Widget _customBgColor(BuildContext context) {
    return TDBottomTabBar(TDBottomTabBarBasicType.iconText,
        useVerticalDivider: false,
        selectedBgColor: TDTheme.of(context).errorColor3,
        unselectedBgColor: TDTheme.of(context).grayColor3,
        navigationTabs: [
          TDBottomTabBarTabConfig(
            tabText: '标签',
            selectedIcon: _selectedIcon,
            unselectedIcon: _unSelectedIcon,
            onTap: () {
              onTapTab(context, '标签1');
            },
          ),
          TDBottomTabBarTabConfig(
            tabText: '标签',
            selectedIcon: _selectedIcon,
            unselectedIcon: _unSelectedIcon,
            onTap: () {
              onTapTab(context, '标签2');
            },
          ),
          TDBottomTabBarTabConfig(
            tabText: '标签',
            selectedIcon: _selectedIcon,
            unselectedIcon: _unSelectedIcon,
            onTap: () {
              onTapTab(context, '标签2');
            },
          ),
          TDBottomTabBarTabConfig(
            tabText: '标签',
            selectedIcon: _selectedIcon,
            unselectedIcon: _unSelectedIcon,
            onTap: () {
              onTapTab(context, '标签2');
            },
          ),
          TDBottomTabBarTabConfig(
            tabText: '标签',
            selectedIcon: _selectedIcon,
            unselectedIcon: _unSelectedIcon,
            onTap: () {
              onTapTab(context, '标签2');
            },
          ),
        ]);
  }