随笔分类 - Qt学习笔记
摘要：今天调试以前写的opencv的程序发现每次一点运行就报错误StartingD:\Qt\QProjects\build-HelloWorld-lian-Debug\debug\HelloWorld.exe...程序异常结束。D:\Qt\QProjects\build-HelloWorld-lian-D...
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摘要：void SerialWidget::on_btnMysql_clicked() { qDebug()<<QSqlDatabase::drivers()<<endl; /*列出qt可用的数据库*/ //链接mysql数据库 QSqlDatabase db( QSqlDatabase::addDatabase( "QMYSQL" ) ); db.setHostNam...
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摘要：需要在portname前添加\\\\.\\这样就可以了！！例如QString portname;portname.append("\\\\.\\").append(ui->SerialCom->currentText());SerialCom->setPortName(portname);
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摘要：添加头文件#include if(ui->lineEditXStart->text().isEmpty()) //判断lineedit输入内容是否为空 { QMessageBox::information(this,tr("Error"),QStringLiteral("请输入相...
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摘要：void MainWindow::String2Hex(QString str, QByteArray &senddata){ int hexdata,lowhexdata; int hexdatalen = 0; int len = str.length(); sendda...
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摘要：void MainWindow::on_pushButtonSnap_clicked(){ char image_name[13]; sprintf(image_name, "%s%d%s", "C:/image", ++PicNum, ".jpg"); imwrite(image...
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摘要：用记事本打开源代码，然后点另存为，utf-8，编码覆盖QStringLiteral("打开相机")
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摘要：void MainWindow::on_pushButtonShowMarker_clicked(){ QString lat = "104.701681"; QString lon = "31.535617"; //ui->webViewMap->page()->mainFr...
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摘要：.pro中添加LIBS += -L”C:\Qt\Qt5.3.2\5.3\msvc2013_opengl\lib” -lqwtINCLUDEPATH += "C:\Qt\Qt5.3.2\5.3\msvc2013_opengl\include\qwt"include (C:\Qt\qwt-6.1.0\q...
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摘要：在.pro文件中添加INCLUDEPATH += C:\opencv\build\include\ #头文件路径 C:\opencv\build\include\opencv\ C:\opencv\build\include\op...
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