我正在尝试选择多个影像，因此为此我使用 pickMultiImage了 image_picker 的方法。影像显示在荧屏上，但我需要它们的路径，以便我可以使用它上传cloudinary.com.
这是我的代码
List<XFile>? _imageFileList3 = [];
Future pickMultipleImage() async {
if (_imageFileList3!.length == 4) {
showDialog(
context: context,
builder: (BuildContext context) {
return LoginSucessDailog(
text: 'You can\'t add more than 4 images.',
title: 'Warning.',
img: 'assets/img/alert.png');
});
} else {
try {
var image = await _picker.pickMultiImage();
//here i'll be using cloudinary code
setState(() {
_imageFileList3!.addAll(image!);
});
print(image);
print(_imageFileList3!.length);
setState(() {
isImageLoading = false;
});
} on CloudinaryException catch (e) {}
}
}
这是我用来使用 cloudinary_public 包在 Cloudinary 上上传影像的代码的一部分
CloudinaryResponse response = await cloudinary.uploadFile(
CloudinaryFile.fromFile(image!.path,
resourceType: CloudinaryResourceType.Image),
);
显示这样的影像
addProductsImages() {
if (_imageFileList3!.length != 0) {
return SizedBox(
height: 80,
width: MediaQuery.of(context).size.width * 0.9,
child: GridView.builder(
shrinkWrap: true,
itemCount: _imageFileList3!.length,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4,
),
itemBuilder: (BuildContext context, int index) {
return Padding(
padding: const EdgeInsets.all(8.0),
child: Stack(children: [
ClipRRect(
borderRadius: BorderRadius.circular(10.0),
child: Image.file(
File((_imageFileList3![index].path)),
width: MediaQuery.of(context).size.width * 0.35,
height: MediaQuery.of(context).size.height * 0.17,
fit: BoxFit.cover,
),
),
Align(
alignment: Alignment.topRight,
child: buildCancelIcon(Colors.white, () {
setState(() {
// _imageFileList!.removeAt(index);
});
}, Icons.cancel))
]));
}));
} else {
return Padding(
padding: const EdgeInsets.only(left: 70),
child:
Row(crossAxisAlignment: CrossAxisAlignment.center, children: []));
}
}
请帮助如何做到这一点，或者有什么方法可以一次选择多个影像并将它们上传到cloudinary。
uj5u.com热心网友回复：
请参考下面的示例代码，用户最多可以选择 5 张图片
使用这些包
影像选择器：^1.2.4
颤振影像压缩：^0.7.0
class PickMultipleImagesScreen extends StatefulWidget {
const PickMultipleImagesScreen({Key key}) : super(key: key);
@override
_PickMultipleImagesScreenState createState() =>
_PickMultipleImagesScreenState();
}
class _PickMultipleImagesScreenState extends State<PickMultipleImagesScreen> {
final ValueNotifier<bool> attachMultipleImages = ValueNotifier<bool>(false);
List compressedPhotosList = ["place_holder"];
int maxImagesCount = 5;
pickPhotos() async {
List<Media> photosList = [];
photosList = await ImagesPicker.pick(
count: (compressedPhotosList != null &&
(compressedPhotosList.isNotEmpty) &&
(compressedPhotosList.length > 1))
? (maxImagesCount 1 - compressedPhotosList.length)
: maxImagesCount,
pickType: PickType.all,
language: Language.System,
cropOpt: CropOption(
aspectRatio: CropAspectRatio(600, 400),
),
);
if (photosList != null && photosList.isNotEmpty && photosList.length > 0) {
for (int i = 0; i < photosList.length; i ) {
File photoCompressedFile =
await compressImage(File(photosList[i].path));
print("Images List: $photosList");
print("Path of UnCompressed File: ${photosList[i].path}");
compressedPhotosList.insert(
0,
photoCompressedFile.path.toString(),
);
print("Path of Compressed File: ${photoCompressedFile.path}");
print("Compressed Images List: $compressedPhotosList");
}
attachMultipleImages.value = !attachMultipleImages.value;
}
}
Future<File> compressImage(File file) async {
final filePath = file.absolute.path;
final lastIndex = filePath.lastIndexOf(new RegExp(r'.png|.jp'));
final splitted = filePath.substring(0, (lastIndex));
final outPath = "${splitted}_out${filePath.substring(lastIndex)}";
if (lastIndex == filePath.lastIndexOf(new RegExp(r'.png'))) {
final compressedImage = await FlutterImageCompress.compressAndGetFile(
filePath, outPath,
minWidth: 1000,
minHeight: 1000,
quality: 50,
format: CompressFormat.png);
return compressedImage;
} else {
final compressedImage = await FlutterImageCompress.compressAndGetFile(
filePath,
outPath,
minWidth: 1000,
minHeight: 1000,
quality: 50,
);
return compressedImage;
}
}
@override
Widget build(BuildContext context) {
return SafeArea(
child: ValueListenableBuilder<bool>(
valueListenable: attachMultipleImages,
builder: (context, snapshot, child) {
return Scaffold(
body: (compressedPhotosList != null &&
compressedPhotosList.isNotEmpty &&
compressedPhotosList.length > 1)
? GridView.builder(
itemCount: (compressedPhotosList != null &&
compressedPhotosList.isNotEmpty &&
compressedPhotosList.length > 1 &&
(compressedPhotosList.length - 1 == maxImagesCount))
? compressedPhotosList.length - 1
: compressedPhotosList.length,
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
crossAxisSpacing: 4.0,
mainAxisSpacing: 4.0),
itemBuilder: (BuildContext context, int index) {
return ((compressedPhotosList[index] == "place_holder") &&
compressedPhotosList.length - 1 != maxImagesCount)
? InkWell(
onTap: () async {
if (compressedPhotosList.length - 1 !=
maxImagesCount) {
pickPhotos();
}
},
child: Container(
margin: EdgeInsets.all(
5.0,
),
width: ScreenUtil().screenWidth,
height: ScreenUtil().setHeight(105.0),
color: Colors.blueAccent,
child: Center(
child: Icon(
Icons.add,
size: ScreenUtil().setSp(24.0),
color: Colors.grey,
),
),
),
)
: Stack(
clipBehavior: Clip.none,
children: [
ClipRRect(
borderRadius: BorderRadius.circular(4.0),
child: Image.file(
File(compressedPhotosList[index]),
fit: BoxFit.fitHeight,
width: ScreenUtil().screenWidth,
height: ScreenUtil().setHeight(105.0),
filterQuality: FilterQuality.low,
errorBuilder: (context, error, stackTrace) {
return Container(
width: ScreenUtil().screenWidth,
height: ScreenUtil().setHeight(105.0),
color: Colors.black,
);
},
),
),
Positioned(
bottom: 10,
right: 8,
child: InkWell(
onTap: () async {
compressedPhotosList.removeAt(index);
attachMultipleImages.value =
!attachMultipleImages.value;
},
child: CircleAvatar(
radius: 15.0,
backgroundColor: Colors.black45,
child: Icon(
Icons.delete_forever,
color: Colors.white,
size: 20,
),
),
),
)
],
);
},
)
: Center(
child: InkWell(
onTap: () {
pickPhotos();
},
child: Text("Attach Images"),
),
),
);
}
),
);
}
}
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