QRegExpValidator编译错误

[gohome520]

编译的时候提示错误，但实在不知道该怎么才能好使，请指教。
no matching function for call to 'QRegExpValidator::QRegExpValidator(QRegExp *&, IPLineEdit*const)'
candidates are:
QRegExpValidator::QRegExpValidator(const QRegExp&, QObject*)

class IPLineEdit : public QWidget
{
    Q_OBJECT
public:
    IPLineEdit(QWidget *parent = 0);

private:
    QLineEdit *ipLineEdit;
    QLabel *ipLabel;
    QHBoxLayout *layout;
    QRegExp *ipRegExp;
    QRegExpValidator *ipRegExpValidator;
};

IPLineEdit::IPLineEdit(QWidget *parent)
{
    ipLabel = new QLabel(tr("IP Address:"));
    ipLineEdit = new QLineEdit;
    ipLabel->setBuddy(ipLineEdit);

    ipRegExp = new QRegExp("((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-4]|[01]?\\d\\d?)");
    ipRegExpValidator = new QRegExpValidator(ipRegExp, this);
    ipLineEdit->setValidator(ipRegExpValidator);
    ipLineEdit->setInputMask("000.000.000.000;");

    layout = new QHBoxLayout;
    layout->addWidget(ipLabel);
    layout->addWidget(ipLineEdit);

    setLayout(layout);
}

[gohome520]

终于弄清楚了，没看清错误提示，一直以为是第2个参数错误，实际是第1个参数有问题。
给大家看笑话了。。。

ipRegExp = new QRegExp("((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-4]|[01]?\\d\\d?)");
ipRegExpValidator = new QRegExpValidator(ipRegExp, this);