flutter - Flutter:如何删除BottomNavigationBar的边框？

Question

我想删除BottomNavigationBar顶部的行，以便图标看起来是主屏幕的一部分。

但是我找不到任何方法来删除bottomnavigationbar的边框。

  bottomNavigationBar: BottomNavigationBar(
    onTap: onTabTapped,
    currentIndex: _currentIndex,
    backgroundColor: Colors.cyan[50],
    selectedItemColor: Colors.cyan[900],
    unselectedItemColor: Colors.grey[700],
    type: BottomNavigationBarType.fixed,
    items: [
      ..._tabItems.map((item) =>
          BottomNavigationBarItem(icon: item.icon, title: Text(item.title)))
    ],
  ),

如何删除该行？

Answer 1

它不是elevation的BottomNavigationBar的边界

只需在您的elevation: 0.0,中添加BottomNavigationBar即可

样本代码

  bottomNavigationBar: BottomNavigationBar(
    selectedIconTheme: IconThemeData(color: Colors.orange),
    unselectedIconTheme: IconThemeData(color: Colors.grey),
    elevation: 0.0,
    items: const <BottomNavigationBarItem>[
      BottomNavigationBarItem(
        icon: Icon(Icons.home),
        title: Text('Home'),
      ),
      BottomNavigationBarItem(
        icon: Icon(Icons.business),
        title: Text('Business'),
      ),
      BottomNavigationBarItem(
        icon: Icon(Icons.school),
        title: Text('Appointment'),
      ),
    ],
    currentIndex: _selectedIndex,
    selectedItemColor: Colors.amber[800],
    onTap: _onItemTapped,
  ),