飘动-添加边框

          Container(
              height: 34,
              decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(17),///圆角
                  border: Border.all(color: colorE6E6E6,width: 1)///边框颜色、宽
              ),
              child:  Row(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                  SizedBox(width: 10,),
                  Image.asset("images/message-top-search.png",width: 17,height: 17,),
                  SizedBox(width: 10,),
                  Expanded(
                    child: TextField(
                      style: TextStyle(
                          fontSize: 13,
                          color: color333333
                      ),///输入时文字样式
                      cursorColor: themeColor,///光标颜色
                      maxLines: 1,
                      decoration: InputDecoration(
                        labelText: '搜索您想咨询的问题',///默认文字
                        border: InputBorder.none,///去掉下划线
                        hintStyle: TextStyle(
                            color: color999999
                        ),///默认文字样式
                      ),
                    ),
                  ),
                ],
              ),
            )