Flutter学习(二)

1.抽屉 drawer(左侧) endDrawer(右侧)
通常在Scaffold中使用
UserAccountsDrawerHeader用于展示用户账户信息
CircleAvatar圆形图片控件

Widget _createDrawerView() {
    return new Drawer(
      child: new ListView(
        children: <Widget>[
          UserAccountsDrawerHeader(
              accountName: Text("xxx"),
              accountEmail: Text("xxx@163.com"),
              currentAccountPicture: new CircleAvatar(
                backgroundImage: AssetImage("images/bg.jpeg"),
              )
          ),
          ListTile(
            leading: CircleAvatar(
              child: Text("A")
            ),
            title: Text("itemA"),
            onTap: (){
              Navigator.pop(context);
            },
          ),
          ListTile(
            leading: CircleAvatar(
                child: Icon(Icons.favorite)
            ),
            title: Text("itemB"),
            onTap: (){
              Navigator.pop(context);
            },
          ),
          ListTile(
            leading: new CircleAvatar(
              backgroundImage: AssetImage("images/bg.jpeg"),
            ),
            title: Text("itemC"),
            onTap: (){
              Navigator.pop(context);
            },
          ),
        ],
      ),
    );
  }

2.悬浮按钮

    this.child,//按钮显示的内容
    this.tooltip,//长按时显示的提示
    this.foregroundColor,//前景色，影响到文字颜色
    this.backgroundColor,//背景色
    this.heroTag = const _DefaultHeroTag(),//hero效果使用的tag,系统默认会给所有FAB使用同一个tag,方便做动画效果
    this.elevation = 6.0,//未点击时阴影值
    this.highlightElevation = 12.0,//点击下阴影值
    this.onPressed//点击事件
    this.mini = false,//FloatingActionButton有regular, mini, extended三种类型，默认为false即regular类型,true时按钮变小即mini类型，extended需要通过FloatingActionButton.extended()创建，可以定制显示内容
    this.shape = const CircleBorder(),//定义FAB的shape，设置shape时，默认的elevation将会失效,默认为CircleBorder
    this.clipBehavior = Clip.none,
    this.materialTapTargetSize,
    this.isExtended = false,//是否为”extended”类型

3.AlertDialog

showDialog(context: mContext,builder: (mContext) =>AlertDialog(title: Text("xxxxxx"),));