flutter中snckBar部件

snckBar部件用来在底部提示一些信息

const SnackBar({
  Key key,
  @required this.content,//提示内容
  this.backgroundColor,//背景
  this.elevation,//阴影
  this.shape,
  this.behavior,
  this.action,//左侧信息
  this.duration = _snackBarDisplayDuration,
  this.animation,
  this.onVisible,
})

RaisedButton(
  child: Text('snckBar部件'),
  onPressed:()  {
    Scaffold.of(context).showSnackBar(
        SnackBar(
          content: Text('底部通知'),
          action: SnackBarAction(
            label: 'OK',
            onPressed: (){},

          ),
        )
    );
  },
),