【发布时间】：2021-01-08 10:37:55
【问题描述】：
我在一个容器中设置了这个注册表单，我希望这个容器贴在屏幕底部。我尝试用 Positioned 小部件包装它并将其底部设置为零，但它不起作用。
Container(
margin: EdgeInsets.only(top: kSpacingUnit * 1.0),
width: double.infinity,
decoration: BoxDecoration(
color: Colors.white,
boxShadow: kBoxShadow,
),
padding: EdgeInsets.fromLTRB(
0.1 * SizingInfo.screenWidth,
0.1 * SizingInfo.screenWidth,
0.1 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
),
child: Form(
key: _formKey,
child: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
SizedBox(height: 0.1 * SizingInfo.screenWidth),
Padding(
padding: EdgeInsets.fromLTRB(
0.01 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
0.01 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
),
child: TextFormField(
keyboardType: TextInputType.emailAddress,
validator: (value) {
if (value.isEmpty) {
return 'Email Address cannot be left empty';
}
if (!value.contains('@') || !value.contains('.')) {
return 'Enter a valid Email Address';
}
return null;
},
onChanged: (value) {
setState(() => _email = value.trim());
},
decoration: InputDecoration(
prefixIcon: Icon(Icons.mail_outline),
labelText: 'Email Address',
labelStyle: TextStyle(
fontSize: 16.0,
color: Colors.black54,
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.black54),
),
),
style: TextStyle(
fontSize: 16.0,
color: Colors.black54,
),
onTap: null,
),
),
SizedBox(height: 0.01 * SizingInfo.screenWidth),
Padding(
padding: EdgeInsets.fromLTRB(
0.01 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
0.01 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
),
child: TextFormField(
obscureText: true,
validator: (value) {
if (value.isEmpty) {
return 'Password cannot be left empty';
}
if (value.length < 6) {
return 'Password needs to be at least 6 characters long';
}
return null;
},
onChanged: (value) {
setState(() => _password = value);
},
decoration: InputDecoration(
prefixIcon: Icon(Icons.lock_outline),
labelText: 'Password',
labelStyle: TextStyle(
fontSize: 16.0,
color: Colors.black54,
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.black54),
),
suffixIcon: Icon(
Icons.remove_red_eye,
color: Colors.grey.shade400,
),
),
style: TextStyle(
fontSize: 16.0,
color: Colors.black54,
),
),
),
SizedBox(height: 0.01 * SizingInfo.screenWidth),
Padding(
padding: EdgeInsets.fromLTRB(
0.01 * SizingInfo.screenWidth,
0.01 * SizingInfo.screenWidth,
0.01 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Text(
'Forgot Password ?',
style: TextStyle(
color: Colors.black54,
fontSize: 12.0,
fontWeight: FontWeight.w400),
),
],
),
),
SizedBox(height: 0.05 * SizingInfo.screenWidth),
GestureDetector(
onTap: () {
if (_formKey.currentState.validate()) {
final _signInResponse =
_auth.signInWithEmail(this._email, this._password);
if (_signInResponse != null) {
Navigator.pushReplacementNamed(context, '/');
}
}
},
child: LoginButton(
buttonTitle: 'Sign In',
textColor: Colors.white,
iconPath: Icons.lock_outline,
iconColor: Colors.white,
),
),
SizedBox(height: 0.02 * SizingInfo.screenWidth),
Padding(
padding: EdgeInsets.fromLTRB(
0.01 * SizingInfo.screenWidth,
0.00 * SizingInfo.screenWidth,
0.01 * SizingInfo.screenWidth,
0.05 * SizingInfo.screenWidth,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Text(
'Need an account?',
style: TextStyle(
color: Colors.black54,
fontSize: 14,
fontWeight: FontWeight.w400,
),
),
SizedBox(width: 0.01 * SizingInfo.screenWidth),
GestureDetector(
onTap: () => Navigator.pushReplacementNamed(
context, '/signup'),
child: Text(
'Sign Up',
style: TextStyle(
color: Color(0xFF528DF9),
fontSize: 14.0,
fontWeight: FontWeight.w500),
),
),
],
),
),
SizedBox(height: 0.05 * SizingInfo.screenWidth),
Padding(
padding: EdgeInsets.symmetric(
horizontal: 0.01 * SizingInfo.screenWidth),
child: Row(
children: <Widget>[
Expanded(
child: Container(
child: Divider(
height: 0.0,
thickness: 0.5,
color: Colors.black54,
),
),
),
Text(
' Sign In With ',
style: TextStyle(
color: Colors.black54,
fontSize: 16.0,
),
),
Expanded(
child: Container(
child: Divider(
height: 0.0,
thickness: 0.5,
color: Colors.grey.shade500,
),
),
),
],
),
),
SizedBox(height: 0.075 * SizingInfo.screenWidth),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
CircleButton(
onTap: () => print("Google"),
imagePath: 'assets/images/google.png',
),
SizedBox(width: 0.1 * SizingInfo.screenWidth),
CircleButton(
onTap: () => print("Facebook"),
imagePath: 'assets/images/facebook.png',
),
],
),
SizedBox(height: kSpacingUnit * 5.0),
],
),
),
),
),
这就是屏幕的样子：
谁能帮忙解决这个问题。提前非常感谢您！
更新：
应用@Besufkd 建议的解决方案后，容器卡在底部，但谷歌和 Facebook 按钮下方出现了一些不需要的空白，如下面的屏幕所示，请您帮我解决这个问题：
【问题讨论】：
-
所以你不需要底部的蓝色容器，相反，它应该在下面显示 Fb 和 google 图标。
-
蓝色是脚手架的背景。
标签： flutter dart flutter-layout