如何传递参数给evaluateJavaScript函数

for (int i = 0; i < centerPointsList.size (); i++)
    {
        QVariant         holdInformation = map->page ()->mainFrame ()->evaluateJavaScript (QString ("constructFileName (%1).arg (centerPointsList[0].toFloat())"));
        QList <QVariant> allListObj      = holdInformation.toList ();
        QList <QVariant> fileNamesList   = allListObj[0].toList ();
        std :: cout << fileNamesList[0].toFloat() << "================= n";
    }

结果是:

"SyntaxError: Parse error on line:1 Source:undefined"
段错误

我猜错误是在我将列表项传递给函数evaluateJavaScript的方式。

我试过了:

for (int i = 0; i < centerPointsList.size (); i++)
 {
   QVariant holdInformation = map->page ()->mainFrame ()->evaluateJavaScript (QString ("constructFileName (%1)").arg (centerPointsList [0].toFloat ()));

导致:

"TypeError: Result of expression 'centerPointFileName. "Split ' [undefined]不是一个函数。来源:file:///…/index.html"

函数constructFileName(在Javascript中)如下:

function constructFileName (centerPointFileName)
 {
   var removeSpaces = centerPointFileName.split (" ");
   var fileNameWithoutSpaces = "", i;
   for (i = 0; i < removeSpaces.length; i++)
       fileNameWithoutSpaces = fileNameWithoutSpaces + removeSpaces [i];