底部导航在主屏幕上重复

Question

我正在安装底部导航，根据下面的屏幕截图，当我切换到右侧图标时，一切正常，但是当切换回来时，导航会重复，一个在另一个之上。< /p>

显示的页面是“首页”或人们登录时看到的第一页，在标签之间切换之前，导航是正常的。

这是怎么回事？

如果需要更多上下文，但导航栏位于名为 home 的 .dart 文件中，而主页内容（搜索栏上方）位于名为 results 的 .dart 页面中。

这是导航栏的代码

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  // Properties & Variables needed

  int currentTab = 0; // to keep track of active tab index
  final List<Widget> screens = [
    Settings(),
    MyHomePage(),
  ]; // to store nested tabs
  final PageStorageBucket bucket = PageStorageBucket();
  Widget currentScreen = Results(); // Our first view in viewport

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: PageStorage(
        child: currentScreen,
        bucket: bucket,
      ),
      
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.camera),
        backgroundColor: Color(0xff33333D),
        onPressed: () {},
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
      bottomNavigationBar: BottomAppBar(
        shape: CircularNotchedRectangle(),
        notchMargin: 0,
        child: Container(
          height: 60,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  MaterialButton(
                    minWidth: 125,
                    onPressed: () {
                      setState(() {
                        currentScreen =
                            Home(); // if user taps on this dashboard tab will be active
                        currentTab = 0;
                      });
                    },
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        Icon(
                          Icons.dashboard,
                          color: currentTab == 0
                              ? Color(0xff33333D)
                              : Color(0xffC6CBD1),
                        ),
                      ],
                    ),
                  ),
                ],
              ),

              // Right Tab bar icons

              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  MaterialButton(
                    minWidth: 125,
                    onPressed: () {
                      setState(() {
                        currentScreen =
                            Settings(); // if user taps on this dashboard tab will be active
                        currentTab = 2;
                      });
                    },
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        Icon(
                          Icons.dashboard,
                          color: currentTab == 2
                              ? Color(0xff33333D)
                              : Color(0xffC6CBD1),
                        ),
                      ],
                    ),
                  ),
                ],
              )
            ],
          ),
        ),
      ),
    );
  }
}