Qt5.8 打开指定路径txt文件 读写TXT文件

[{"title":"（ 7 个子文件 25KB ） Qt5.8 打开指定路径txt文件 读写TXT文件","children":[{"title":"Txt_Demo","children":[{"title":"请先创建此文件夹 并在read中创建txt文件.png <span style='color:#111;'> 19.81KB </span>","children":null,"spread":false},{"title":"widget.ui <span style='color:#111;'> 1.79KB </span>","children":null,"spread":false},{"title":"Txt_Demo.pro.user <span style='color:#111;'> 22.88KB </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 175B </span>","children":null,"spread":false},{"title":"widget.cpp <span style='color:#111;'> 1.94KB </span>","children":null,"spread":false},{"title":"widget.h <span style='color:#111;'> 348B </span>","children":null,"spread":false},{"title":"Txt_Demo.pro <span style='color:#111;'> 1011B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]