圆形图标弹出菜单的正确波纹效果形状

Correct ripple effect shape for circular icon popup menu

在 Flutter 中,我想为带有圆形边框的图标按钮设置样式,并使 Material 波纹效果正常工作,以便波纹效果包含在圆圈中。在下面的代码中,第一个按钮工作正常。在第二个(弹出)按钮中,波纹效果延伸到按钮周围的正方形,而不是局限于圆形边框。

MaterialApp(
  home: Scaffold(
    body: Center(
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          Container(
            decoration: BoxDecoration(
              border: Border.all(color: Colors.black, width: 2),
              shape: BoxShape.circle,
            ),
            child: MaterialButton(
              minWidth: 0,
              padding: EdgeInsets.all(0.0),
              child: Padding(
                padding: EdgeInsets.all(11.0),
                child: Icon(Icons.home, size: 27.0),
              ),
              shape: CircleBorder(),
              onPressed: () {},
            ),
          ),
          PopupMenuButton<String>(
            onSelected: (String action) {},
            child: Container(
              decoration: BoxDecoration(
                border: Border.all(color: Colors.black, width: 2),
                shape: BoxShape.circle,
              ),
              child: Padding(
                padding: EdgeInsets.all(11.0),
                child: Icon(Icons.menu, size: 27.0),
              ),
            ),
            itemBuilder: (BuildContext context) => [
              PopupMenuItem<String>(child: ListTile(title: Text('Log Out'))),
            ],
          ),
        ],
      ),
    ),
  ),
);

有没有办法让弹出按钮正常工作?

您需要使用 ClipRRect 以及 Material:

ClipRRect(
  borderRadius: BorderRadius.circular(24),
  child: Material(
    color: Colors.transparent,
    child: PopupMenuButton<String>(
    ...

PopupMenuButtonInkWell 包裹 child,出于某种原因,除非也包裹在 Material.

中,否则不会被剪裁