QML C++插件dll引用

插件的创建非常简单，但是它可以复用，并且为不同的应用程序扩展类型。使用创建的插件是非常灵活的
解决方案。关于插件一个很好的例子见QmlBook-In-Chinese 中最后一章介绍的例子。

本文主要备忘生成插件dll，怎么引用。

1.创建插件 ，Library->Qt Quick 2 Extension Plugin

 

#ifndef MYITEM_H#define MYITEM_H#include <QQuickItem>class MyItem : public QQuickItem{    Q_OBJECT    Q_DISABLE_COPY(MyItem)public:    MyItem(QQuickItem *parent = 0);    ~MyItem();         Q_INVOKABLE void read();};#endif // MYITEM_H

#include "myitem.h"#include <QDebug>MyItem::MyItem(QQuickItem *parent):    QQuickItem(parent){    // By default, QQuickItem does not draw anything. If you subclass    // QQuickItem to create a visual item, you will need to uncomment the    // following line and re-implement updatePaintNode()    // setFlag(ItemHasContents, true);}MyItem::~MyItem(){}void MyItem::read(){    qWarning() << "qml cpp plugin ";}

#pragma once#include <QQmlExtensionPlugin>class QMLCPPPluginPlugin : public QQmlExtensionPlugin{    Q_OBJECT    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QQmlExtensionInterface")public:    void registerTypes(const char *uri);};

#include "qmlcppplugin_plugin.h"#include "myitem.h"#include <qqml.h>void QMLCPPPluginPlugin::registerTypes(const char *uri){    // @uri com.mycompany.qmlcomponents    qmlRegisterType<MyItem>(uri, 1, 0, "MyItem");}

qmldir 文件

 module MyPlugin

 plugin QMLCPPPlugin

编译，生成release和debug   QMLCPPPlugin.dll 和 QMLCPPPlugind.dll

 

2.应用

 Application->Qt Quick Application

 

在应用程序新建文件夹DLL(DLL文件夹和QMLCPPPluginApp.pro同级目录),在DLL新建文件夹MyPlugin(此MyPlugin是qmldir文件中module).

注:如果qmldir中的module制定为 如 com.yourcompany.qmlxxxx 之类的， 那文件夹需要按 . 建立子文件夹,如 com/yourcompany/qmlxxx

把QMLCPPPlugin.dll ,QMLCPPPlugind.dll和qmldir复制到MyPlugin文件夹内。（D:\Test1\QMLCPPPluginApp\QMLCPPPluginApp\DLL\MyPlugin）

 

指定插件DLL的路径

 engine.addImportPath("D:/Test1/QMLCPPPluginApp/QMLCPPPluginApp/DLL/");

如果不指定，在Qt安装文件D:\ProgramFiles\Qt\Qt580\5.8\mingw53_32\qml目录新建文件夹MyPlugin,把QMLCPPPlugin.dll ,QMLCPPPlugind.dll和qmldir复制到MyPlugin文件夹内。

 

#include <QGuiApplication>#include <QQmlApplicationEngine>int main(int argc, char *argv[]){    QGuiApplication app(argc, argv);    QQmlApplicationEngine engine;    engine.addImportPath("D:/Test1/QMLCPPPluginApp/QMLCPPPluginApp/DLL/");    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));    return app.exec();}

import QtQuick 2.6import QtQuick.Window 2.2import MyPlugin 1.0Window {    visible: true    width: 640    height: 480    title: qsTr("Hello World")    MainForm {        anchors.fill: parent        mouseArea.onClicked: {            cppPlugin.read()            console.log(qsTr('Clicked on background. Text: "' + textEdit.text + '"'))        }    }    MyItem{        id:cppPlugin    }}

本文转载自:https://www.cnblogs.com/ike_li/p/6743599.html