自定义添加selectionOverlay完全被挡住了

[LiFuPeng]

selectionOverlay: Container(
decoration: BoxDecoration(borderRadius: BorderRadiusDirectional.horizontal(
start: Radius.circular(16),
end: Radius.circular(16),
),
),
margin: EdgeInsetsDirectional.only(
start: 20,
end: 20,
),
height: 50,
color: CupertinoDynamicColor.resolve(const Color.fromRGBO(245, 246, 248, 1), context),),

完整代码：

@OverRide
Widget build(BuildContext context) {
return Picker(
hideHeader: true,
adapter: PickerDataAdapter(
pickerData: ages.map((e) => '${e['label']}岁').toList(),
isArray: false,
),
height: widget.height,
itemExtent: 50.w,
textAlign: TextAlign.center,
textStyle: TextStyle(color: const Color.fromRGBO(105, 115, 128, 1),
fontSize: 15.sp, fontWeight: FontsUtils.R,
fontFamily: FontsUtils.OPPOSansR,
),

  selectedTextStyle: TextStyle(color: const Color.fromRGBO(2, 17, 31, 1),
    fontSize: 15.sp, fontWeight: FontsUtils.R,
    fontFamily: FontsUtils.OPPOSansR,
  ),

  selectionOverlay: Container(
    decoration: BoxDecoration(borderRadius: BorderRadiusDirectional.horizontal(
      start: Radius.circular(16.w),
      end: Radius.circular(16.w),
    ),),

    margin: EdgeInsetsDirectional.only(
      start: 20.w,
      end: 20.w,
    ),
    height: 50.w,
    // color: const Color.fromRGBO(245, 246, 248, 1).withOpacity(0.5),
    color: CupertinoDynamicColor.resolve(const Color.fromRGBO(245, 246, 248, 1), context),
  ),
  // selectionOverlay: const CupertinoPickerDefaultSelectionOverlay(background: Color.fromRGBO(245, 246, 248, 1),),

  backgroundColor: Colors.transparent,
  selecteds: _defaultSelecteds,
  onSelect: (Picker picker, int index, List<int> selected) {
    print(selected);
    _selectAge(index);
  },
).makePicker();

}