原以为很难的东西，东找找西找找，只有一个鲁班压缩，但都不怎么维护状态最终找到好的办法，可以通过multi_image_picker库的二进制压缩
ByteData byteData = await Assets.getByteData(quality: 80);80就是压缩比例，默认为100Assets为获取到的图片类型上传的时候可以通过
_imgListUpload = [];ByteData byteData = await multiImages[i].getByteData(quality: 30);List imageData = byteData.buffer.asUint8List(); _imgListUpload.add(UploadFileInfo.fromBytes(imageData, name));multiImages就是存放Assets类型的图片数组，然后通过for循环遍历来批量添加图片
var dio = Dio();List upload = [];upload.add(dio.post( "http://120.27.138.91:3009/api/containers/images/upload", options: new Options( headers: {'Authorization':GetApiToken.getToken().toString() } ), data: FormData.from({"files": _imgListUpload != [] ? _imgListUpload : _imgListUpload = [] }), onSendProgress: (received, total) {if (total != -1) { setState(() {value = (received / total * 100)/100; }); print((received / total * 100).toStringAsFixed(0) + "%");} },));用dio批量上传