QMap迭代器

QMap<int, QString> intToStr;
intToStr[] = "test"
for (auto iter = intToStr.begin(); iter != intToStr.end(); ++iter)
    {
        //int aa = *iter;
        QString two = iter.value();
        QString test = *iter;//对迭代器解引用是返回value值，按我的理解迭代器应该指向的是那一对数据啊
    }