信号 QWebPage::loadFinished(bool) 返回两次? [英] Signal QWebPage::loadFinished(bool) returns twice?

问题描述

我遇到了 QWebPage::loadFinished (bool) 信号的问题，它回调了两次，这正常吗?(根本没有链接，例如 HTTP 状态 302)

I got a problem with QWebPage::loadFinished (bool) signal , it calls back twice , is that normal ? ( there's no link following at all , e.g HTTP status 302 )

考虑下面的代码，整个事情可能会导致问题，正在尝试加载该插槽内的另一个链接，这会是一个问题吗?

Consider the following code , the whole thing may cause problem , is trying to load another link within that slot , will this be a problem ?

如果我执行 qDebug() < 每次在 loadFinished(bool) 槽中，我都能看到 3 次，正常吗，url XXX 1 次，url 2 次YYY ，最后两个链接完全一样.

If i do a qDebug() << thisUrl; each time in loadFinished(bool) slot , i could see it for 3 times , is that normal , one for url XXX , and two for url YYY , and the last two links are exactly the same.

class Dummy
{
    public:
        Dummy() 
        { 
            page = new QWebPage(this);  
            connect (page , SIGNAL(loadFinished(bool)) , SLOT(loadFinished(bool)));
            page->mainFrame()->load ("XXX");
        }

    private:
        QWebPage *page;

    private slots:
        void loadFinished (bool ok)
        {
            if ( ! ok ) return;

            const QString & thisUrl = page->mainFrame()->url().toString();

            if ( thisUrl matches XXX )
            {
                // parse reply message of url XXX
                page->mainFrame()->load ("YYY");
                return;
            }

            if ( thisUrl matches YYY )
            {
                // parse reply message of url YYY
                return;
            }
        }
};

推荐答案

我在 qt 4.7.4(使用 phantomjs)中也看到了这一点.我使用了框架的 loadFinished 而不是页面的，它没有发送两次.

im seeing this too with qt 4.7.4 (with phantomjs). i used the frame's loadFinished instead of the page's and it isn't sent twice.

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