嵌入式学习-qt-Day4

一、思维导图

二、作业

1.设计一个界面：显示系统时间；可以设置闹钟，在设置的时间到达后，显示五次字符串，并且语音播报。

Wight.h

#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QTimerEvent>
#include <QTime>
#include <QDebug>
#include <QTextToSpeech>QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();void timerEvent(QTimerEvent *event) override;int t1;//定时器1int t2;//定时器2
private slots:void on_pushButton_clicked();
private:Ui::Widget *ui;QTextToSpeech *speech;//语音播报者
};
#endif // WIDGET_H

Wight.cpp

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);t1 = startTimer(1000);//启动定时器t1speech = new QTextToSpeech(this); //实例化语音播报者
}//定时器函数
void Widget::timerEvent(QTimerEvent *e)
{//系统时间if (e->timerId() == t1){QTime sys_time = QTime::currentTime();QString s = sys_time.toString("hh:mm:ss");ui->sys_time->setText(s);}//闹钟if ((e->timerId() == t2)){for(int i = 0;i < 5; i++){ui->label->setText("好好学习天天向上");speech->say(ui->label->text());}killTimer(t2);//关闭定时器2}
}Widget::~Widget()
{delete ui;
}
void Widget::on_pushButton_clicked()
{QTime sys_time = QTime::currentTime();QTime alarm_time = ui->timeEdit->time();int current_s = sys_time.hour()*3600 + sys_time.minute()*60 + sys_time.second();int alarm_s = alarm_time.hour()*3600 + alarm_time.minute()*60 + alarm_time.second();t2 = startTimer((alarm_s - current_s)*1000);//启动定时器2ui->label->setText("设置成功!");
}

运行结果