所谓的Qt javascript扩展指的是将QObject对象抛出给webkit和javascript，这样前端就可以通过js去调用QObject对象的方法，这里的方法是指QObject的public slots，另外QObject的属性在javascript中也是可用的，QObject无法由QtWebkit显式地删除。
main.cpp- #include <qapplication.h>
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#include <qwebview.h>
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#include "testobject.h"
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int main( int argc, char **argv )
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{
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QApplication app( argc, argv );
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QWebView *view = new QWebView();
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MyClass *myclass = new MyClass( view );
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myclass->setWebView( view );
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view->setUrl( QUrl( "test.html" ) );
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view->show();
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return app.exec();
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}
- TEMPLATE = app
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TARGET =
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DEPENDPATH += .
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INCLUDEPATH += .
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QT += webkit
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# Input
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HEADERS += testobject.h
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SOURCES += main.cpp testobject.cpp
- #ifndef TESTOBJECT_H
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#define TESTOBJECT_H
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#include <qobject.h>
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class QWebView;
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class QWebFrame;
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class MyClass : public QObject
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{
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Q_OBJECT
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public:
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MyClass( QObject *parent );
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void setWebView( QWebView *view );
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public slots:
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void print( const QString ¶m );
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private slots:
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void attachObject();
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private:
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QWebFrame *frame;
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};
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#endif // TESTOBJECT_H
- #include <qdebug.h>
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#include <qwebview.h>
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#include <qwebframe.h>
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#include "testobject.h"
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MyClass::MyClass( QObject *parent )
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: QObject( parent )
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{
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}
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void MyClass::setWebView( QWebView *view )
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{
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QWebPage *page = view->page();
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frame = page->mainFrame();
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attachObject();
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connect( frame, SIGNAL(javaScriptWindowObjectCleared()), this, SLOT(attachObject()) ); //当网页被载入或者刷新时，将暴露给webkit的QObject和JavaScript进行连接
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}
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void MyApi::attachObject()
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{
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frame->addToJavaScriptWindowObject( QString("MyApi"), this );//前提是使能javascript，即将JavascriptEnabled属性值设置为true;
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}
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void MyClass::print( const QString ¶m )
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{
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//这是最终被javascript脚本调用的函数
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qDebug() << "Print paramter from js script:" << param;
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}
- <html>
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<body>
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Test Page for Qt Javascript Extension!
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<script>
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MyClass.print( 'Test Page for Qt Javascript Extension!' );
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</script>
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</body>
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</html>
将以上几个文件放在一个目录下，编译测试
qmake
make
./test
