Qt 两个窗口相互切换

#include "mainwidget.h" #include <QPushButton> MainWidget::MainWidget(QWidget *parent) : QWidget(parent) { resize(400,300); setWindowTitle("父窗体a"); qBtn.setText("打开子窗体a"); qBtn.setParent(this); qBtn.move(100,100); //处理父窗体按钮 connect(&qBtn,&QPushButton::clicked,this,&MainWidget::OpenSubWin); //处理子窗体信号 void(SubWidget:: *dealSubSig)()=&SubWidget::subSig; connect(&subWin,dealSubSig,this,&MainWidget::dealSlots); } void MainWidget::OpenSubWin() { subWin.setWindowTitle("子窗体a"); subWin.show(); this->hide(); } void MainWidget::dealSlots() { subWin.hide();//隐藏子窗体 this->show(); //显示父窗体 } MainWidget::~MainWidget() { }