getDirectoryPath not open selection window

[nofacer]

Describe the bug
await FilePicker.platform.getDirectoryPath() doesn't pop up selection window

Platform

• Android
• iOS
• Web
• Desktop

Platform OS version
MacOS 15.3
Flutter 3.27.3
Dart 3.6.1
file_picker 8.3.3

How are you picking?

Positioned(
          right: 16.0,
          bottom: 16.0,
          child: Row(
            mainAxisSize: MainAxisSize.min,
            children: [
              if (_count > 0) ...[
                FloatingActionButton(
                  onPressed: () async {
                    print(11);
                    String? selectedDirectory =
                        await FilePicker.platform.getDirectoryPath();
                    print(selectedDirectory);
                  },
                  child: Icon(Icons.download),
                ),
                SizedBox(width: 12.0),
              ],
              FloatingActionButton(
                onPressed: () {
                  setState(() {
                    _count++;
                  });
                },
                child: Icon(Icons.refresh),
              ),
            ],
          ),
        ),

Details to reproduce the issue
You can use the code above

Error Log
No error but it just returns null without opening up selection window.

Flutter Version details

[✓] Flutter (Channel stable, 3.27.3, on macOS 15.3 24D60 darwin-arm64, locale en-CN)
    • Flutter version 3.27.3 on channel stable at /Users/posinorth/opt/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c519ee916e (3 weeks ago), 2025-01-21 10:32:23 -0800
    • Engine revision e672b006cb
    • Dart version 3.6.1
    • DevTools version 2.40.2
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[!] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/posinorth/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/to/macos-android-setup for more details.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16C5032a
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/to/macos-android-setup for detailed instructions).

[✓] IntelliJ IDEA Community Edition (version 2024.3.2.2)
    • IntelliJ at /Users/posinorth/Applications/IntelliJ IDEA Community Edition.app
    • Flutter plugin version 83.0.4
    • Dart plugin version 243.23654.44

[✓] VS Code (version 1.96.4)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (3 available)
    • macOS (desktop)                 • macos                 • darwin-arm64   • macOS 15.3 24D60 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin         • macOS 15.3 24D60 darwin-arm64
    • Chrome (web)                    • chrome                • web-javascript • Google Chrome 132.0.6834.160

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 2 categories.

Additional context
Roll back to 8.1.7 works well.

[milesegan]

I'm seeing something similar but with 8.1.4.

[milesegan]

I think the issue is that the NSOpenPanel code needs to always be called on the main thread. When I make this change it works for me again:

  private func handleDirectorySelection(
    _ call: FlutterMethodCall, result: @escaping FlutterResult
  ) {
    Task { @MainActor in
      let dialog = NSOpenPanel()
      let args = call.arguments as! [String: Any]

      dialog.directoryURL = URL(
        fileURLWithPath: args["initialDirectory"] as? String ?? ""
      )
      dialog.showsHiddenFiles = false
      dialog.allowsMultipleSelection = false
      dialog.canChooseDirectories = true
      dialog.canChooseFiles = false

      if dialog.runModal() == NSApplication.ModalResponse.OK {
        if let url = dialog.url {
          result(url.path)
          return
        }
      }
      // User dismissed the dialog
      result(nil)
    }
  }

I can submit a PR to do this for the other functions if @miguelpruivo agrees this is the right solution.

[Zhoucheng133]

Same issue on my Mac

If I use the example code:

String? selectedDirectory = await FilePicker.platform.getDirectoryPath();

selectedDirectoryalways be null without any selection panel.

[milesegan]

@Zhoucheng133 does this fork work for you?

https://github.com/milesegan/flutter_file_picker

[Zhoucheng133]

@Zhoucheng133 does this fork work for you?

https://github.com/milesegan/flutter_file_picker

I use previous version and it works!

file_picker: 8.1.7  # without ^

[milesegan]

@Zhoucheng133 It would be interesting to see if that branch fixes your issue because rolling back to an old version is not a long term solution.

[Zhoucheng133]

@Zhoucheng133 It would be interesting to see if that branch fixes your issue because rolling back to an old version is not a long term solution.

I have tried your fork and it does not worked as well ;w;

[milesegan]

@Zhoucheng133 thanks for trying it. Is your app running with app sandbox enabled?