QT 设计启动界面

今天为QT设计开机界面，从网上copy的是代码先张贴如下：

#include <QApplication>
#include <QTextEdit>
#include <QSplashScreen>
#include <QtTest>
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap("img/logo.jpg"));
    splash->show();
    Qt::Alignment topRight = Qt::AlignRight | Qt::AlignTop;
    splash->showMessage(QObject::tr("Setting up the main Window..."),
                        topRight,
                        Qt::red);
    QTest::qSleep(3000);
    QTextEdit *textEdit = new QTextEdit;
    splash->showMessage(QObject::tr("Loading modules..."),
                        topRight,
                        Qt::blue);
    QTest::qSleep(3000);
    textEdit->show();
    splash->finish(textEdit);
    delete splash;
    return app.exec();
}

 当然根据QT对于QtTest的指导文档，我们要在我们工程文件中 （*.pro）添加   QT+= testlib  这么一句，要不会大大的报错。

完成了之后发现启动界面有了，但是先出现一个透明的框，没有图片，然后等待几秒，图片一闪而过。

 

main.cpp改为：

#include <QApplication>
#include <QTextEdit>
#include <QSplashScreen>
#include <QPixmap>
#include <mainwindow.h>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap("img/logo.jpg"));
    splash->show();
    Qt::Alignment topRight = Qt::AlignRight | Qt::AlignTop;
    QTextEdit *textEdit = new QTextEdit;
    splash->showMessage(QObject::tr("Loading modules..."),
                        topRight,
                        Qt::blue);
    MainWindow window;
    window.show();
    splash->finish(textEdit);
    delete splash;
    return app.exec();
}

 mainwindow.cpp改为：

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QTextEdit>
#include <QDateTime>
#include <QCoreApplication>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    QTextEdit *edit=new QTextEdit;
    edit->setText("Splash Example!");
    setCentralWidget(edit);
    resize(600,450);

    QDateTime n=QDateTime::currentDateTime();
    QDateTime now;
    do{
        now=QDateTime::currentDateTime();
        QCoreApplication::processEvents();
    } while (n.secsTo(now)<=5);//5为需要延时的秒数
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

 

成功运行

这篇文章跟我转载那篇是一样的