Qt 两个窗口相互切换

[{"title":"（ 7 个子文件 4KB ） Qt 两个窗口相互切换","children":[{"title":"demo1","children":[{"title":"main.cpp <span style='color:#111;'> 183B </span>","children":null,"spread":false},{"title":"subwidget.cpp <span style='color:#111;'> 373B </span>","children":null,"spread":false},{"title":"demo1.pro <span style='color:#111;'> 1.00KB </span>","children":null,"spread":false},{"title":"demo1.pro.user <span style='color:#111;'> 22.32KB </span>","children":null,"spread":false},{"title":"mainwidget.h <span style='color:#111;'> 395B </span>","children":null,"spread":false},{"title":"mainwidget.cpp <span style='color:#111;'> 801B </span>","children":null,"spread":false},{"title":"subwidget.h <span style='color:#111;'> 321B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]