嵌入式 QT多界面切换

class twoForm : public QWidget
{
 Q_OBJECT
public:
 explicit twoForm(QWidget *parent = 0);
 ~twoForm();
signals:
void twoFormSendSignal(QString);//定义一个信号
}

窗口2发送信号：

void twoForm::doProcessTwoFormBtnToOneForm(bool)
{
 clinckCount++;
 //发送信号，通知第一个窗体
emit twoFormSendSignal(QString::number(clinckCount));
this->hide();
}

窗体1接收信号：

//在第一个窗体的构造函数中添加绑定
twoform = new twoForm ;
connect(twoform,SIGNAL(twoFormSendSignal(QString)),this,SLOT(doProcessTwoForm
Resquest(QString)));
void ontForm::doProcessTwoFormResquest(QString str)
{
qDebug() << str <
this->show();
}

2. 工程管理实现

实现功能：

点击返回;

弹出界面属性设置：

实例程序：

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include 
Widget::Widget(QWidget *parent) :
 QWidget(parent),
 ui(new Ui::Widget)
{
 ui->setupUi(this);
}
Widget::~Widget()
{
 delete ui;
}
void Widget::resizeEvent(QResizeEvent *event)
{
 setBackgroundImage(":/image/backgroup.jpg");
}
void Widget::setBackgroundImage(QString Image)
{
 //Qpixmap 是图片类，scaled 是缩放成为本窗口的大小
 QPixmap pixmap = QPixmap(Image).scaled(this->size());
 //QPalette 是调色板，palette 是指向背景的调色板
 QPalette palette(this->palette());
 //brush 是设置画刷，画刷上的颜色来自 Image
 palette.setBrush(QPalette::Background,QBrush(pixmap));
 //刷到背景上
 this->setPalette(palette);
}
void Widget::on_ledBtn_clicked()
{
 UiHwControl *uiHwControl = new UiHwControl();//注意，这里不能加 this
 int x,y,w,h;
 QRect rect = this->geometry(); //获取当前坐标和尺寸信息
 x=rect.x();
 y=rect.y()+ui->staWidget->height();
 w=rect.width();
 h=rect.height()-ui->staWidget->height();
 uiHwControl->setGeometry(x,y,w,h);
 uiHwControl->show();
 connect(ui->backBtn,SIGNAL(clicked()),uiHwControl,SLOT(deleteLater()));
}

 uihwcontrol.cpp

#include "uihwcontrol.h"
#include "ui_uihwcontrol.h"
UiHwControl::UiHwControl(QWidget *parent) :
 QWidget(parent),
 ui(new Ui::UiHwControl)
{
 ui->setupUi(this);
 this->setWindowFlag(Qt::FramelessWindowHint); //不显示标题栏
}
UiHwControl::~UiHwControl()
{
 delete ui;
}