QT多个按键同时按下的实现方法

[{"title":"（ 6 个子文件 4KB ） QT多个按键同时按下的实现方法","children":[{"title":"untitled","children":[{"title":"untitled.pro.user <span style='color:#111;'> 31.84KB </span>","children":null,"spread":false},{"title":"mainwindow.cpp <span style='color:#111;'> 1.86KB </span>","children":null,"spread":false},{"title":"mainwindow.h <span style='color:#111;'> 491B </span>","children":null,"spread":false},{"title":"untitled.pro <span style='color:#111;'> 381B </span>","children":null,"spread":false},{"title":"main.cpp <span style='color:#111;'> 187B </span>","children":null,"spread":false},{"title":"mainwindow.ui <span style='color:#111;'> 1.42KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]