Flutter仿Boss-3.登录页

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效果

介绍

在Flutter应用程序中创建登录页面对于用户认证和参与至关重要。登录页面作为用户访问应用程序功能的入口。它应该提供无缝的体验，同时确保安全和隐私。这里仿Boss应用设计的登录页面，我们将创建一个登录页面，允许用户使用手机号码登录或注册。

小插曲

首先，让我们设置Flutter项目并创建一个登录页面组件。我们将使用GetX进行状态管理和UI更新。确保您在开发环境中安装了Flutter和GetX。

实现

1. 依赖项

确保您在pubspec.yaml文件中具有必要的依赖项：

dependencies:flutter:sdk: flutterget: ^4.6.2

2. 登录页小部件

创建一个名为login_page.dart的新文件，并定义LoginPage小部件。此小部件将包含登录页面的UI元素：

// login_page.dart
class LoginPage extends StatelessWidget {const LoginPage({Key? key}) : super(key: key);@overrideWidget build(BuildContext context) {final logic = Get.find<LoginLogic>();return Scaffold(body: Container(padding: EdgeInsets.fromLTRB(24.w, 60.w, 24.w, 24.w),child: Column(crossAxisAlignment: CrossAxisAlignment.start,children: [Text("手机号登录/注册",style: TextStyle(fontWeight: FontWeight.w500,fontSize: 30.sp,color: RC.text1Color,),),SizedBox(height: 6.w),Text("首次验证通过即注册BOSS直聘账号",style: TextStyle(fontWeight: FontWeight.w500,fontSize: 14.sp,color: RC.text2Color,),),SizedBox(height: 10.w),Row(children: [Text("+86",style: TextStyle(fontSize: 16.sp,color: Colors.black,),),Icon(Icons.keyboard_arrow_down,size: 25.w,color: Colors.black.withAlpha(70),),Expanded(child: TextField(controller: logic.controller,keyboardType: TextInputType.phone,inputFormatters: [FilteringTextInputFormatter.allow(RegExp(r'[0-9]')),],style: TextStyle(color: Colors.black, fontSize: 18.sp),onChanged: (value) {logic.state.phoneNum.value = value;},decoration: InputDecoration(hintText: '请输入您的手机号码',// 设置 hintTexthintStyle: TextStyle(color: Colors.grey, fontSize: 18.sp),// 设置 hintText 的颜色border: InputBorder.none,// 取消底部下划线enabledBorder: const OutlineInputBorder(borderSide: BorderSide(color: Colors.transparent), // 取消输入框选中时的边框颜色),focusedBorder: const OutlineInputBorder(borderSide: BorderSide(color: Colors.transparent), // 取消输入框获取焦点时的边框颜色),),),),],),Divider(height: 1.w,color: Colors.grey,),SizedBox(height: 16.w),Obx(() => InkWell(onTap: () {logic.state.isAgree.value = !logic.state.isAgree.value;},child: Row(crossAxisAlignment: CrossAxisAlignment.start,children: [Padding(padding: const EdgeInsets.only(top: 5),child: Icon(logic.state.isAgree.value? Icons.check_circle: Icons.circle_outlined,size: 18.r,color: logic.state.isAgree.value? RC.themeColor: Colors.grey,),),SizedBox(width: 5.w),Expanded(child:RichText(text: TextSpan(text: '已阅读并同意',style: const TextStyle(color: Colors.black, fontSize: 16),children: [TextSpan(text: '《BOSS直聘用户协议》',style: const TextStyle(color: RC.themeColor),recognizer: TapGestureRecognizer()..onTap = () {ToastUtil.show(msg: "跳转到BOSS直聘用户协议");},),const TextSpan(text: ' 和 ',style:TextStyle(color: Colors.black, fontSize: 16),),TextSpan(text: '《隐私政策》',style: const TextStyle(color: RC.themeColor),recognizer: TapGestureRecognizer()..onTap = () {ToastUtil.show(msg: "跳转到隐私政策");},),const TextSpan(text: '，允许BOSS直聘统一管理本人账号信息',style:TextStyle(color: Colors.black, fontSize: 16),),],),),),],),),),Obx(() => InkWell(onTap: () {logic.next(context);},child: Container(height: 50.w,alignment: Alignment.center,margin: EdgeInsets.only(top: 20.w, bottom: 30.w),decoration: BoxDecoration(borderRadius: BorderRadius.all(Radius.circular(8.r)),color: logic.state.phoneNum.isNotEmpty? RC.themeColor: RC.themeColor.withAlpha(50)),child: Text("下一步",style: TextStyle(fontSize: 20.sp,fontWeight: FontWeight.w600,color: Colors.white,),),),),),Text("接受不到短信",style: TextStyle(fontSize: 14.sp,color: Colors.grey,),),Expanded(child: Align(alignment: Alignment.bottomCenter,child: Column(crossAxisAlignment: CrossAxisAlignment.center,mainAxisAlignment: MainAxisAlignment.end,children: [Text("或通过以下方式登录",style: TextStyle(fontSize: 14.sp,color: Colors.grey,),),SizedBox(height: 20.w),InkWell(onTap: () {logic.wxLogin();},child: Image.asset(R.login_wx_png,width: 50.w,height: 50.w,),),SizedBox(height: 35.w),Text("服务热线 举报监督电话 资质证照",style: TextStyle(fontSize: 14.sp,color: Colors.grey,),),],),),),],),),);}
}

3. 登录页逻辑

为登录页面创建一个逻辑类，用于处理业务逻辑和状态管理。定义处理用户输入和交互的方法：

// logic.dartimport 'package:flutter/material.dart';
import 'package:get/get.dart';import 'util/toast_util.dart';class LoginLogic extends GetxController {final LoginState state = LoginState();final TextEditingController controller = TextEditingController();void wxLogin() {ToastUtil.show(msg: '微信登录');}void next(BuildContext context) {if (!state.isAgree.value) {showDialog(context: context,builder: (BuildContext context) {return AlertDialog(content: RichText(text: TextSpan(text: '请阅读并同意',style: const TextStyle(color: Colors.black, fontSize: 16),children: [TextSpan(text: '《BOSS直聘用户协议》',style: const TextStyle(color: RC.themeColor),recognizer: TapGestureRecognizer()..onTap = () {ToastUtil.show(msg: "跳转到BOSS直聘用户协议");},),const TextSpan(text: ' 和 ',style: TextStyle(color: Colors.black, fontSize: 16),),TextSpan(text: '《隐私政策》',style: const TextStyle(color: RC.themeColor),recognizer: TapGestureRecognizer()..onTap = () {ToastUtil.show(msg: "跳转到隐私政策");},),const TextSpan(text: '，允许BOSS直聘统一管理本人账号信息',style: TextStyle(color: Colors.black, fontSize: 16),),],),),actions: <Widget>[TextButton(onPressed: () {Navigator.of(context).pop();},child: const Text('拒绝',style: TextStyle(fontSize: 16,color: RC.themeColor,),),),TextButton(onPressed: () {state.isAgree.value = true;Navigator.of(context).pop();},child: const Text('同意',style: TextStyle(fontSize: 16,color: RC.themeColor,),),),],);},);return;}ToastUtil.show(msg: '下一步');}
}class LoginState {RxString phoneNum = "".obs;RxBool isAgree = false.obs;
}

4. 主程序入口

在您的主文件中，将登录页面添加到应用程序的路由中：

// main.dartimport 'package:flutter/material.dart';
import 'package:get/get.dart';import 'login_page.dart';
import 'logic.dart';void main() {runApp(MyApp());
}class MyApp extends StatelessWidget {@overrideWidget build(BuildContext context) {return GetMaterialApp(home: LoginPage(),initialBinding: BindingsBuilder(() {Get.lazyPut<LoginLogic>(() => LoginLogic());}),);}
}