Qt3.1.3元对象特性测试实例对应的代码实现类person的对象年龄的增长

#include "widget.h" #include "ui_widget.h" Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); //初始化 boy = new QPerson("张三",11,90); girl= new QPerson("小红",21,100); ui->boyBox->setValue(boy->age()); ui->girlBox->setValue(girl->age()); //当调用person->setAge()，会发出ageChanged函数，执行on_ageChanged()槽函数，输出成员信息 connect(boy,&QPerson::ageChanged,this,&Widget::on_ageChanged); connect(girl,&QPerson::ageChanged,this,&Widget::on_ageChanged); } Widget::~Widget() { delete ui; } void Widget::on_clearButton_clicked() { ui->plainTextEdit->clear(); } //男孩长一岁 void Widget::on_boyButton_clicked() { boy->incAge(); ui->boyBox->setValue(boy->age()); } //女孩长一岁 void Widget::on_girlButton_clicked() { girl->incAge(); ui->girlBox->setValue(girl->age()); } void Widget::on_boyBox_valueChanged(int arg1) { boy->setAge(arg1); } void Widget::on_girlBox_valueChanged(int arg1) { girl->setAge(arg1); } //自定义的槽函数 void Widget::on_ageChanged() { //显示成员信息 QPerson *aPerson=qobject_cast<QPerson *>(sender()); QString aName=aPerson->property("name").toString(); unsigned aAge=aPerson->age(); int aSorce=aPerson->property("score").toInt(); ui->plainTextEdit->appendPlainText(aName+ QString::asprintf(",年龄=%d,成绩=%d",aAge,aSorce)); } void Widget::on_classInfoButton_clicked() { const QMetaObject *meta=boy->metaObject(); ui->plainTextEdit->clear(); ui->plainTextEdit->appendPlainText("==元对象信息=="); ui->plainTextEdit->appendPlainText( QString("类命名：%1\n").arg(meta->className())); ui->plainTextEdit->appendPlainText("property"); for(int i=meta->propertyOffset();i<meta->propertyCount();i++){ QMetaProperty prop=meta->property(i); const char *propName=prop.name(); QString propValue=boy->property(propName).toString(); ui->plainTextEdit->appendPlainText( QString("属性名称：%1，属性值：%2").arg(propName).arg(propValue)); } ui->plainTextEdit->appendPlainText(""); ui->plainTextEdit->appendPlainText("classInfo"); for(int i=meta->classInfoOffset();i<meta->classInfoCount();i++){ QMetaClassInfo classInfo=meta->classInfo(i); ui->plainTextEdit->appendPlainText( QString("Name=%1,Value=%2").arg(classInfo.name()).arg(classInfo.value())); } }