error with maxImage when set value more than 1 [only IOS]

[YouSour]

hi , i got a problem with this package only on IOS when i set maxImages value more than 1 when i choose a image and then i got an error output like this :
Unhandled Exception: type 'String' is not a subtype of type 'List<dynamic>?' in type cast
any idea , pls share , thank in advance

[deandreamatias]

Hi @YouSour!
Do you have a minimal code example of this?
Thanks!

[YouSour]

@deandreamatias here
flutter_form_builder: ^7.1.1
form_builder_image_picker: ^2.0.0

import 'package:flutter_form_builder/flutter_form_builder.dart';

...

final _formKey = GlobalKey<FormBuilderState>();

...

@override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
        FormBuilder(
          key: _formKey,
          autovalidateMode: AutovalidateMode.disabled,
          child: Column(
            children: <Widget>[
             FormBuilderImagePicker(
                      name: 'images',
                      decoration: CustomDecoration.formFieldDecoration(
                          label: 'Pick Photos'),
                      displayCustomType: (obj) =>
                          obj is ProductImageModel ? obj.filePath : obj,
                      valueTransformer: (List<dynamic>? images) {
                        return images?.map((image) {
                          return image is ProductImageModel
                              ? ProductImageModel(
                                      fileName: image.fileName,
                                      filePathFromDevice:
                                          image.filePathFromDevice,
                                      filePath: image.filePath)
                                  .toJson()
                              : ProductImageModel(
                                  fileName: XFileImage(file: image).file.name,
                                  filePathFromDevice:
                                      XFileImage(file: image).file.path,
                                ).toJson();
                        }).toList();
                      },
                      maxImages: 2,
                    ),

            ],
          ),
        ),
        Row(
          children: <Widget>[
            Expanded(
              child: MaterialButton(
                color: Theme.of(context).colorScheme.secondary,
                child: const Text(
                  "Submit",
                  style: TextStyle(color: Colors.white),
                ),
                onPressed: () {
                  _formKey.currentState!.save();
                  if (_formKey.currentState!.validate()) {
                    print(_formKey.currentState!.value);
                  } else {
                    print("validation failed");
                  }
                },
              ),
            ),
            const SizedBox(width: 20),
            Expanded(
              child: MaterialButton(
                color: Theme.of(context).colorScheme.secondary,
                child: const Text(
                  "Reset",
                  style: TextStyle(color: Colors.white),
                ),
                onPressed: () {
                  _formKey.currentState!.reset();
                },
              ),
            ),
          ],
        )
      ],
    );
  }

[deandreamatias]

Thanks for sample code.
I'm working now in a update to Flutter 3 with PR #28
When I has time, I take a look to this bug.
Meanwhile, if other person or you want try fix this bug, I will apreciate

[YouSour]

@deandreamatias ok, i appreciate that 😄

[mvarendorff]

I could not reproduce this on a Simulator device with version 4.0.1 of this package.