Flutter对话框插件kdialogs的使用
Flutter对话框插件kdialogs的使用
实现了一些常用的对话框,用于显示加载指示器、确认消息、内容、错误信息等。本文档提供了项目的概述。
实现:
showKDialogWithLoadingMessage:
显示一个带有消息的加载指示器,并提供一个函数来停止指示器。
final close = await showKDialogWithLoadingMessage(context, message: "加载中,请稍候...");
await Future.delayed(const Duration(seconds: 2));
close();
showKDialogWithLoadingIndicator:
显示一个加载指示器,并提供一个函数来停止指示器。
final close = await showKDialogWithLoadingIndicator(context);
await Future.delayed(const Duration(seconds: 2));
close();
showBottomAlertKDialog:
显示一个底部模态对话框,可以显示错误消息,并提供重试选项,如果采取了重试操作,则返回布尔值 true
。
await showBottomAlertKDialog(context, message: "这是一个错误消息", retryable: true);
showKDialogContent:
允许在对话框中显示内容,并提供各种附加操作。
await showKDialogContent(
context,
closeOnOutsideTab: false,
builder: (context) {
return Column(
children: [
const Text("你好啊!!!"),
Container(
color: Colors.green,
width: 100.0,
height: 100.0,
)
],
);
},
);
showConfirmationKDialog:
显示一个包含取消或接受选项的对话框,如果选择了接受选项,则返回 true
。
final response = await showConfirmationKDialog(context, title: "确认消息");
showAsyncProgressKDialog:
结合了各种对话框实现,允许请求确认、显示加载指示器、显示错误对话框并呈现重试选项。
// 简单用法
final resultvalue = await showAsyncProgressKDialog<String>(
context,
doProcess: () async {
await Future.delayed(const Duration(seconds: 2)); // 处理过程
return "value";
},
showSuccessSnackBar: true,
);
// 包含确认和重试功能
final resultvalue = await showAsyncProgressKDialog<String>(
context,
doProcess: () async {
await Future.delayed(const Duration(seconds: 2));
throw "这是一个错误,表示处理无法完成";
},
confirmationRequired: true,
showSuccessSnackBar: true,
loadingMessage: "处理中...",
retryable: true,
);
示例:
完整示例代码
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:kdialogs/kdialogs.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'KDialogs',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.green),
useMaterial3: true,
),
home: const HomePage(),
);
}
}
class HomePage extends StatelessWidget {
const HomePage({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: SingleChildScrollView(
child: SizedBox(
width: double.infinity,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
FilledButton(
onPressed: () async {
final close = await showKDialogWithLoadingMessage(context);
await Future.delayed(const Duration(seconds: 2));
close();
},
child: const Text("带消息的加载"),
),
FilledButton(
onPressed: () async {
final close = await showKDialogWithLoadingIndicator(context);
await Future.delayed(const Duration(seconds: 2));
close();
},
child: const Text("仅加载"),
),
FilledButton(
onPressed: () async {
await showBottomAlertKDialog(context, message: "这是一个错误消息", retryable: true);
},
child: const Text("底部错误消息"),
),
FilledButton(
onPressed: () async {
await showKDialogContent(
context,
closeOnOutsideTab: false,
builder: (context) {
return Column(
children: [
const Text("你好啊!!!"),
Container(
color: Colors.green,
width: 100.0,
height: 100.0,
)
],
);
},
);
},
child: const Text("显示简单内容"),
),
TextButton(
onPressed: () async {
final _ = await showConfirmationKDialog(context, message: "你确定吗?");
},
child: const Text("简单的确认对话框"),
),
FilledButton(
onPressed: () async {
final _ = await showConfirmationKDialog(context, title: "确认消息");
},
child: const Text("显示确认对话框"),
),
FilledButton(
onPressed: () async {
final _ = await showAsyncProgressKDialog<String>(
context,
doProcess: () async {
await Future.delayed(const Duration(seconds: 2));
return "value";
},
showSuccessSnackBar: true,
);
},
child: const Text("成功处理"),
),
FilledButton(
onPressed: () async {
final _ = await showAsyncProgressKDialog<String>(
context,
doProcess: () async {
await Future.delayed(const Duration(seconds: 2));
throw "这是一个错误,表示处理无法完成";
},
showSuccessSnackBar: true,
);
},
child: const Text("带错误的处理"),
),
FilledButton(
onPressed: () async {
final _ = await showAsyncProgressKDialog<String>(
context,
doProcess: () async {
await Future.delayed(const Duration(seconds: 2));
throw "这是一个错误,表示处理无法完成";
},
confirmationRequired: true,
showSuccessSnackBar: true,
loadingMessage: "处理中...",
retryable: true,
);
},
child: const Text("带错误和重试的处理"),
),
FilledButton(
onPressed: () async {
final _ = await showBasicOptionsKDialog(
context,
allowMultipleSelection: true,
searchInput: true,
selectedStrings: {"选项 1", "选项 5"},
options: getOptions(),
);
},
child: const Text("显示带初始字符串的选项"),
),
FilledButton(
onPressed: () async {
final result = await showBasicOptionsKDialog(
context,
allowMultipleSelection: true,
searchInput: true,
selectedItems: {Person(id: "2", name: "Jose")},
options: {
Person(id: "1", name: "Kevin"),
Person(id: "2", name: "Jose"),
Person(id: "3", name: "Martin"),
},
);
if (result == null) return;
for (var i in result) {
if (kDebugMode) print(i.name);
}
},
child: const Text("显示带初始选项的选项"),
),
FilledButton(
onPressed: () async {
final _ = await showBasicOptionsKDialog(
context,
allowMultipleSelection: true,
searchInput: true,
title: '列表选项',
options: getOptions(),
);
},
child: const Text("显示选项"),
),
FilledButton(
onPressed: () async {
final _ = await showAsyncOptionsDialog(
context,
allowMultipleSelection: true,
searchInput: true,
getOptions: () async {
final options = getOptions();
await Future.delayed(const Duration(seconds: 1));
return options;
},
);
},
child: const Text("显示异步选项"),
),
FilledButton(
onPressed: () async {
final _ = await showConfirmationKDialogWithCallback(
context,
onConfirm: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text("好的!!!")),
);
},
);
},
child: const Text("确认时执行"),
),
],
),
),
),
),
);
}
}
Set<String> getOptions() => {
"选项 1",
"选项 2",
"选项 3",
"选项 4",
"选项 5",
"选项 6",
"选项 7",
"选项 8",
"选项 9",
"选项 10",
"选项 11",
"选项 12",
"选项 13",
"选项 14",
"选项 15",
"选项 16",
"选项 17",
"选项 18",
"选项 19",
"选项 20",
"选项 21",
"选项 22",
};
class Person {
final String? id;
final String? name;
Person({
this.id,
this.name,
});
[@override](/user/override)
bool operator ==(Object other) {
return other is Person &&
other.runtimeType == runtimeType &&
other.id == id;
}
[@override](/user/override)
int get hashCode => id.hashCode;
[@override](/user/override)
String toString() => name ?? "";
}
更多关于Flutter对话框插件kdialogs的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter对话框插件kdialogs的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是一个关于如何在Flutter中使用kdialogs
插件的示例代码。请注意,kdialogs
插件实际上并不是Flutter的官方插件,而且在我最新的知识库中,没有直接找到名为kdialogs
的Flutter插件。不过,我会基于常见的对话框操作(比如showDialog
)来提供一个示例,你可以根据这个示例来理解和实现类似的对话框功能。
通常,Flutter中创建对话框会使用showDialog
函数和AlertDialog
组件。下面是一个简单的示例,展示了如何在Flutter中创建一个对话框:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Dialog Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
void _showDialog() {
showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: Text('提示'),
content: Text('这是一个Flutter对话框示例'),
actions: <Widget>[
FlatButton(
child: Text('取消'),
onPressed: () {
Navigator.of(context).pop();
},
),
FlatButton(
child: Text('确定'),
onPressed: () {
// 在这里添加点击确定后的逻辑
Navigator.of(context).pop();
// 例如,可以更新状态或执行其他操作
// setState(() {
// // 更新状态
// });
},
),
],
);
},
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Flutter Dialog Demo'),
),
body: Center(
child: ElevatedButton(
onPressed: _showDialog,
child: Text('显示对话框'),
),
),
);
}
}
在这个示例中,我们创建了一个简单的Flutter应用,其中包含一个按钮。当点击按钮时,会调用_showDialog
函数,该函数使用showDialog
来显示一个AlertDialog
。这个对话框包含一个标题、一些内容以及两个按钮:一个用于取消,另一个用于确定。
如果你确实在寻找一个名为kdialogs
的特定插件,并且它在某个特定的Flutter包管理器(如pub.dev)中可用,你可能需要查看该插件的官方文档或示例代码来获取更具体的用法。不过,大多数情况下,Flutter内置的对话框功能已经足够强大,可以满足大多数需求。