String name;
String uf;
}
更多关于Flutter选择器插件selectpicker的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter选择器插件selectpicker的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
selectpicker 是一个用于 Flutter 的插件，可以帮助你实现一个自定义的选择器，类似于下拉菜单或对话框选择器。它允许用户从多个选项中选择一个或多个值。以下是如何使用 selectpicker 的基本步骤：
1. 添加依赖
首先，你需要在 pubspec.yaml 文件中添加 selectpicker 插件的依赖：
dependencies:
flutter:
sdk: flutter
selectpicker: ^1.0.0 # 请检查最新版本
然后运行 flutter pub get 来获取依赖。
2. 导入插件
在你的 Dart 文件中导入 selectpicker 插件：
import 'package:selectpicker/selectpicker.dart';
3. 使用 SelectPicker
你可以使用 SelectPicker 来创建一个选择器。以下是一个简单的示例：
import 'package:flutter/material.dart';
import 'package:selectpicker/selectpicker.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('SelectPicker Example')),
body: Center(
child: SelectPickerExample(),
),
),
);
}
}
class SelectPickerExample extends StatefulWidget {
[@override](/user/override)
_SelectPickerExampleState createState() => _SelectPickerExampleState();
}
class _SelectPickerExampleState extends State<SelectPickerExample> {
String? selectedValue;
[@override](/user/override)
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text('Selected Value: $selectedValue'),
SizedBox(height: 20),
ElevatedButton(
onPressed: () {
_showSelectPicker(context);
},
child: Text('Open SelectPicker'),
),
],
);
}
void _showSelectPicker(BuildContext context) async {
final result = await SelectPicker.showPicker(
context: context,
title: 'Select an Option',
items: ['Option 1', 'Option 2', 'Option 3'],
);
setState(() {
selectedValue = result;
});
}
}