QT学习第一天-------

点击鼠标，使鼠标所上面的值变成文本框里面的值

void myWidget::on_pushButton_clicked(){   qDebug()<<"hello world";   QString strData=ui->textBrowser->toPlainText();   ui->pushButton->setText(strData);}

清空行文本编辑里面的内容

void myWidget::on_pushButton_clicked(){    ui->lineEdit->clear();}

做一个时间显示

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QtCore>#include <QTime>#include <QTimer>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    QTimer *timer = new QTimer(this);    定义一个timer对象    connect(timer,SIGNAL(timeout()),this,SLOT(timerUpDate()));    每隔1秒发送一个timeout信号    timer->start(1000);}MainWindow::~MainWindow(){    delete ui;}void MainWindow::timerUpDate(){    QDateTime time = QDateTime::currentDateTime();    QString str = time.toString("yyyy-MM-dd hh:mm:ss dddd");    //QString str = time.toString("hh:mm:ss dddd");    //QLabel *label;     ui->label->setText(str);     //ui->setupUi(&str);}