iosPlatformView method

Implementation

Widget iosPlatformView(
  String viewType,
  ValueNotifier<bool> isDetachedValueNotifier,
  ValueNotifier<bool> isLoadingValueNotifier,
  Widget? faceMaskOverlay,
  Widget? onLoadingWidget,
  Map<String, dynamic> creationParams,
) {
  return ValueListenableBuilder<bool>(
    valueListenable: isDetachedValueNotifier,
    builder: (context, isDetached, _) {
      return ValueListenableBuilder<bool>(
        valueListenable: isLoadingValueNotifier,
        builder: (context, isLoading, child) {
          return Stack(
            children: <Widget>[
              if (!isDetached) // Only build UiKitView if not detached
                UiKitView(
                  viewType: viewType,
                  layoutDirection: TextDirection.ltr,
                  creationParams: creationParams,
                  creationParamsCodec: const StandardMessageCodec(),
                  gestureRecognizers: const <Factory<
                      OneSequenceGestureRecognizer>>{},
                  onPlatformViewCreated: (int id) {
                    // Ensure the listener is only added once or managed appropriately
                    // if this widget can be rebuilt.
                    // A simple way for this example:
                    void listener() {
                      if (isDetachedValueNotifier.value) {
                        methodChannel.invokeMethod('detach');
                        // TODO: removing the listener if it's a one-time event
                        // or if the view controller for this id will be disposed.
                        // isDetachedValueNotifier.removeListener(listener);
                      }
                    }

                    // Remove any existing listener before adding a new one if the widget can rebuild
                    // This is a simplistic approach; a more robust solution might involve
                    // managing the listener lifecycle more carefully, e.g., in a StatefulWidget's dispose method.
                    isDetachedValueNotifier.removeListener(
                        () {}); // Placeholder for actual removal if needed
                    isDetachedValueNotifier.addListener(listener);
                  },
                )
              else
                const SizedBox.shrink(),
              faceMaskOverlay ?? const SizedBox.shrink(),
              if (isLoading || isDetached)
                onLoadingWidget ??
                    const Center(
                      child: CircularProgressIndicator(),
                    )
              else
                const SizedBox.shrink(),
            ],
          );
        },
      );
    },
  );
}