Update README.md

qiliping2008 · Jan 22, 2021 · 8298d9b · 8298d9b
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@@ -75,6 +75,9 @@ https://www.cnblogs.com/linuxAndMcu/p/11002045.html
 - [x] 如何解决`undefined reference to 'vtable for'`<br>
 https://blog.csdn.net/yelede2009/article/details/65448433
 
+- [x] Qt 判断文件或文件夹是否存在及创建文件夹<br>
+https://blog.csdn.net/lusirking/article/details/51644782
+
 
 ### 自定义控件案例
 - [ ] 电池