c++ - 如何显示存储在 QList 中的 QPointF？

Question

QList <QPointF> markers;
markers.append (QPointF (getLat (), getLon ()));


QList <QPointF> :: iterator i;
for (i = markers.begin(); i != markers.end(); ++i)
     std :: cout << *i << endl;

给我:

error: no match for 'operator<<' in 'std::cout << i.QList::iterator::operator* with T = QPointF'

Answer 1

您可以使用 qDebug() .

QList<QPointF> markers;
markers.append(getLat(), getLon());
QList<QPointF>::iterator i;
for (i = markers.begin(); i != markers.end(); ++i)
    qDebug() << *i;

记得包含QDebug:

#include <QDebug>