BottomNavigationBar( type: BottomNavigationBarType.fixed, onTap: (value){ if more then 3 items,, use this. 本文共 167 字，大约阅读时间需要 1 分钟。
BottomNavigationBar( type: BottomNavigationBarType.fixed, onTap: (value){ if more then 3 items,, use this. 转载于:https://www.cnblogs.com/pythonClub/p/10758837.html