drawer抽屉 / drawer的开关

 1. drawer的实现

drawer: Drawer(
          child: Column(
            children: <Widget>[
              Row(
                children: <Widget>[
                  Expanded(
                    child: UserAccountsDrawerHeader(
                      currentAccountPicture: CircleAvatar(
                        backgroundImage: NetworkImage('https://c-ssl.duitang.com/uploads/item/201712/22/20171222223729_d8HCB.jpeg'),
                      ),
                      accountName: Text('西大街'),
                      accountEmail: Text('data@qq.com'),
                    ),
                  ),
                ],
              ),
              Text('data')
            ],
          ),
        ),

 2. 通过点击icon打开drawer

leading: Builder(
            builder: (context) => GestureDetector(
              child: Padding(
                padding: EdgeInsets.all(8.0),
                child: IconButton(
                  icon: Icon(Icons.person),
                  onPressed: null,
                )
              ),
              onTap: () => Scaffold.of(context).openDrawer(),
            ),
          ),