6.18 作业

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qt中用定时器实现闹钟

头文件

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include<QTime>//时间类
#include<QTimer>//时间事件类
#include<QtTextToSpeech/QTextToSpeech>//文本转语音类QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();void timerEvent(QTimerEvent *e);//重写定时器事件函数声明private slots:void on_pushButton_clicked();void on_pushButton_2_clicked();private:Ui::Widget *ui;int id;//定时器idint id2;QTextToSpeech *speech;//实例化一个语音播报员
};
#endif // WIDGET_H

源文件

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget),speech(new QTextToSpeech(this))//实例化申请空间
{ui->setupUi(this);this->setWindowFlag(Qt::FramelessWindowHint);//去掉头部分this->setAttribute(Qt::WA_TranslucentBackground);//去掉空白部分id = startTimer(1000);//启动计时器
}Widget::~Widget()
{delete ui;
}
void Widget::timerEvent(QTimerEvent *e)
{//显示系统时间QTime sys_time = QTime::currentTime();//获取当前系统时间QString s = sys_time.toString("hh:mm:ss");//将系统时间转换成字符串if(e->timerId() == id){ui->label->setText(s);//将系统时间设置到ui界面上的labelui->label->setAlignment(Qt::AlignCenter);//居中显示}if(s == ui->lineEdit->text()){killTimer(id2);for(int i=0;i<5;i++){speech->say(ui->label_3->text());}}
}//x按钮槽函数
void Widget::on_pushButton_clicked()
{this->close();//关闭窗口
}
//启动槽函数
void Widget::on_pushButton_2_clicked()
{id2 = startTimer(1000);//启动定时器}

运行

qt实现登录 

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);//    去掉头部this->setWindowFlag(Qt::FramelessWindowHint);//    去掉空白部分this->setAttribute(Qt::WA_TranslucentBackground);ui->lineEdit_2->setClearButtonEnabled(true);};Widget::~Widget()
{delete ui;
}void Widget::on_pushButton_clicked()
{QMessageBox box;//设置文本框的大小if(ui->lineEdit->text() == "admin") {if( ui->lineEdit_2->text() == "123456" ){int ret = QMessageBox::information(this,"提示","登录成功",QMessageBox::Ok| QMessageBox::No);if(ret == QMessageBox::Ok){//登录界面关闭跳转下一个界面emit my_jump_login();}  }else{QMessageBox::information(this,"提示","登录失败",QMessageBox::Ok);}}else{QMessageBox::information(this,"提示","登录失败",QMessageBox::Ok);}
}void Widget::on_pushButton_2_clicked()
{this->close();
}void Widget::on_pushButton_3_clicked()
{this->showMinimized();
}

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