#include "ExPerson.h" //加一个参后的构造函数 ExPerson::ExPerson(QString name, QObject *parent) : QObject(parent) { m_name = name; } int ExPerson::getAge() { return m_age; } void ExPerson::setAge(int value) { m_age = value; emit ageChanged(m_age); //发射信号 } void ExPerson::incAge() { m_age++; emit ageChanged(m_age); //发射信号 }