小编Era*_*çük的帖子

我的signup.dart 文件：

    import 'package:firebase_auth/firebase_auth.dart';\nimport 'package:flutter/material.dart';\n\nclass SignUp extends StatefulWidget {\n  @override\n  _SignUpState createState() => _SignUpState();\n}\n\nclass _SignUpState extends State<SignUp> {\n  final FirebaseAuth firebaseAuth = FirebaseAuth.instance;\n  final _formKey = GlobalKey<FormState>();\n  TextEditingController _emailTextController = TextEditingController();\n  TextEditingController _passwordTextController = TextEditingController();\n  TextEditingController _nameTextController = TextEditingController();\n  TextEditingController _confirmPasswordTextController =\n      TextEditingController();\n  String gender;\n  String groupValue = "Erkek";\n\n  bool loading = false;\n\n  @override\n  Widget build(BuildContext context) {\n    return Scaffold(\n      body: Stack(\n        children: <Widget>[\n          Image.asset(\n            'images/backg.jpg',\n            fit: BoxFit.fill,\n            width: double.infinity,\n            height: double.infinity,\n          ),\n          Container(\n            color: Colors.black.withOpacity(0.4),\n            width: double.infinity,\n            height: …