當我將 image_picker 升級到 image_picker: ^0.8.3 2 然后我得到一些錯誤如下：方法 'readAsBytesSync' 沒有為型別 'XFile' 定義。嘗試將名稱更正為現有方法的名稱，或定義名為“readAsBytesSync”的方法。
在代碼中
Img.Image image = Img.decodeImage(pickedImage.readAsBytesSync());
請幫助解決這個問題。
感謝您的幫助。
我的完整代碼是：
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_vector_icons/flutter_vector_icons.dart';
import 'package:image_picker/image_picker.dart';
import 'package:http/http.dart' as http;
import 'package:image/image.dart' as Img;
import 'dart:math' as Math;
import 'package:path_provider/path_provider.dart';
import 'package:path/path.dart';
import 'package:image_picker/image_picker.dart';
import 'package:path_provider/path_provider.dart';
import 'package:async/async.dart';
class ProfileScreen extends StatefulWidget {
@override
_ProfileScreenState createState() => _ProfileScreenState();
}
class _ProfileScreenState extends State<ProfileScreen> {
XFile pickedImage;
ImagePicker _imagePicker = ImagePicker();
File _imageUpload;
String fileName;
@override
Widget build(BuildContext context) {
double width = MediaQuery.of(context).size.width;
double height = MediaQuery.of(context).size.height;
return Stack(
fit: StackFit.expand,
children: [
Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [
Color.fromRGBO(4, 9, 35, 1),
Color.fromRGBO(39, 105, 171, 1),
],
begin: FractionalOffset.bottomCenter,
end: FractionalOffset.topCenter,
),
),
),
Scaffold(
backgroundColor: Colors.transparent,
body: SingleChildScrollView(
physics: BouncingScrollPhysics(),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 40),
child: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Icon(
AntDesign.arrowleft,
color: Colors.white,
),
Icon(
AntDesign.logout,
color: Colors.white,
),
],
),
SizedBox(
height: 10,
),
Text(
'My Profile',
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.white,
fontSize: 30,
fontFamily: 'Nisebuschgardens',
),
),
SizedBox(
height: 10,
),
Container(
height: height * 0.43,
child: LayoutBuilder(
builder: (context, constraints) {
double innerHeight = constraints.maxHeight;
double innerWidth = constraints.maxWidth;
return Stack(
fit: StackFit.expand,
children: [
Positioned(
bottom: 0,
left: 0,
right: 0,
child: Container(
height: innerHeight * 0.72,
width: innerWidth,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(30),
color: Colors.white,
),
child: Column(
children: [
SizedBox(
height: 85,
),
Text(
'I Nyoman Gunartha',
style: TextStyle(
color: Color.fromRGBO(39, 105, 171, 1),
fontFamily: 'Nunito',
fontSize: 25,
),
),
Text(
'NoPeg : 210026',
style: TextStyle(
color: Color.fromRGBO(39, 105, 171, 1),
fontFamily: 'Nunito',
fontSize: 20,
),
),
SizedBox(
height: 10,
),
],
),
),
),
Positioned(
top: 110,
right: 20,
child: Icon(
AntDesign.setting,
color: Colors.grey[700],
size: 30,
),
),
Positioned(
top: 0,
left: 0,
right: 0,
child: Center(
child: Container(
width: 150,
height: 150,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular (100.0),
),
child: pickedImage != null
? Container(
height: 200,
width: 200,
decoration: BoxDecoration(
borderRadius:
BorderRadius.circular(100.0),
image: DecorationImage(
image: FileImage(
File(pickedImage.path)),
fit: BoxFit.cover,
),
),
)
: Text('no image'),
),
),
),
],
);
},
),
),
SizedBox(
height: 20,
),
Container(
height: height * 0.3,
width: width,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(30),
color: Colors.white,
),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: Column(
children: [
SizedBox(
height: 20,
),
Text(
'Change Profile',
style: TextStyle(
color: Color.fromRGBO(39, 105, 171, 1),
fontSize: 20,
fontFamily: 'Nunito',
),
),
Divider(
thickness: 2.5,
),
SizedBox(
height: 10,
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton(
child: Text('Select Image'),
onPressed: () {
_selectImage();
}),
SizedBox(
width: 25,
),
ElevatedButton(
child: Text('Upload'),
onPressed: () {
upload(imageFile: pickedImage);
}),
],
),
],
),
),
)
],
),
),
),
)
],
);
}
void _selectImage() async {
try {
final checkDataImage =
// await _imagePicker.pickImage(source: ImageSource.gallery);
await _imagePicker.pickImage(source: ImageSource.camera);
if (checkDataImage != null) {
print(checkDataImage.name);
print(checkDataImage.path);
setState(() {
pickedImage = checkDataImage;
});
}
} catch (err) {
print(err);
pickedImage = null;
}
final tempDir = await getTemporaryDirectory();
final path = tempDir.path;
Img.Image image = Img.decodeImage(pickedImage.readAsBytesSync());
// Img.Image image = Img.decodeImage(pickedImage.readAsBytes());
Img.Image smallerImg = Img.copyResize(image, width: 500);
int rand = new Math.Random().nextInt(999999999);
var compressImg = new File('$path/image_$rand.jpg')
..writeAsBytesSync(Img.encodeJpg(smallerImg, quality: 90));
setState(() {
if (!mounted) return;
_imageUpload = compressImg;
});
}
upload({File imageFile}) async {
// var stream = new http.ByteStream(imageFile.openRead());
// stream.cast();
var stream = http.ByteStream(imageFile.openRead())..cast();
var length = await imageFile.length();
var multipartFile = http.MultipartFile('image', stream, length,
filename: basename(imageFile.path));
var uri = Uri.parse(urlAPI "upload-image.php");
var request = new http.MultipartRequest("POST", uri);
request.files.add(multipartFile);
try {
var response = await request.send();
if (response.statusCode == 200) {
var responseString = await response.stream.bytesToString();
print(responseString);
}
} catch (e) {
print('Network issue: ' e.toString());
}
}
}
uj5u.com熱心網友回復：
您應該使用回傳 Future的readAsBytes方法：
Img.Image image = Img.decodeImage(await pickedImage.readAsBytes());
轉載請註明出處，本文鏈接：https://www.uj5u.com/qianduan/337369.html