QT5 Widget无边框标题栏和自定义程序启动画面

#include "mainwidget.h" #include <QApplication> #include <QSharedMemory> #include <QSplashScreen> #include <QDateTime> int main(int argc, char *argv[]) { QApplication a(argc, argv); QSharedMemory shared_memory; shared_memory.setKey(QString("MainInterface")); if (shared_memory.attach()) { return 0; } if (shared_memory.create(1)) //任何时候只启动一个相同的程序 { MainWidget w; //程序启动logo QSplashScreen *splash = new QSplashScreen; splash->setPixmap(QPixmap(":/ad/loading")); //splash->setWindowOpacity(0.9); splash->show(); QDateTime n2=QDateTime::currentDateTime(); QDateTime now; Qt::Alignment topRight = Qt::AlignHCenter | Qt::AlignBottom; splash->showMessage(QObject::tr("Starting the main interface..."),topRight, Qt::black); do{ now=QDateTime::currentDateTime(); }while (n2.secsTo(now)<=2);//2为需要延时的秒数 splash->showMessage(QObject::tr("Loading database module..."),topRight, Qt::black); do{ now=QDateTime::currentDateTime(); }while (n2.secsTo(now)<=3);//3为需要延时的秒数 splash->showMessage(QObject::tr("loading..."),topRight, Qt::black); do{ now=QDateTime::currentDateTime(); }while (n2.secsTo(now)<=4);//4为需要延时的秒数 splash->finish(&w); w.show(); return a.exec(); } }