异常信息
在使用SliverFixedExtentList展示菜单列表时程序抛出一下异常：
I/flutter (21190): ◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤ I/flutter (21190): ════════════════════════════════════════════════════════════════════════════════════════════════════ I/flutter (21190): Another exception was thrown: A RenderFlex overflowed by 5.0 pixels on the bottom. I/flutter (21190): Another exception was thrown: A RenderFlex overflowed by 5.0 pixels on the bottom. I/flutter (21190): Another exception was thrown: A RenderFlex overflowed by 5.0 pixels on the bottom. I/flutter (21190): Another exception was thrown: A RenderFlex overflowed by 5.0 pixels on the bottom. I/flutter (21190): Another exception was thrown: A RenderFlex overflowed by 5.0 pixels on the bottom. I/flutter (21190): Another exception was thrown: A RenderFlex overflowed by 5.0 pixels on the bottom.
并且在程序的页面上也同样无法正常显示：
相关的代码如下：
SliverFixedExtentList( delegate: SliverChildBuilderDelegate((BuildContext context, int index) { String title = titles[index]; return Container( alignment: Alignment.centerLeft, child: InkWell( onTap: () { print("this is the item of " + title); }, child: Column( children: <Widget>[ Padding( padding: const EdgeInsets.all(15.0), child: Row( children: <Widget>[ Expanded( child: Text( title, style: TextStyle(fontSize: 16.0), ), ), rightArrowIcon ], ), ), Divider( height: 1.0, ) ], ), ), ); }, childCount: titles.length), itemExtent: 50.0, )
异常原因及解决方法
经过尝试此问题的原因是因为padding值设置的大小超过了外层widget的高度。相关代码：
padding: const EdgeInsets.all(15.0),
根据异常可看出超过了5.0 pixels（像素），那么将padding的值改为12.5或小于12.5则异常解决：
padding: const EdgeInsets.all(12.5),
或
padding: const EdgeInsets.all(10.0),
