【Flutter】Icon

FlutterのBottomNavigationBarItemについて紹介します。

BottomNavigationBarItem

              items: [
                new BottomNavigationBarItem(
                    icon: new Icon(Icons.check_circle)),
                new BottomNavigationBarItem(
                    icon: new Icon(Icons.check_circle)),
                new BottomNavigationBarItem(
                    icon: new Icon(Icons.check_circle)),
                new BottomNavigationBarItem(
                    icon: new Icon(Icons.check_circle)),
              ],

The following assertion was thrown building HomePage(dirty, state: _HomePageState#13ab9):
Every item must have a non-null label
'package:flutter/src/material/bottom_navigation_bar.dart':
Failed assertion: line 204 pos 9: 'items.every((BottomNavigationBarItem item) => item.label != null)'

【Flutter入門】iOS、Android、Windowsアプリ開発

FlutterによるiOS、Android、Windowsアプリ開発について入門者向けに紹介します。

flutter.joho.info

2019.11.17