【Qt之QSplashScreen】开场动画使用:进度条加载及设置鼠标指针不转圈

#include "customsplashscreen.h" #include <QPixmap> #include <QThread> #include <QDateTime> #include <QApplication> #include <QProgressBar> #include <QVBoxLayout> #include <QHBoxLayout> #include <QLabel> #include <QDebug> #define DELAYTIME 1000 // DELAYTIME为需要延时的毫秒数 #define SHOWNO 3 // 显示加载次数 CustomSplashScreen::CustomSplashScreen(QWidget *parent) : QSplashScreen(parent) { QString strScreen = "./ss.jpg"; QFont font = this->font(); font.setPixelSize(23); setFont(font); QPixmap loadingPix(strScreen); setPixmap(loadingPix.scaled(500, 300)); m_pProgressBar = new QProgressBar(this); m_pProgressBar->setRange(0 ,100); m_pProgressBar->setValue(0); m_pProgressBar->setStyleSheet("QProgressBar{color:#ff0000;}"); QLabel* pLabel = new QLabel("加载中..."); pLabel->setStyleSheet("QLabel {color:#ff0000; font-weight: bold; font-style: italic; font-size: 23px;}"); QHBoxLayout* pHB = new QHBoxLayout(); pHB->addStretch(); pHB->addWidget(pLabel); pHB->addStretch(); QVBoxLayout* pVB = new QVBoxLayout(this); pVB->addStretch(); pVB->addLayout(pHB); pVB->addWidget(m_pProgressBar); this->setLayout(pVB); } void CustomSplashScreen::init() { // 先设置显示，再设置显示信息，如果设置完显示信息再设置显示，会看不到 show(); // 设置鼠标指针不转圈 QApplication::setOverrideCursor(Qt::ArrowCursor); // 显示信息，及文本对齐方式：右上， 字体:red showMessage("程序正在加载...", Qt::AlignTop|Qt::AlignRight, Qt::red); QDateTime time = QDateTime::currentDateTime(); QDateTime currentTime = QDateTime::currentDateTime(); // 记录当前时间 m_pProgressBar->setValue(0); int nInter = time.msecsTo(currentTime); while(nInter <= DELAYTIME) { currentTime = QDateTime::currentDateTime(); m_pProgressBar->setValue(0.025*nInter); nInter = time.msecsTo(currentTime); } for(int i = 0; i < SHOWNO; ++i) { showMessage(QString("请稍等%1...").arg(SHOWNO-i), Qt::AlignTop|Qt::AlignRight, Qt::red); time = currentTime; nInter = time.msecsTo(currentTime); while(nInter <= DELAYTIME) { currentTime = QDateTime::currentDateTime(); m_pProgressBar->setValue(25*(i+1) + 0.025*nInter); nInter = time.msecsTo(currentTime); } } m_pProgressBar->setValue(100); }