1.制作闹钟
头文件
cpp
#include <QWidget>
#include <QTimerEvent>
#include <QTime>
#include <QtTextToSpeech/QTextToSpeech>
#include <QTextEdit>
#include <QString>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
void timerEvent(QTimerEvent *e) override; //定时器事件处理函数
private slots:
void on_startBtn_clicked();
void on_stopBtn_clicked();
private:
Ui::Widget *ui;
QTextToSpeech *speecher;
int timer_id;
};
#endif // WIDGET_H
源函数
cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
speecher = new QTextToSpeech(this);
}
Widget::~Widget()
{
delete ui;
}
//开始按钮对应的槽函数
void Widget::on_startBtn_clicked()
{
timer_id = this->startTimer(1000);
}
//停止按钮
void Widget::on_stopBtn_clicked()
{
//this->killTimer(timer_id);
speecher->stop();
ui->lineEdit->clear();
}
void Widget::timerEvent(QTimerEvent *e)
{
if(e->timerId() == timer_id)
{
QTime sys_t = QTime::currentTime(); //获取系统时间
QString t = sys_t.toString("hh:mm:ss"); //将QTime类对象转换为字符串
ui->nowtimeLeb->setText(t); //展示到ui界面
if(t == ui->lineEdit->text())
{
speecher->say(ui->textEdit->toPlainText());
}
}
}
主函数
cpp
#include "widget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}
2.保存文件
头文件
cpp
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QFileDialog>
#include <QFile>
#include <QMessageBox>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
private slots:
void on_pushButton_clicked();
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
源文件
cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_pushButton_clicked()
{
QString fileName = QFileDialog::getSaveFileName(this,
"保存文件",
"./",
"Text file(*.txt)");
if(fileName.isNull())
{
QMessageBox::information(this, "提示", "用户取消了保存文件");
return ;
}
QFile file(fileName);
if(!file.isOpen())
{
if(!file.open(QFile::ReadWrite))
{
QMessageBox::critical(this, "失败", "文件打开失败");
return;
}
}
QString msg = ui->textEdit->toPlainText();
file.write(msg.toUtf8());
file.close();
}
主函数
cpp
#include "widget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}