| zhengtianzuo | 2017-10-10 16:03 |
zhengtianzuo系列-Qt调用插件首先创建一个Qt的一般的动态库然后创建一个插件接口文件, 如下: ``` #pragma once #include <QtPlugin> class CQtMyPluginInterface { public: virtual ~CQtMyPluginInterface() {} virtual QString getString() = 0; }; Q_DECLARE_INTERFACE(CQtMyPluginInterface, "cn.camelsoft.CQtMyPluginInterface/1.0") ``` 1. ` #include <QtPlugin>` //引用Qt插件系统头文件 2. `Q_DECLARE_INTERFACE(CQtMyPluginInterface, "cn.camelsoft.CQtMyPluginInterface/1.0")` //申明接口 然后改造库类的头文件, 如下: ``` #pragma once #include <QObject> #include "QtMyPluginInterface.h" class CQtMyPlugin : public QObject, public CQtMyPluginInterface { Q_OBJECT Q_PLUGIN_METADATA ( IID "cn.camelsoft.CQtMyPluginInterface/1.0") Q_INTERFACES(CQtMyPluginInterface) public: virtual QString getString(); }; ``` 1. `Q_PLUGIN_METADATA ( IID "cn.camelsoft.CQtMyPluginInterface/1.0")` //注册插件ID 2. `Q_INTERFACES(CQtMyPluginInterface)` //申明插件接口 这样一个Qt插件框架下开发的插件就做好了. 接下来是调用 ``` QPluginLoader loader("QtMyPlugin.dll"); if (!loader.load()) { return; } CQtMyPluginInterface *plugin = qobject_cast<CQtMyPluginInterface *>(loader.instance()); if (plugin) { QMessageBox::about(NULL, QStringLiteral("显示插件信息"), plugin->getString()); } ```  需要完整代码请访问 QtWidgetsExamples |
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