qt webview与js交互(网页里的弹出窗口不响应js接口)

步骤：

QWebView *pWebView = new QWebView();

pWebView->load(QUrl(yourHtml));

//yourHtml 为网址或本地资源地址，如果放在qt资源里则html地址前要加qrc:前缀。

pWebView->page()->settings()->setAttribute(QWebSettings::JavascriptEnabled,true);

//QWebSettings::JavascriptEnabled   Enables or disables the running of JavaScript programs. This is enabled by default

pWebView->page()->mainFrame()->addToJavaScriptWindowObject("bound",this);

//bound在html文件中设定。

connect(pWebView->page()->mainFrame(),SIGNAL(javaScriptWindowObjectCleared()),this,SLOT(slot_AddObjectToJs()));

//If you intend to add QObjects to a QWebFrame using addToJavaScriptWindowObject(), you should add them in a slot connected to this signal. This ensures that your objects remain accessible when loading new URLs.

...

void slot_AddObjectToJs()

{

 pWebView->page()->mainFrame()->addToJavaScriptWindowObject("bound",this);

}

//------------------------------------------------------------------------------------------------------------------------------------------------

只有一个frame的网页用以上步骤即可，但是有的网页里会弹出新的网页（比如网页里的弹窗），此时此弹窗里的js接口函数就访问不到了。这是因为page()中添加新frame的后没有绑定（addToJavaScriptWindowObject("bound",this)）。还需添加

connect(pWebView->page(),SIGNAL(frameCreated(QWebFrame*)),this, SLOT(slot_frameCreated(QWebFrame*)));

//frameCreated(QWebFrame*)    This signal is emitted whenever the page creates a new frame.

void slot_frameCreated(QWebFrame* pWebFrame)

{

 pWebFrame->addToJavaScriptWindowObject("bound", this);

}

//这样不管加载的html页面刷新还是有新frame打开都能正常调用js借口函数。

//-------------------------------------------------------------------------------------------------------------------------------------------------

webview --> webpage --> webFrame 关系

addToJavaScriptWindowObject("bound",this);

/*

Make object available under name from within the frame's JavaScript context. The object will be inserted as a child of the frame's window object.

Qt properties will be exposed as JavaScript properties and slots as JavaScript methods. The interaction between C++ and JavaScript is explained in the documentation of the Qt WebKit bridge.

If you want to ensure that your QObjects remain accessible after loading a new URL, you should add them in a slot connected to the javaScriptWindowObjectCleared() signal.

*/

参考：qthelp  <The Qt WebKit Bridge>