https://blog.youkuaiyun.com/sinat_34073684zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/sinat_34073684/article/details/74153679https://blog.youkuaiyun.com/sinat_34073684/article/details/74153679sinat_34073684Sun, 02 Jul 2017 19:23:00 +0800https://blog.youkuaiyun.com/sinat_34073684/article/details/71433629https://blog.youkuaiyun.com/sinat_34073684/article/details/71433629sinat_34073684Mon, 08 May 2017 20:18:44 +0800https://blog.youkuaiyun.com/sinat_34073684/article/details/64520775https://blog.youkuaiyun.com/sinat_34073684/article/details/64520775sinat_34073684Tue, 21 Mar 2017 21:27:38 +0800定义两个全局变量与函数：private: QPoint startPos;//鼠标点击时的全局位置 QPoint startPos1;//鼠标点击时的相对位置 void mousePressEvent(QMouseEvent *event);//鼠标点击 void mouse]]>https://blog.youkuaiyun.com/sinat_34073684/article/details/62220110https://blog.youkuaiyun.com/sinat_34073684/article/details/62220110sinat_34073684Wed, 15 Mar 2017 12:52:35 +0800item(x,y)->text()进行访问。当item(x,y)内容不为空时不会报错；但是，当相应item(x,y)   中内容为空时,程序出错关闭，原因不明。 解决方法：在访问某个单元格之前先判断是否为空再进行读取，代码如下： if（]]>https://blog.youkuaiyun.com/sinat_34073684/article/details/62041094https://blog.youkuaiyun.com/sinat_34073684/article/details/62041094sinat_34073684Tue, 14 Mar 2017 12:45:30 +0800 pip install Scrapy                     结果显示：error: command 'C:\\Users\\rainer\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Py]]>