colors - Flutter PopupMenu 更改图标颜色

Question

如何更改 PopupMenuButton 上的图标颜色，我将 Theme 与 iconTheme 一起使用，但它不会影响 CheckedPopupMenuItem 或 PopupMenuItem 上的图标。

Scaffold(
      backgroundColor: Colors.transparent,
      appBar: AppBar(
        elevation: 0.0,
        backgroundColor: Colors.transparent,
        actions: <Widget>[
          Theme(
            data: Theme.of(context).copyWith(
              cardColor: Colors.indigo,
              iconTheme: IconThemeData(color: Colors.white),
            ),
            child: ListTileTheme(
              iconColor: Colors.white,
              child: PopupMenuButton<String>(
                onSelected: _showCheckedMenuSelections,
                itemBuilder: (BuildContext context) => <PopupMenuEntry<String>>[
                  CheckedPopupMenuItem<String>(
                    value: _checkedValue1,
                    checked: _showRoles,
                    child: Text(_checkedValue1, style: Theme.of(context).textTheme.body1),
                  ),
                  const PopupMenuDivider(),
                  PopupMenuItem<String>(
                    value: 'Get Link',
                    child: ListTile(
                      leading: Icon(Icons.phonelink),
                      title: Text('Get link', style: Theme.of(context).textTheme.body1),
                    ),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),

结果是这样的:

Answer 1

就这样

 appBar: AppBar(
          iconTheme: IconThemeData(color: Colors.white, size: 10.0),
          elevation: 4.0,
          backgroundColor: Colors.black,
)