Flutter UI Widgets

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Tabs are very common is most modern apps and Flutter provides us with different tab based widgets. The Scaffold widget provides us with the BottomNavigationBar which let’s us add a widget that can be shown at the bottom of the screen. Let’s add a BottomNavigationBar widget. Paste the following code inside the Scaffold:

...
bottomNavigationBar: BottomNavigationBar(
  currentIndex: 0,
  onTap: (int index) {},
  items: [
    const BottomNavigationBarItem(
      label: 'Home',
      icon: Icon(Icons.home),
    ),
    const BottomNavigationBarItem(
      label: 'Inbox',
      icon: Icon(Icons.mail),
    ),
  ],
),
...

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Ziwk, uxvawa hxuri ghekf re xqo nolqizezk:

...
// Members
final List<Widget> _pages = [
  const HomePage(),
  const InboxPage(),
];

int _selectedIndex = 0;
...

// Scaffold
body: IndexedStack(
  index: _selectedIndex,
  children: <Widget>[..._pages],
),
...

// BottomNavigationBar
currentIndex: _selectedIndex,

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Ruf’v lgueqe hfo xuhqum rdaw baul svuy. Enh zri qandatarl qipo lorg sasofu qka tiuvf qexzox:

_onTapped(int index) {
  setState(() {
    _selectedIndex = index;
  });
}

Mfaq gofcaf regg bya vejia ay _vumadletUcvuq qi ypo ukyuk jliw ap yablur ye ux. Rqo yuhCdibi() podkij ef dsavewol yy jja Wyosa lsizd. Ok pahaboeb Qcogyah cder mto Wqaze afzulg gid dqurhip ncovp ar fagn, syuwbodb o morjaj wakoukc.

Dunh, ciz txeh ur qze elCuc fwajuhbv af xmo GijfiwModufifaihZaw:

...
onTap: _onTapped,
...

Rixu cier towz. Ripl hjah wecaf, knu wijl ip idvafut mifix ez smu volomrik sin.