QT/QMessageBox/QTimerEvent/使用定时器制作一个闹钟

1.使用定时器制作一个闹钟

代码：

widget.cpp:

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget), speecher(new QTextToSpeech(this))//给语音对象申请空间
{ui->setupUi(this);this->setWindowTitle("闹钟");//设置窗口标题this->setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//设置窗口图标this->setWindowFlag(Qt::FramelessWindowHint);//隐藏窗口图标this->setAttribute(Qt::WA_TranslucentBackground);//去除多余空白部分}Widget::~Widget()
{delete ui;
}void Widget::timerEvent(QTimerEvent *e)
{if(e->timerId()==id){//获取系统时间,并显示QTime sys_time=QTime::currentTime();//获取当前时间QString time_str=sys_time.toString("hh:mm:ss");//将获取的时间格式转为字符串ui->sys_time->setText(time_str);//显示到标签ui->sys_time->setAlignment(Qt::AlignCenter);//居中显示}if(e->timerId()==id2){for(int i=0;i<5;i++){//设置响铃次数speecher->say(ui->labtext->text());}killTimer(id2);//关闭闹钟}}void Widget::on_pushButton_clicked()
{static int SS;QString Str=ui->lineEdit->text();//获取行编辑器内容static int flag=0;if(flag%2==0){//QString Str=ui->lineEdit->text();//获取行编辑器内容//对字符串进行处理QStringList stringList=Str.split(":");//分割QString h=stringList[0];//小时QString m=stringList[1];//分钟QString s=stringList[2];//秒//将字符串转换为整数bool ok1,ok2,ok3;int H=h.toInt(&ok1,10);int M=m.toInt(&ok2,10);int S=s.toInt(&ok3,10);if(ok1==false||ok2==false||ok3==false||H>24||M>60||S>60){QMessageBox box;box.setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//自定义窗口图标box.setWindowTitle("闹钟设置不合法");box.setText("示例:小时:分钟:秒");box.addButton(QMessageBox::Ok);int retb=box.exec();//调用对话框if(retb==QMessageBox::Ok){ui->lineEdit->clear();//清空行编辑器内容}}else{//判断闹钟设置是否合法//qDebug() << H <<" " << M << " " << S;SS=H*60*60+M*60+S;//总秒数//弹出对话框，提示设置闹钟声音内容QMessageBox BOX;BOX.setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//自定义窗口图标BOX.setWindowTitle("提示");BOX.setText("设置闹钟文本");BOX.addButton(QMessageBox::Ok);int ret=BOX.exec();//调用对话框if(ret==QMessageBox::Ok){ui->lineEdit->setPlaceholderText("输入闹钟文本");//设置占位ui->lineEdit->clear();//清空行编辑器内容}}}else if(flag%2==1){//将行编辑内容放入到textlab中ui->labtext->setText(Str);ui->labtext->setAlignment(Qt::AlignLeft);//左对齐显示ui->lineEdit->setPlaceholderText("设置时间x:x:x");//设置占位ui->lineEdit->clear();//清空行编辑器内容//获取当前时间QTime sys_time=QTime::currentTime();//获取当前时间QString time_str=sys_time.toString("hh:mm:ss");//将获取的时间格式转为字符串//对字符串进行处理QStringList stringList=time_str.split(":");//分割QString hh=stringList[0];//小时QString mm=stringList[1];//分钟QString ss=stringList[2];//秒//将字符串转为整数bool ok;int HH=hh.toInt(&ok,10);int MM=mm.toInt(&ok,10);int Ss=ss.toInt(&ok,10);int TSS=HH*60*60+MM*60+Ss;//设置一个闹钟id2=startTimer((SS-TSS)*1000);}flag++;
}

main.cpp:

#include "widget.h"#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.id=w.startTimer(1000);//设置一个定时器w.show();return a.exec();
}

widget.h:

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QTimerEvent>
#include <QTime>
#include <QDebug>
#include <QMessageBox>
#include <QTextToSpeech> //文本转语语音
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();void timerEvent(QTimerEvent *e);//重写定时器函数事件声明int id;//定时器idint id2;//闹钟定时器int id3;//定义闹钟响铃间隔时间
private slots:void on_pushButton_clicked();private:Ui::Widget *ui;QTextToSpeech *speecher;//定义语言成员
};
#endif // WIDGET_H

widget.ui:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>Widget</class><widget class="QWidget" name="Widget"><property name="geometry"><rect><x>0</x><y>0</y><width>458</width><height>600</height></rect></property><property name="font"><font><pointsize>9</pointsize></font></property><property name="windowTitle"><string>Widget</string></property><property name="styleSheet"><string notr="true">*{background-color: rgb(255, 255, 255);
}
#frame{border-image: url(:/Logo/shanChuan.jpg);
}
#frame_2{background-color: rgba(186, 186, 186, 120);border-radius:10px;
}
#sys_time{background:transparent; /*完全透明*/font: 9pt &quot;宋体&quot;;color: rgba(255, 255, 255, 120);
}
#lineEdit{background:transparent; /*完全透明*/border:none;border-bottom:2px solid rgba(255,255,255,120);color: rgba(255, 255, 255, 120);
}
#pushButton{color: rgba(255, 255, 255, 120);background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:1, stop:0 rgba(170, 255, 255, 255), stop:1 rgba(255, 255, 255, 120));font: 14pt &quot;宋体&quot;;border-radius:5px;
}
#labtext{background-color: rgba(217, 217, 217, 120);border-radius:5px;font: 12pt &quot;宋体&quot;;border-radius:5px;
}</string></property><widget class="QFrame" name="frame"><property name="geometry"><rect><x>20</x><y>20</y><width>421</width><height>561</height></rect></property><property name="frameShape"><enum>QFrame::StyledPanel</enum></property><property name="frameShadow"><enum>QFrame::Raised</enum></property><widget class="QFrame" name="frame_2"><property name="geometry"><rect><x>40</x><y>30</y><width>341</width><height>501</height></rect></property><property name="frameShape"><enum>QFrame::StyledPanel</enum></property><property name="frameShadow"><enum>QFrame::Raised</enum></property><widget class="QLineEdit" name="lineEdit"><property name="geometry"><rect><x>80</x><y>150</y><width>181</width><height>41</height></rect></property><property name="font"><font><pointsize>13</pointsize></font></property><property name="placeholderText"><string> 设置时间x:x:x</string></property></widget><widget class="QPushButton" name="pushButton"><property name="geometry"><rect><x>80</x><y>220</y><width>181</width><height>41</height></rect></property><property name="font"><font><family>宋体</family><pointsize>14</pointsize><weight>50</weight><italic>false</italic><bold>false</bold></font></property><property name="text"><string>确认</string></property></widget><widget class="QLabel" name="labtext"><property name="geometry"><rect><x>40</x><y>300</y><width>261</width><height>131</height></rect></property><property name="text"><string/></property></widget></widget><widget class="QLabel" name="sys_time"><property name="geometry"><rect><x>0</x><y>0</y><width>91</width><height>21</height></rect></property><property name="text"><string/></property></widget></widget></widget><resources/><connections/>
</ui>

2.制作对话框，点击登录对话框，如果账号和密码匹配，则弹出信息对话框，给出提示登录成功，提供一个Ok按钮，用户点击OK后，关闭登录界面，跳转到其他界面；如果账号和密码不匹配，弹出错误对话框，给出信息"账号和密码不匹配，是否重新登录";并提供两个按钮Yes/No，用户点击Yes后，清除密码框中的内容，继续让用户进行登录，如果用户点击No按钮，则弹出一个问题对话框，给出信息"您是否确定要退出登录?“，并给出两个按钮Yes/No，用户点击Yes后，关闭登录界面，用户点击No后，关闭对话框，继续执行登录功能；要求:(基于属性版、静态成员函数都使用)实现对话框的弹出

代码：
widget.cpp:

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);this->setWindowTitle("Shanghai");//设置窗口标题this->setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//设置窗口图标this->setWindowFlag(Qt::FramelessWindowHint);//隐藏窗口图标this->setAttribute(Qt::WA_TranslucentBackground);//去除多余空白部分connect(ui->pushButton_2,&QPushButton::clicked,this,&Widget::pushButton_2);//基于QT5版本，手动连接信号与槽，关闭按钮功能实现connect(ui->pushButton_3,&QPushButton::clicked,this,&Widget::pushButton_3);//基于QT5版本，手动连接信号与槽，最小化按钮功能实现connect(ui->lineEdit_2,&QLineEdit::editingFinished,this,&Widget::lineEdit_2);//获取密码，并进行相应处理}Widget::~Widget()
{delete ui;
}void Widget::pushButton_2()
{this->close();//关闭窗口
}void Widget::pushButton_3()
{this->showMinimized();//最小化
}
void Widget::lineEdit_2()
{if(ui->lineEdit_3->text()=="admin"&&ui->lineEdit_2->text()=="123456"){//判断登录账号密码是否一致QMessageBox BOX;//BOX.setFixedSize(400,800);//大小设置不生效BOX.setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//自定义窗口图标BOX.setWindowTitle("提示");BOX.setText("登录成功");BOX.addButton(QMessageBox::Ok);BOX.exec();//调用对话框// QMessageBox::information(this, "登录成功","");this->close();//关闭窗口emit widet_singnal();//激活信号函数，跳转下一个窗口}else{//对话框提示登录失败//QMessageBox::information(this, "登录失败","");QMessageBox BOX;BOX.setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//自定义窗口图标BOX.setWindowTitle("账户密码不匹配");BOX.setText("是否重新登录？");BOX.addButton(QMessageBox::Yes);BOX.addButton(QMessageBox::No);int ret=BOX.exec();//调用对话框if(ret==QMessageBox::Yes){ui->lineEdit_2->clear();ui->lineEdit_3->clear();//清空行编辑器}else{QMessageBox box;box.setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//自定义窗口图标box.setWindowTitle("提示");box.setText("您是否确认退出登录？");box.addButton(QMessageBox::Yes);box.addButton(QMessageBox::No);int ret1=box.exec();//调用对话框if(ret1==QMessageBox::Yes){this->close();}else{ui->lineEdit_2->clear();ui->lineEdit_3->clear();//清空行编辑器}}}
}

dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"Dialog::Dialog(QWidget *parent) :QDialog(parent),ui(new Ui::Dialog)
{ui->setupUi(this);this->setWindowTitle("Shanghai");//设置窗口标题this->setWindowIcon(QIcon(":/Logo/shangHai.jpg"));//设置窗口图标this->setWindowFlag(Qt::FramelessWindowHint);//隐藏窗口图标QMovie *mv=new QMovie(":/Logo/R-C.gif");//设置一个动态图对象指针接收动态图ui->label->setMovie(mv);//将动图设置到lab1标签中mv->start();//让动图动起来ui->label->setScaledContents(true);//让图片自适应标签设置大小}Dialog::~Dialog()
{delete ui;
}void Dialog::dialog_slots()
{this->show();//打开另一个窗口
}

main.cpp

#include "widget.h"
#include "dialog.h"
#include <QApplication>
#include<QMessageBox>
#include<QLabel>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;//实例化一个窗口w.show();Dialog d;//实例化另一个窗口QObject::connect(&w,&Widget::widet_singnal,&d,&Dialog::dialog_slots);//两个窗口建立连接return a.exec();
}

dialog.h

#ifndef DIALOG_H
#define DIALOG_H#include <QDialog>
#include <QIcon>
#include <QMovie>
namespace Ui {
class Dialog;
}class Dialog : public QDialog
{Q_OBJECTpublic:explicit Dialog(QWidget *parent = nullptr);~Dialog();
public slots:void dialog_slots();//定义槽函数，用于两个窗口建立连接private:Ui::Dialog *ui;
};#endif // DIALOG_H

widget.h

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QMessageBox>
#include <QDebug>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();
public slots:void pushButton_2();//x按钮槽函数void pushButton_3();//最小化槽函数void lineEdit_2();//密码行功能槽函数
signals:void widet_singnal();//定义信号函数，用于连接两个窗口
private:Ui::Widget *ui;
};#endif // WIDGET_H

widget.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>Widget</class><widget class="QWidget" name="Widget"><property name="geometry"><rect><x>0</x><y>0</y><width>332</width><height>376</height></rect></property><property name="windowTitle"><string>Widget</string></property><property name="styleSheet"><string notr="true">*{/*&quot;*&quot;是通配符，匹配所有*/background-color: rgb(255, 255, 255);color: rgba(255, 255, 255, 120);
}
QFrame#frame{/*“#”也是通配符，匹配一个*/border-image: url(:/Logo/shanChuan.jpg);
}
#frame_2{background-color: rgba(179, 179, 179, 120);
}
#label{background-color: rgba(71, 71, 71, 120);border-radius:20px;
}
#label_2{background:transparent; /*完全透明*/
}
#lineEdit_2{background:transparent; /*完全透明*/border:none;border-bottom:1px solid rgba(255, 255, 255, 120);/*保留底部边框*/font: 10pt &quot;等线&quot;;color: rgba(255, 255, 255, 120);
}
#lineEdit_3{background:transparent; /*完全透明*/border:none;font: 10pt &quot;等线&quot;;border-bottom:1px solid rgba(255, 255, 255, 120);color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}
#pushButton{font: 10pt &quot;等线&quot;;background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:1, stop:0 rgba(58, 130, 205, 255), stop:1 rgba(255, 255, 255, 255));color: rgba(255, 255, 255, 120);border:none;border-radius:5px;
}
#pushButton:hover{/*鼠标移动*/font: 10pt &quot;等线&quot;;background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:1, stop:0 rgba(80, 130, 205, 255), stop:1 rgba(255, 255, 255, 255));color: rgba(255, 255, 255, 120);border:none;border-radius:5px;
}
#pushButton:pressed{/*鼠标按下特效*/font: 10pt &quot;等线&quot;;background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:1, stop:0 rgba(58, 130, 205, 255), stop:1 rgba(255, 255, 255, 255));color: rgba(255, 255, 255, 120);border:none;border-radius:5px;padding-top:5px;/*顶部抖动*/padding-left:5px;
}
#pushButton_2{background:transparent; /*完全透明*/color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}
#pushButton_2:hover{background-color: rgb(255, 0, 0);color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}
#pushButton_3{background:transparent; /*完全透明*/color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}
#pushButton_3:hover{background-color: rgb(60, 239, 255);color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}
#pushButton_4{background:transparent; /*完全透明*/color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}
#pushButton_4:hover{background-color: rgb(60, 239, 255);color: rgba(255, 255, 255, 120);font: 10pt &quot;等线&quot;;
}</string></property><widget class="QFrame" name="frame"><property name="geometry"><rect><x>50</x><y>20</y><width>221</width><height>331</height></rect></property><property name="frameShape"><enum>QFrame::StyledPanel</enum></property><property name="frameShadow"><enum>QFrame::Raised</enum></property><widget class="QFrame" name="frame_2"><property name="geometry"><rect><x>-1</x><y>-1</y><width>231</width><height>341</height></rect></property><property name="frameShape"><enum>QFrame::StyledPanel</enum></property><property name="frameShadow"><enum>QFrame::Raised</enum></property><widget class="QLabel" name="label"><property name="geometry"><rect><x>30</x><y>40</y><width>161</width><height>271</height></rect></property><property name="text"><string/></property></widget><widget class="QLabel" name="label_2"><property name="geometry"><rect><x>70</x><y>60</y><width>81</width><height>41</height></rect></property><property name="font"><font><pointsize>15</pointsize></font></property><property name="text"><string>Log In</string></property></widget><widget class="QLineEdit" name="lineEdit_2"><property name="geometry"><rect><x>50</x><y>180</y><width>121</width><height>23</height></rect></property><property name="echoMode"><enum>QLineEdit::Password</enum></property><property name="placeholderText"><string> Passwd</string></property></widget><widget class="QLineEdit" name="lineEdit_3"><property name="geometry"><rect><x>50</x><y>140</y><width>121</width><height>23</height></rect></property><property name="placeholderText"><string>Username</string></property></widget><widget class="QPushButton" name="pushButton"><property name="geometry"><rect><x>60</x><y>240</y><width>101</width><height>24</height></rect></property><property name="text"><string>Log In</string></property></widget><widget class="QPushButton" name="pushButton_2"><property name="geometry"><rect><x>200</x><y>0</y><width>24</width><height>24</height></rect></property><property name="text"><string>X</string></property></widget><widget class="QPushButton" name="pushButton_3"><property name="geometry"><rect><x>170</x><y>0</y><width>24</width><height>24</height></rect></property><property name="text"><string>-</string></property></widget><widget class="QPushButton" name="pushButton_4"><property name="geometry"><rect><x>140</x><y>0</y><width>24</width><height>24</height></rect></property><property name="text"><string>?</string></property></widget></widget></widget></widget><resources/><connections/>
</ui>

dialog.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>Dialog</class><widget class="QDialog" name="Dialog"><property name="geometry"><rect><x>0</x><y>0</y><width>390</width><height>303</height></rect></property><property name="windowTitle"><string>Dialog</string></property><widget class="QDialogButtonBox" name="buttonBox"><property name="geometry"><rect><x>230</x><y>270</y><width>161</width><height>32</height></rect></property><property name="orientation"><enum>Qt::Horizontal</enum></property><property name="standardButtons"><set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set></property></widget><widget class="QLabel" name="label"><property name="geometry"><rect><x>0</x><y>0</y><width>391</width><height>271</height></rect></property><property name="text"><string/></property></widget><widget class="QLabel" name="label_2"><property name="geometry"><rect><x>10</x><y>280</y><width>211</width><height>16</height></rect></property><property name="text"><string>想欣赏妾身的舞姿吗</string></property></widget></widget><resources/><connections><connection><sender>buttonBox</sender><signal>accepted()</signal><receiver>Dialog</receiver><slot>accept()</slot><hints><hint type="sourcelabel"><x>248</x><y>254</y></hint><hint type="destinationlabel"><x>157</x><y>274</y></hint></hints></connection><connection><sender>buttonBox</sender><signal>rejected()</signal><receiver>Dialog</receiver><slot>reject()</slot><hints><hint type="sourcelabel"><x>316</x><y>260</y></hint><hint type="destinationlabel"><x>286</x><y>274</y></hint></hints></connection></connections>
</ui>