anchor.diff:          ///横向布局
           child: new Row(
             ///主轴居中,即是横向居中
  -          mainAxisAlignment: MainAxisAlignment.center,
  +          mainAxisAlignment: MainAxisAlignment.start,
   
             ///大小按照最大充满
             mainAxisSize: MainAxisSize.max,
  
positive.code:                     new Row(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: <Widget>[
                          _getBottomItem(Icons.star, "1000"),
                          _getBottomItem(Icons.link, "1000"),
                          _getBottomItem(Icons.subject, "1000"),
                        ],
  
negative.code: 
              ///间隔
              new Padding(padding: new EdgeInsets.all(5.0)),
              new Container(
                width: 60,
                child:
                ///显示数量文本
                new Text(
                  text,
                  style: new TextStyle(color: Colors.grey, fontSize: 14.0),
                  overflow: TextOverflow.ellipsis,
                  maxLines: 1,
                ),
              ),
            ],
          ),
  