QT开发的小程序：输入数字音乐简谱，直接发出乐曲声音

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); musicPlayer = new QMediaPlayer(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_clicked() { musicPlayer->stop(); //停止播放上一首 /*1.获取绝对路径absDir*/ QString runPath = QCoreApplication::applicationDirPath();//获取当前exe所在路径 QString absDir = runPath + "/Oh.mp3"; qDebug()<<runPath<<" "<<absDir; absDir.replace(QString("/"), QString("\\"));/*替换为windown的目录格式*/ ui->textBrowser->setText(absDir); /*2.创建QMediaPlayer对象指针，通过指针设置文件路径、音量、播放*/ // musicPlayer->setMedia(QUrl::fromLocalFile(absDir)); // musicPlayer->setVolume(ui->lineEdit->text().toInt()); // musicPlayer->play(); boss(ui->textEdit->toPlainText()); } void MainWindow::on_pushButton_2_clicked() { delay(1000); musicPlayer->stop(); } void MainWindow::delay(unsigned int msec) { QTime _Timer = QTime::currentTime().addMSecs(msec); while( QTime::currentTime() < _Timer ) QCoreApplication::processEvents(QEventLoop::AllEvents, 100); } void MainWindow::boss(QString yuepu) { QString runPath = QCoreApplication::applicationDirPath();//获取当前exe所在路径 QString absDir = runPath;// + "/Oh.mp3"; int length=yuepu.length(); for(int i=0;i<length;i++) { if(yuepu.at(i).toLatin1()>=48 && yuepu.at(i).toLatin1()<=57) { absDir=runPath+"/mp3/"+yuepu.at(i)+".mp3"; qDebug()<<absDir; ui->textBrowser->setText(absDir); musicPlayer->setMedia(QUrl::fromLocalFile(absDir)); musicPlayer->setVolume(ui->lineEdit->text().toInt()); musicPlayer->play(); delay(500); } else if(yuepu.at(i)==' ') { delay(700); } } }