Chinese

问题我解决了，写成了一篇博客，有需要的可以去看看
https://www.cnblogs.com/mgshadow/p/17813338.html

@LyLamp If you want to post in Chinese please do it here: https://forum.qt.io/category/37/chinese

@Iaybf 可以搜索QXlsx，https://github.com/QtExcel/QXlsx

Moved to Chinese forum

@jsulm During the above process of using QGraphicsView, I wanted to use OpenGL to accelerate, but there was a situation where the loaded map gradually diluted or even disappeared after zooming in. Why is this? If commented out_ GraphicsView ->setViewport (gl); With this line of code, there will be no problem, solve the problem
Thanks for replying !!!