【发布时间】：2021-07-18 13:03:18
【问题描述】：
我正在尝试为产品添加新系列，但出现该错误 无效的 radix-10 数字（在字符 1 处）//flutter-update-4bb0a-default-rtdb.firebaseio.com/ ^
我已确保输入的所有值都是字符串，搜索错误并没有真正帮助我
class EditProductScreen extends StatefulWidget {
static const routeName = '/edit-product';
@override
_EditProductScreenState createState() => _EditProductScreenState();
}
class _EditProductScreenState extends State<EditProductScreen> {
final _priceFocusNode = FocusNode();
final _descriptionFocusNode = FocusNode();
final _imageUrlController = TextEditingController();
final _imageUrlFocusNode = FocusNode();
final _form = GlobalKey<FormState>();
var _editedProduct = Product(
id: null,
title: '',
price: 0,
description: '',
imageUrl: '',
);
var _initValues = {
'title': '',
'description': '',
'price': '',
'imageUrl': '',
};
var _isInit = true;
@override
void initState() {
_imageUrlFocusNode.addListener(_updateImageUrl);
super.initState();
}
@override
void didChangeDependencies() {
if (_isInit) {
final productId = ModalRoute.of(context).settings.arguments as String;
if (productId != null) {
_editedProduct =
Provider.of<Products>(context, listen: false).findById(productId);
_initValues = {
'title': _editedProduct.title,
'description': _editedProduct.description,
'price': _editedProduct.price.toString(),
// 'imageUrl': _editedProduct.imageUrl,
'imageUrl': '',
};
_imageUrlController.text = _editedProduct.imageUrl;
}
}
_isInit = false;
super.didChangeDependencies();
}
@override
void dispose() {
_imageUrlFocusNode.removeListener(_updateImageUrl);
_priceFocusNode.dispose();
_descriptionFocusNode.dispose();
_imageUrlController.dispose();
_imageUrlFocusNode.dispose();
super.dispose();
}
void _updateImageUrl() {
if (!_imageUrlFocusNode.hasFocus) {
if ((!_imageUrlController.text.startsWith('http') &&
!_imageUrlController.text.startsWith('https')) ||
(!_imageUrlController.text.endsWith('.png') &&
!_imageUrlController.text.endsWith('.jpg') &&
!_imageUrlController.text.endsWith('.jpeg'))) {
return;
}
setState(() {});
}
}
void _saveForm() {
final isValid = _form.currentState.validate();
if (!isValid) {
return;
}
_form.currentState.save();
if (_editedProduct.id != null) {
Provider.of<Products>(context, listen: false)
.updateProduct(_editedProduct.id, _editedProduct);
} else {
Provider.of<Products>(context, listen: false).addProduct(_editedProduct);
}
Navigator.of(context).pop();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Edit Product'),
actions: <Widget>[
IconButton(
icon: Icon(Icons.save),
onPressed: _saveForm,
),
],
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Form(
key: _form,
child: ListView(
children: <Widget>[
TextFormField(
initialValue: _initValues['title'],
decoration: InputDecoration(labelText: 'Title'),
textInputAction: TextInputAction.next,
onFieldSubmitted: (_) {
FocusScope.of(context).requestFocus(_priceFocusNode);
},
validator: (value) {
if (value.isEmpty) {
return 'Please provide a value.';
}
return null;
},
onSaved: (value) {
_editedProduct = Product(
title: value,
price: _editedProduct.price,
description: _editedProduct.description,
imageUrl: _editedProduct.imageUrl,
id: _editedProduct.id,
isFavorite: _editedProduct.isFavorite);
},
),
TextFormField(
initialValue: _initValues['price'],
decoration: InputDecoration(labelText: 'Price'),
textInputAction: TextInputAction.next,
keyboardType: TextInputType.number,
focusNode: _priceFocusNode,
onFieldSubmitted: (_) {
FocusScope.of(context).requestFocus(_descriptionFocusNode);
},
validator: (value) {
if (value.isEmpty) {
return 'Please enter a price.';
}
if (double.tryParse(value) == null) {
return 'Please enter a valid number.';
}
if (double.parse(value) <= 0) {
return 'Please enter a number greater than zero.';
}
return null;
},
onSaved: (value) {
_editedProduct = Product(
title: _editedProduct.title,
price: double.parse(value),
description: _editedProduct.description,
imageUrl: _editedProduct.imageUrl,
id: _editedProduct.id,
isFavorite: _editedProduct.isFavorite);
},
),
TextFormField(
initialValue: _initValues['description'],
decoration: InputDecoration(labelText: 'Description'),
maxLines: 3,
keyboardType: TextInputType.multiline,
focusNode: _descriptionFocusNode,
validator: (value) {
if (value.isEmpty) {
return 'Please enter a description.';
}
if (value.length < 10) {
return 'Should be at least 10 characters long.';
}
return null;
},
onSaved: (value) {
_editedProduct = Product(
title: _editedProduct.title,
price: _editedProduct.price,
description: value,
imageUrl: _editedProduct.imageUrl,
id: _editedProduct.id,
isFavorite: _editedProduct.isFavorite,
);
},
),
Row(
crossAxisAlignment: CrossAxisAlignment.end,
children: <Widget>[
Container(
width: 100,
height: 100,
margin: EdgeInsets.only(
top: 8,
right: 10,
),
decoration: BoxDecoration(
border: Border.all(
width: 1,
color: Colors.grey,
),
),
child: _imageUrlController.text.isEmpty
? Text('Enter a URL')
: FittedBox(
child: Image.network(
_imageUrlController.text,
fit: BoxFit.cover,
),
),
),
Expanded(
child: TextFormField(
decoration: InputDecoration(labelText: 'Image URL'),
keyboardType: TextInputType.url,
textInputAction: TextInputAction.done,
controller: _imageUrlController,
focusNode: _imageUrlFocusNode,
onFieldSubmitted: (_) {
_saveForm();
},
validator: (value) {
if (value.isEmpty) {
return 'Please enter an image URL.';
}
if (!value.startsWith('http') &&
!value.startsWith('https')) {
return 'Please enter a valid URL.';
}
if (!value.endsWith('.png') &&
!value.endsWith('.jpg') &&
!value.endsWith('.jpeg')) {
return 'Please enter a valid image URL.';
}
return null;
},
onSaved: (value) {
_editedProduct = Product(
title: _editedProduct.title,
price: _editedProduct.price,
description: _editedProduct.description,
imageUrl: value,
id: _editedProduct.id,
isFavorite: _editedProduct.isFavorite,
);
},
),
),
],
),
],
),
),
),
);
}
}
我的添加方法是：
void addProduct(Product product) {
var url = Uri.https(
'https://flutter-update-4bb0a-default-rtdb.firebaseio.com',
'/products.json');
http.post(
url,
body: json.encode({
'title': product.title,
'description': product.description,
'imageUrl': product.imageUrl,
'price': product.price,
'isFavorite': product.isFavorite,
}),
);
final newProduct = Product(
title: product.title,
description: product.description,
price: product.price,
imageUrl: product.imageUrl,
id: DateTime.now().toString());
_items.add(newProduct);
notifyListeners();
}
知道为什么会这样吗？
【问题讨论】：
标签： flutter dart firebase-realtime-database