Qt自定义插件的构建和使用

#include "testCommPlugin.h" #include <QDir> #include <QApplication> #include <QMessageBox> #include <QPluginLoader> #include <QVBoxLayout> #include <QDebug> #include <QPushButton> testCommPlugin::testCommPlugin(QWidget *parent) : QMainWindow(parent) { _editInput1 = new QLineEdit; _editInput2 = new QLineEdit; _editInput1->setText(QString::number(33)); _editInput2->setText(QString::number(22)); QHBoxLayout* layoutIn = new QHBoxLayout; layoutIn->addWidget(_editInput1); layoutIn->addWidget(_editInput2); _editOutput = new QLineEdit; _comboBoxOper = new QComboBox; QPushButton* buttonCali = new QPushButton(QStringLiteral("计算")); connect(buttonCali, &QPushButton::clicked, this, [&]() { on_pushButton_clicked(); }); QHBoxLayout* layoutOut = new QHBoxLayout; layoutOut->addWidget(_editOutput); layoutOut->addWidget(_comboBoxOper); layoutOut->addWidget(buttonCali); QVBoxLayout* layoutMain = new QVBoxLayout; layoutMain->addLayout(layoutIn); layoutMain->addLayout(layoutOut); QWidget* pCenterWidget = new QWidget; setCentralWidget(pCenterWidget); pCenterWidget->setLayout(layoutMain); if (!loadPlugin()) return; } testCommPlugin::~testCommPlugin() {} bool testCommPlugin::loadPlugin() { QDir pluginsDir(qApp->applicationDirPath()); //pluginsDir："../build-xxx-debug/debug" #if defined(Q_OS_WIN) //if (pluginsDir.dirName().toLower() == "debug" || pluginsDir.dirName().toLower() == "release") // pluginsDir.cdUp(); //pluginsDir："../build-xxx-debug" //pluginsDir.cdUp(); //pluginsDir："../" #elif defined(Q_OS_MAC) if (pluginsDir.dirName() == "MacOS") { pluginsDir.cdUp(); pluginsDir.cdUp(); pluginsDir.cdUp(); } #endif //pluginsDir.cd("plugins"); foreach(QString fileName, pluginsDir.entryList(QDir::Files)) { QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName)); QObject* plugin = pluginLoader.instance(); qDebug() << __FUNCTION__ << pluginLoader.errorString(); if (!plugin) continue; DeclareInterface* pluginOper = qobject_cast<DeclareInterface*>(plugin); if (!pluginOper) continue; _comboBoxOper->addItem(pluginOper->name()); mapPluginOper[pluginOper->name()] = pluginOper; } //vecPluginOper.push_back(qobject_cast<DeclareInterface*>(QPluginLoader(pluginsDir.absoluteFilePath("PluginAdd.dll")).instance())); //vecPluginOper.push_back(qobject_cast<DeclareInterface*>(QPluginLoader(pluginsDir.absoluteFilePath("PluginAdd.dll")).instance())); //vecPluginOper.push_back(qobject_cast<DeclareInterface*>(QPluginLoader(pluginsDir.absoluteFilePath("PluginSub.dll")).instance())); return false; } void testCommPlugin::on_pushButton_clicked() { QString pluginName = _comboBoxOper->currentText(); DeclareInterface* pluginOper = mapPluginOper[pluginName]; int a = _editInput1->text().toInt(); int b = _editInput2->text().toInt(); int r = -1; if (pluginOper) { r = pluginOper->oper(a, b); } _editOutput->setText(QString::number(r)); DeclareInterface* pluginOper1 = mapPluginOper[pluginName]; DeclareInterface* pluginOper2 = mapPluginOper[pluginName]; int r1 = pluginOper1->oper(a, b); int r2 = pluginOper2->oper(a, b); return; }