Flutter一次性密码输入插件otp_form_field的使用
Flutter一次性密码输入插件otp_form_field的使用
该插件简化了具有自定义设计的一次性密码(OTP)字段的实现,并提供了高级验证功能。
安装
- 在你的
pubspec.yaml
文件中添加该包的最新版本(并运行dart pub get
):
dependencies:
otp_form_field: ^0.0.3
- 导入该包并在你的 Flutter 应用中使用它。
import 'package:otp_form_field/otp_form_field.dart';
示例
有许多属性可以帮助你修改 OTP 字段:
length
assignOtp
onChange
onComplete
isEditable
otpDecoration
-> OtpDecoration( . . 它包含其他属性,可以用来自定义 OtpDecoration 数据 )style
width
height
alignContentByPadding
enableAutoValidation
spaceBetweenFields
onTimeOut
resendOtpAllFeatures
-> ResendOtpAllFeatures( . . 它包含其他属性,可以用来自定义 ResendOtpAllFeatures 数据 )margin
errorMessageMargin
timerCountMargin
示例代码
class OtpScreen extends StatelessWidget {
const OtpScreen({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: OtpFormField(
width: 40,
height: 40,
spaceBetweenFields: 10,
resendOtpAllFeatures: ResendOtpAllFeatures(
timeOutDuration: 10,
),
otpDecoration: OtpDecoration(
fieldFocusErrorBorderColor: Colors.blue.shade300,
fieldFocusBorderColor: Colors.green.shade200,
fieldErrorBorderColor: Colors.transparent,
fieldsColor: [Colors.red.shade50, Colors.green.shade50, Colors.brown.shade50, Colors.blue.shade50],
),
length: 5,
onChange: (value) {
debugPrint("onChangeOTP>>$value");
},
onComplete: (onChangeOTP) {
debugPrint("on complete>>$onChangeOTP");
},
onTimeOut: (isTimeOut) {
debugPrint("on isTimeOut>>$isTimeOut");
},
),
),
);
}
}
另一个示例代码
class OtpScreen extends StatelessWidget {
const OtpScreen({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: OtpFormField(
width: 40,
height: 40,
spaceBetweenFields: 10,
resendOtpAllFeatures: ResendOtpAllFeatures(
timeOutDuration: 10,
),
otpDecoration: OtpDecoration(
fieldFocusErrorBorderColor: Colors.blue.shade300,
fieldFocusBorderColor: Colors.green.shade200,
fieldErrorBorderColor: Colors.transparent,
fieldsColor: [Colors.red.shade500, Colors.green.shade500, Colors.brown.shade500, Colors.blue.shade500],
isFieldColorSelected: true,
),
length: 5,
onChange: (value) {
debugPrint("onChangeOTP>>$value");
},
onComplete: (onChangeOTP) {
debugPrint("on complete>>$onChangeOTP");
},
onTimeOut: (isTimeOut) {
debugPrint("on isTimeOut>>$isTimeOut");
},
),
),
);
}
}
更多示例代码
class OtpScreen extends StatelessWidget {
const OtpScreen({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: OtpFormField(
width: 40,
height: 40,
spaceBetweenFields: 10,
resendOtpAllFeatures: ResendOtpAllFeatures(
timeOutDuration: 10,
),
otpDecoration: OtpDecoration(
errorValidationMsg: "Invalid Otp!",
fieldFocusErrorBorderColor: Colors.blue.shade300,
fieldFocusBorderColor: Colors.blue.shade200,
fieldErrorBorderColor: Colors.transparent,
fieldsColor: [
Colors.blue.shade50,
],
// isFieldColorSelected: true,
),
length: 5,
onChange: (value) {
debugPrint("onChangeOTP>>$value");
},
onComplete: (onChangeOTP) {
debugPrint("on complete>>$onChangeOTP");
},
onTimeOut: (isTimeOut) {
debugPrint("on isTimeOut>>$isTimeOut");
},
),
),
);
}
}
再一个示例代码
class OtpScreen extends StatelessWidget {
const OtpScreen({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: OTPFormField(
width: 40,
height: 40,
spaceBetweenFields: 10,
resendOtpAllFeatures: ResendOtpAllFeatures(
timeOutDuration: 60,
),
otpDecoration: OtpDecoration(
errorValidationMsg: "Invalid Otp!",
fieldFocusErrorBorderColor: Colors.blue.shade300,
fieldFocusBorderColor: Colors.blue.shade200,
fieldErrorBorderColor: Colors.transparent,
fieldsColor: [
Colors.blue.shade500,
],
isFieldColorSelected: true,
),
length: 5,
onChange: (value) {
debugPrint("onChangeOTP>>$value");
},
onComplete: (onChangeOTP) {
debugPrint("on complete>>$onChangeOTP");
},
onTimeOut: (isTimeOut) {
debugPrint("on isTimeOut>>$isTimeOut");
},
),
),
);
}
}
最后一个示例代码
class OtpScreen extends StatelessWidget {
const OtpScreen({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child:OTPFormField(
width: 40,
height: 40,
spaceBetweenFields: 10,
resendOtpAllFeatures: ResendOtpAllFeatures(
timeOutDuration: 60,
),
otpDecoration: OtpDecoration(
errorValidationMsg: "Invalid Otp!",
fieldFocusErrorBorderColor: Colors.blue.shade300,
fieldFocusBorderColor: Colors.blue.shade200,
fieldErrorBorderColor: Colors.transparent,
isFieldColorSelected: true,
),
length: 5,
onChange: (value) {
debugPrint("onChangeOTP>>$value");
},
onComplete: (onChangeOTP) {
debugPrint("on complete>>$onChangeOTP");
},
onTimeOut: (isTimeOut) {
debugPrint("on isTimeOut>>$isTimeOut");
},
),
),
);
}
}
更多关于Flutter一次性密码输入插件otp_form_field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一次性密码输入插件otp_form_field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,以下是如何在Flutter应用中使用otp_form_field
插件来实现一次性密码(OTP)输入的一个示例代码案例。otp_form_field
是一个方便的插件,用于创建OTP输入字段,通常用于验证码输入界面。
首先,确保你的pubspec.yaml
文件中已经添加了otp_form_field
依赖:
dependencies:
flutter:
sdk: flutter
otp_form_field: ^x.y.z # 请替换为最新版本号
然后运行flutter pub get
来安装依赖。
接下来,在你的Dart文件中使用OTPFormField
来创建OTP输入字段。以下是一个完整的示例:
import 'package:flutter/material.dart';
import 'package:otp_form_field/otp_form_field.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'OTP Input Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: OTPScreen(),
);
}
}
class OTPScreen extends StatefulWidget {
@override
_OTPScreenState createState() => _OTPScreenState();
}
class _OTPScreenState extends State<OTPScreen> {
final _controller = TextEditingController();
final _focusNode = FocusNode();
String? _otpResult;
@override
void dispose() {
_controller.dispose();
_focusNode.dispose();
super.dispose();
}
void _onCompleted(String otp) {
setState(() {
_otpResult = otp;
});
// 在这里处理OTP完成后的逻辑,比如发送到服务器验证
print('OTP Entered: $_otpResult');
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('OTP Input Example'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
OTPFormField(
controller: _controller,
focusNode: _focusNode,
length: 6, // OTP长度
width: 50.0,
height: 50.0,
decoration: InputDecoration(
border: OutlineInputBorder(),
),
onCompleted: _onCompleted,
style: TextStyle(fontSize: 24),
fieldStyle: TextStyle(fontSize: 24, color: Colors.black),
autoFocus: true,
),
SizedBox(height: 20),
if (_otpResult != null)
Text(
'OTP Entered: $_otpResult',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
),
],
),
),
);
}
}
代码说明:
- 依赖导入:首先导入
flutter/material.dart
和otp_form_field/otp_form_field.dart
。 - 主应用:创建一个
MyApp
类,它包含一个OTPScreen
作为首页。 - OTP屏幕:
OTPScreen
是一个有状态的组件,包含一个文本编辑控制器和一个焦点节点。 - OTP输入字段:使用
OTPFormField
来创建OTP输入字段。配置字段的长度、宽度、高度、装饰、样式等。 - 完成回调:当用户完成OTP输入时,触发
_onCompleted
回调,并在这里处理OTP。 - 显示结果:如果OTP已经输入,显示输入的OTP。
运行这个代码,你会看到一个简单的OTP输入界面。用户可以逐个输入数字,当所有数字输入完毕后,_onCompleted
回调会被触发,你可以在回调中处理OTP的验证逻辑。