2023/09/19 qt day3

头文件

#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QDebug>
#include <QTime>
#include <QTimer>
#include <QPushButton>
#include <QTextEdit>
#include <QLineEdit>
#include <QLabel>
#include <QtTextToSpeech/QTextToSpeech>
#include <QString>
#include <QObject>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();//定时器事件处理函数void timerEvent(QTimerEvent *e) override;
private slots:void on_btn1_clicked();void on_btn2_clicked();private:Ui::Widget *ui;int timer_id1;       //定时器的id号//定义一个播报员QTextToSpeech *speaker;};
#endif // WIDGET_H

功能函数文件

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);//给播报员实例化空间speaker = new QTextToSpeech(this);
}Widget::~Widget()
{delete ui;
}
//启动启动定时器按钮对应的槽函数
void Widget::timerEvent(QTimerEvent *e)
{//id1if(e->timerId() == timer_id1){//获取系统时间存放在sys_t中QTime sys_t1 = QTime::currentTime();//将QTime类转化成Qstring类QString t1 = sys_t1.toString("hh:mm:ss");//展示到ui界面ui->lab->setText(t1);//判断行文本编辑器，设置一个时间，如果时间到了就播报古诗if(ui->L_edit1->text() == t1 ){speaker->say(ui->T_edit1->toPlainText());}}
}//启动系统时间的按钮
void Widget::on_btn1_clicked()
{timer_id1 = this->startTimer(1000);}
//停止系统时间的按钮
void Widget::on_btn2_clicked()
{this->killTimer(timer_id1);  //关闭给定定时器的id号speaker->stop();
}

效果图

保存按钮对应的槽函数

void Widget::on_keepbtn_clicked()
{QString filename = QFileDialog::getSaveFileName(this,"另存为","./",
"All(*.*);;Images(*.png *.xpm *.jpg);;Text files(*.txt);;XML files(*.xml)");if(filename.isNull()){QMessageBox::information(this,"提示","用户取消了文件保存");return ;}//实例化一个文件对象QFile file(filename);if(!file.open(QFile::ReadWrite)){QMessageBox::critical(this,"失败","文件打开失败");return ; //文件打开失败}//获取需要保存的内容QString content =ui->textEdit->toPlainText();QByteArray msg1 = content.toUtf8();file.write(msg1);file.close();}