【发布时间】：2023-02-18 09:04:04
【问题描述】：
大家，我对 flutter 应用程序的发布版本有疑问，当应用程序在安装后第一次加载时，我确实得到了完美的一切，但在退出并重新打开应用程序后，Ui 构建出现了问题。 This is the expected result and as I get it for the first time.
This is what I get from the second time.
我注意到的关键点：
- 我认为它与 getX 和 get 控制器有关，因为在使用 get 之前我没有遇到任何错误，而我必须使用 getx 构建的最新应用程序抛出类似的错误。
- 当我在一段时间后重新打开应用程序时，它可以运行，然后在退出后再次运行，但它不会，这是一个连续的过程。
- 我正在使用 get 并分离视图、控制器和绑定。
这是我的 main.dart 文件、login_binding.dart 文件、login_controller.dart 文件和 login_view.dart 文件。
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:sizer/sizer.dart';
import 'package:travel_mate/app/utils/my_translations.dart';
import 'package:travel_mate/app/utils/themes.dart';
import 'app/modules/Bindings/login_binding.dart';
import 'app/routes/app_pages.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await GetStorage().initStorage;
runApp(
Sizer(
builder: (BuildContext context, Orientation orientation,
DeviceType deviceType) {
var isDark = GetStorage().read('isDark');
return GetMaterialApp(
defaultTransition: Transition.cupertino,
translations: MyTranslations(),
locale: Locale('en'),
fallbackLocale: Locale('np'),
themeMode: isDark != null
? isDark
? ThemeMode.dark
: ThemeMode.light
: ThemeMode.system,
debugShowCheckedModeBanner: false,
title: "Application",
getPages: AppPages.routes,
initialRoute: GetStorage().read('token') != null
? AppPages.INITIAL
: AppPages.SECONDARY,
theme: lightTheme,
darkTheme: darkTheme,
initialBinding: LoginBinding(),
);
},
),
);
}
import 'package:get/get.dart';
import 'package:travel_mate/app/modules/Controller/auth_controller.dart';
import 'package:travel_mate/app/modules/Controller/login_controller.dart';
class LoginBinding extends Bindings {
@override
void dependencies() {
Get.put(LoginController());
Get.put(AuthController());
}
}
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:travel_mate/app/models/user.dart';
import 'package:travel_mate/app/modules/Controller/auth_controller.dart';
import 'package:travel_mate/app/modules/views/tab/tab_view.dart';
class LoginController extends GetxController {
GlobalKey<FormState> formKey = GlobalKey();
TextEditingController emailOrUsernameController = TextEditingController();
TextEditingController passwordController = TextEditingController();
var isLoading = false.obs;
Rx<User?>? user;
@override
void dispose() {
super.dispose();
emailOrUsernameController.dispose();
passwordController.dispose();
}
final count = 0.obs;
void increment() => count.value++;
void login() async {
if (formKey.currentState!.validate()) {
isLoading.value = true;
Rx<User?> response = (await AuthController.instance
.login(emailOrUsernameController.text, passwordController.text))
.obs;
if (response.value != null) {
GetStorage().write('token', response.value!.token);
Get.offAndToNamed('/tab');
}
isLoading.value = false;
}
}
void clearFields() {
emailOrUsernameController.clear();
passwordController.clear();
}
String? validateEmailOrUsername(String? value) {
{
if (value!.isEmpty) {
return "Email or username can't be empty!";
} else if (!GetUtils.isEmail(value)) {
return "Not a valid email address!";
}
return null;
}
}
String? validatePassword(String? value) {
{
if (value!.isEmpty) {
return "Password can't be empty!";
} else if (value.length < 8) {
return "Password can't be less than 8 characters!";
}
return null;
}
}
}
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:get/get.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:sizer/sizer.dart';
import 'package:travel_mate/app/global_components/my_text_field.dart';
import 'package:travel_mate/app/modules/views/components/custom_button.dart';
import 'package:travel_mate/app/utils/colors.dart';
import '../Controller/login_controller.dart';
class LoginView extends GetView<LoginController> {
const LoginView({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: SingleChildScrollView(
keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
child: Column(
children: [
Container(
margin: EdgeInsets.symmetric(horizontal: 5.w, vertical: 5.w),
//FORMS START FROM HERE
child: Form(
key: controller.formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
//Main art and logo
Center(
child: SvgPicture.asset(
'assets/images/login_art.svg',
width: 75.w,
),
),
SizedBox(
height: 1.h,
),
Center(
child: Text(
'TravelMate',
style: TextStyle(
fontFamily: 'Comic Sans Ms',
fontSize: 22.5.sp,
color: primaryColor,
),
),
),
SizedBox(
height: 2.h,
),
Text(
'login'.tr,
style: TextStyle(
fontFamily:
GoogleFonts.poppins(fontWeight: FontWeight.bold)
.fontFamily,
fontSize: 15.sp,
color: primaryColor,
),
),
SizedBox(
height: 2.h,
),
//Username Field
MyTextField(
textEditingController:
controller.emailOrUsernameController,
validator: controller.validateEmailOrUsername,
textInputAction: TextInputAction.next,
labelText: 'emailLabel'.tr,
),
SizedBox(
height: 3.h,
),
//Password Field
MyTextField(
validator: controller.validatePassword,
textEditingController: controller.passwordController,
textInputAction: TextInputAction.done,
labelText: 'passwordLabel'.tr,
isPassword: true,
),
SizedBox(
height: 3.h,
),
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
InkWell(
onTap: () {},
child: Text(
'forgot'.tr,
style: TextStyle(
fontFamily: GoogleFonts.poppins().fontFamily),
),
)
],
),
SizedBox(
height: 4.h,
),
//Login button
Obx(
() => CustomButton(
onTap: controller.login,
isLoading: controller.isLoading.value,
title: 'login'.tr),
),
SizedBox(
height: 4.h,
),
//Sign in with google button
SizedBox(
height: 4.h,
),
//Not registered yet button
Center(
child: Text.rich(
TextSpan(
style: TextStyle(
fontFamily: GoogleFonts.poppins().fontFamily,
fontSize: 12.sp,
// color: const Color(0xff000000),
),
children: [
TextSpan(
text: 'registerText'.tr,
),
TextSpan(
recognizer: TapGestureRecognizer()
..onTap = (() {
Get.toNamed('/sign-up');
}),
text: 'signup'.tr,
style: TextStyle(
color: const Color(0xff0189e2),
),
),
],
),
textHeightBehavior: TextHeightBehavior(
applyHeightToFirstAscent: false),
textAlign: TextAlign.center,
softWrap: false,
),
),
],
),
),
),
],
),
),
),
);
}
}
【问题讨论】：
标签： android flutter get flutter-getx