1、本程序基于QWidget實現，可以動態顯示鐘表，并且可以添加鈴聲頭文件widget.h代碼如下：#ifndef WIDGET_H#define WIDGET_H#include <QWidget>#include<QTime>#include<QTimer>#include<QLabel>#include<QPushButton>#include<QVBoxLayout>#include<QHBoxLayout>#include<QTimeEdit>#include<QLCDNumber>

2、;#include<QVariant>#include<QAction>#include<QMenu>#include<QCloseEvent>#include<QApplication>#include<QMessageBox>#include<QSystemTrayIcon>namespace Ui class Widget;class Widget : public QWidget Q_OBJECTpublic: explicit Widget(QWidget *parent = 0); Widget()

3、;signals: void isCurrentTime();private: Ui:Widget *ui; void init(); void layout(); void con(); QLCDNumber *lcdNumber; QLabel *label; QTimeEdit *timeEdit; QPushButton *button; QTimer *timer; QTimer *uptimer; QTimer *dtimer; QTimer *itimer; QRect rect; int x; int y; double du; QSystemTrayIcon *trayIco

4、n; QAction *restoreAct; QAction *quitAct; QMenu *trayIconMenu;private slots: void clockChange(); void dialogUp(); void mini(); void down(); void comToCur();protected: void closeEvent(QCloseEvent *e);#endif / WIDGET_H源文件widget.cpp代碼如下：#include "widget.h"#include "ui_widget.h"#incl

5、ude<QtDebug>#include<QApplication>#include<QDesktopWidget>Widget:Widget(QWidget *parent) : QWidget(parent), ui(new Ui:Widget) ui->setupUi(this); init(); layout(); con(); void Widget:init() setWindowTitle("我的鬧鐘"); setFixedSize(300,80); timer=new QTimer; uptimer=new QTim

6、er; dtimer=new QTimer; itimer=new QTimer; lcdNumber=new QLCDNumber; lcdNumber->setFixedSize(150,50); lcdNumber->setDigitCount(12); lcdNumber->setSegmentStyle(QLCDNumber:Flat); lcdNumber->display(QTime:currentTime().toString("hh:mm:ss:zzz"); label=new QLabel("鬧鐘"); tim

7、eEdit=new QTimeEdit; timeEdit->setDisplayFormat("hh:mm:ss"); button=new QPushButton("確定"); trayIcon=new QSystemTrayIcon; trayIcon->setIcon(QIcon(":/new/prefix1/clock.ico"); trayIcon->show(); setWindowIcon(QIcon(":/new/prefix1/clock.ico"); restoreAct=n

8、ew QAction("顯示",this); quitAct=new QAction("退出",this); trayIconMenu=new QMenu; trayIconMenu->addAction(restoreAct); trayIconMenu->addAction(quitAct); trayIcon->setContextMenu(trayIconMenu); setWindowFlags(Qt:WindowStaysOnTopHint);void Widget:layout() QHBoxLayout *rightTo

9、pLay=new QHBoxLayout; rightTopLay->addWidget(label); rightTopLay->addWidget(timeEdit); QHBoxLayout *rightButtonLay=new QHBoxLayout; rightButtonLay->addStretch(); rightButtonLay->addWidget(button); QVBoxLayout *rightLay=new QVBoxLayout; rightLay->addLayout(rightTopLay); rightLay->ad

10、dLayout(rightButtonLay); rightLay->addStretch(); QHBoxLayout *m=new QHBoxLayout; m->addWidget(lcdNumber); m->addLayout(rightLay); setLayout(m); QDesktopWidget *p=new QDesktopWidget; p=QApplication:desktop();/ rect=p->rect(); x=rect.right()-width()-2;/ y=rect.bottom()+30;/ setGeometry(x,y

11、,width(),height();void Widget:con() connect(timer,SIGNAL(timeout(),this,SLOT(clockChange(); timer->start(1); connect(uptimer,SIGNAL(timeout(),this,SLOT(dialogUp(); uptimer->start(20); connect(dtimer,SIGNAL(timeout(),this,SLOT(down(); dtimer->start(20); connect(button,SIGNAL(clicked(bool),dt

12、imer,SIGNAL(timeout(); connect(button,SIGNAL(clicked(bool),this,SLOT(mini(); connect(itimer,SIGNAL(timeout(),this,SLOT(comToCur(); itimer->start(20); connect(restoreAct,SIGNAL(triggered(bool),uptimer,SIGNAL(timeout(); connect(this,SIGNAL(isCurrentTime(),uptimer,SIGNAL(timeout(); connect(itimer,SI

13、GNAL(timeout(),this,SLOT(comToCur(); itimer->start(20); connect(quitAct,SIGNAL(triggered(bool),this,SLOT(close();void Widget:clockChange() lcdNumber->display(QTime:currentTime().toString("hh:mm:ss:zzz");void Widget:dialogUp() show(); uptimer->start(20); if(y>=rect.bottom()-heig

14、ht()-50) y-=2; else uptimer->stop(); setGeometry(x,y,width(),height();void Widget:down() dtimer->start(20); if(y<rect.bottom() y+=height()+20; else dtimer->stop(); setGeometry(x,y,width(),height();void Widget:mini() hide();void Widget:closeEvent(QCloseEvent *e) QMessageBox:information(0,&qu