Flutter 병합 이미지 목록
Oct 29 2020
나는 몇 개의 이미지를 병합하여 하나로 표시하는 작업을하고있었습니다. 두 개의 다트 파일이 하나는 이미지 추가 용이고 다른 하나는 병합 된 결과를 표시하기위한 것입니다.
첫 번째 파일 코드는
class SingleImageUpload extends StatefulWidget {
@override
_SingleImageUploadState createState() {
return _SingleImageUploadState();
}
}
class _SingleImageUploadState extends State<SingleImageUpload> {
List<Object> images = List<Object>();
File _selectedFile;
bool _inProcess = false;
Map data = {};
Readerservice _readerservice;
@override
void initState() {
// TODO: implement initState
super.initState();
setState(() {
images.add("Add Image");
images.add("Add Image");
images.add("Add Image");
images.add("Add Image");
});
}
@override
Widget build(BuildContext context) {
return new MaterialApp(
debugShowCheckedModeBanner: false,
home: new Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
leading: Padding(
padding: EdgeInsets.only(left: 12),
child: IconButton(
icon: Icon(Icons.arrow_back_ios,
color: Colors.black,
size: 30,),
onPressed: () {
Navigator.pushNamed(context, '/');
},
),
),
title: Row(
mainAxisAlignment: MainAxisAlignment.center,
children:<Widget>[
Text('Basic AppBar'),
]
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.more_vert,
color: Colors.black,
size: 30,),
onPressed: () {
print('Click start');
},
),
],
),
body:
Column(
children: <Widget>[
SizedBox(height: 10),
Row(children: <Widget>[
Text('Image',
style: TextStyle(
color: Colors.black,
fontSize: 33,
fontWeight: FontWeight.bold,
)),
Text('Merger',
style: TextStyle(
color: Colors.orange,
fontSize: 33,
fontWeight: FontWeight.bold,
)),
]),
SizedBox(height: 40),
Text(' merge it here'),
SizedBox(height: 10),
Expanded(
child: buildGridView(),
),
RaisedButton(
textColor: Colors.white,
color: Colors.orange,
child: Text("Finish",
style: TextStyle(fontSize: 15),),
onPressed: () {
pasimage();
},
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(8.0),
),
),
],
),
),
);
}
Widget buildGridView() {
return GridView.count(
shrinkWrap: true,
crossAxisCount: 3,
childAspectRatio: 1,
children: List.generate(images.length, (index) {
if (images[index] is ImageUploadModel) {
ImageUploadModel uploadModel = images[index];
return Card(
clipBehavior: Clip.antiAlias,
child: Stack(
children: <Widget>[
Image.file(
uploadModel.imageFile,
width: 300,
height: 300,
),
Positioned(
right: 5,
top: 5,
child: InkWell(
child: Icon(
Icons.remove_circle,
size: 20,
color: Colors.red,
),
onTap: () {
setState(() {
images.replaceRange(index, index + 1, ['Add Image']);
});
},
),
),
],
),
);
} else {
return Card(
child: IconButton(
icon: Icon(Icons.add),
onPressed: () {
//popup
showDialog(
context: context,
builder: (context) {
return Dialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10)),
elevation: 16,
child: Container(
height: 180.0,
width: 330.0,
child: ListView(
children: <Widget>[
SizedBox(height: 20),
//Center(
Padding(
padding: const EdgeInsets.only(left: 15.0),
child: Text(
"Add a Receipt",
textAlign: TextAlign.left,
style: TextStyle(
fontSize: 24,
color: Colors.black,
fontWeight: FontWeight.bold),
),
),
// ),
SizedBox(height: 20),
FlatButton(
child: Text(
'Take a photo..',
textAlign: TextAlign.left,
style: TextStyle(fontSize: 20),
),
onPressed: () {
_onAddImageClick(index,ImageSource.camera);
Navigator.of(context).pop();
// picker.getImage(ImageSource.camera);
},
textColor: Colors.black,
),
FlatButton(
child: Text(
'Choose from Library..',
style: TextStyle(fontSize: 20),
textAlign: TextAlign.left,
),
onPressed: () {
_onAddImageClick(index,ImageSource.gallery);
Navigator.of(context).pop();
},
textColor: Colors.black,
),
],
),
),
);
},
);
//pop ends
},
),
);
}
}),
);
}
Future _onAddImageClick(int index, ImageSource source ) async {
setState(() {
_inProcess = true;
});
File image = await ImagePicker.pickImage(source: source);
if(image != null){
File cropped = await ImageCropper.cropImage(
sourcePath: image.path,
maxWidth: 1080,
maxHeight: 1080,
compressFormat: ImageCompressFormat.jpg,
androidUiSettings: AndroidUiSettings(
toolbarColor: Colors.black,
toolbarWidgetColor: Colors.white,
//toolbarTitle: "RPS Cropper",
statusBarColor: Colors.deepOrange.shade900,
backgroundColor: Colors.black,
initAspectRatio: CropAspectRatioPreset.original,
lockAspectRatio: false
),
iosUiSettings: IOSUiSettings(
minimumAspectRatio: 1.0,
)
);
this.setState((){
_selectedFile = cropped ;
_inProcess = false;
});
} else {
this.setState((){
_inProcess = false;
});
}
getFileImage(index);
}
void getFileImage(int index) async {
// var dir = await path_provider.getTemporaryDirectory();
setState(() {
ImageUploadModel imageUpload = new ImageUploadModel();
imageUpload.isUploaded = false;
imageUpload.uploading = false;
imageUpload.imageFile = _selectedFile;
imageUpload.imageUrl = '';
images.replaceRange(index, index + 1, [imageUpload]);
});
}
void pasimage(){
Navigator.pushReplacementNamed(context, '/crop',arguments: {
'imageList':ImagesMerge(
images,///required,images list
direction: Axis.vertical,///direction
backgroundColor: Colors.black26,///background color
fit: false,///scale image to fit others
),
});
}
}
class ImageUploadModel {
bool isUploaded;
bool uploading;
File imageFile;
String imageUrl;
ImageUploadModel({
this.isUploaded,
this.uploading,
this.imageFile,
this.imageUrl,
});
}
이미지를 추가 한 후 완료 버튼을 누르면 오류 가 표시됩니다. 제스처를 처리하는 동안 다음 _TypeError가 발생했습니다. '목록'유형은 '목록'유형의 하위 유형이 아닙니다.
바로 위에있는 페이지는 위 코드에서 전송 된 데이터를 캡처하고 이미지를 표시합니다.
누군가가 왜 오류인지 알고 있으면 제발 도와주세요.
답변
ahmed Oct 30 2020 at 08:09
변화 images에를 List<Object> images = [].