C++ 公开QList<；QObject*>；QML的层次结构

我目前的情况是，我有一个带有MyClass的QList，还包括一个列表QList

要显示此列表层次结构，我希望在ListView中提供一个中继器

我用QStringList试过了，效果很好（见下面未注释的行）。当我尝试使用QList执行此操作时，我无法访问MySubClass的name属性。而是显示MyClass的name属性

错误输出：

Object 1
Object 1
Object 1
Object 2

正确的输出应为：

Object 1
SubObject 1
SubObject 2
Object 2

编辑：2014年12月8日 我发现了为什么子列表不起作用。我只需要替换子ListView委托中的一行（name->modelData.name）

这是我的密码：

main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QList>
#include <QDebug>

#include "myclass.h"

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    /* create simple stringlist */
    QStringList dataList;
    dataList << "Data 1"
         << "Data 2"
         << "Data 3";

    /* create more complex QObject List */
    MySubClass *mySubObject = NULL;
    QList<QObject *> mySubList;

    mySubObject = new MySubClass;
    mySubObject->setName("SubObject 1");
    mySubList.append(mySubObject);

    mySubObject = new MySubClass;
    mySubObject->setName("SubObject 2");
    mySubList.append(mySubObject);

    /* create object list */
    MyClass *myObject = NULL;
    QList<QObject *> myList;

    myObject = new MyClass;
    myObject->setName("Object 1");
    myObject->setDataList(dataList);
    myObject->setObjectList(mySubList);
    myList.append(myObject);

    myObject = new MyClass;
    myObject->setName("Object 2");
    myObject->setDataList(dataList);
    myList.append(myObject);

    qDebug () << myList.size();

    myObject = NULL;

    /* start engine and expose object list */
    QQmlApplicationEngine engine;

    QQmlContext *myContext = engine.rootContext();
    myContext->setContextProperty("myObjectList", QVariant::fromValue(myList));

    engine.load(QUrl(QStringLiteral("qrc:///main.qml")));

    return app.exec();
}

---

为了向QObject派生类型的QML列表公开，应该使用而不是

QList

作为属性类型

MyClass.h:

Q_PROPERTY (QQmlListProperty<MySubClass> objectList READ getMySubClassList NOTIFY objectListChanged)

public:
   QQmlListProperty<MySubClass> getMySubClassList() {
      return QQmlListProperty<MySubClass>(this, 0, &MyClass::countMySubClassList, &MyClass::atMySubClassList);
   }
   static int countMySubClassList(QQmlListProperty<MySubClass> *property) {
      MyClass *m = qobject_cast<MyClass *>(property->object);
      return m->m_objectList.size();
   }
   static MySubClass *atMySubClassList(QQmlListProperty<MySubClass> *property, int index) {
      MyClass *m = qobject_cast<MyClass *>(property->object);
      return m->m_objectList[index];
   }
private:
   QList<MySubClass *> m_objectList

---

尝试在类定义之后添加

Q\u DECLARE\u元类型（MySubClass*）

，在我的例子中，QList工作正常，啊，我将QObjectList作为属性传递

谢谢，我实现了qqmlistproperty，它似乎工作正常。-这是我第一次使用QList而不是QAbstractListModel，对我来说，QQmlListProperty似乎比QAbstractListModel强大得多。你能解释一下吗？@Quperman作为模型，qabstractemodel是更强大、更简单、更灵活的解决方案。如果希望公开简单的短常量列表，可以使用QQmlListProperty作为模型。在另一种情况下，最好采用Qabstractemodel。

#ifndef MYSUBCLASS_H
#define MYSUBCLASS_H

#include <QObject>
#include <QString>

class MySubClass : public QObject
{
    Q_OBJECT
    Q_PROPERTY (QString name READ name WRITE setName NOTIFY nameChanged)

public:
    inline MySubClass(QObject *parent = 0) : QObject(parent) {}
    inline ~MySubClass() {}

    QString name() const
    {
        return m_name;
    }
public slots:
    void setName(QString arg)
    {
        if (m_name != arg) {
            m_name = arg;
            emit nameChanged(arg);
        }
    }
signals:
    void nameChanged(QString arg);

private:
    QString m_name;
};

#endif // MYSUBCLASS_H

import QtQuick 2.2
import QtQuick.Window 2.1

Window {
    visible: true
    width: 360
    height: 360

    ListView  {
        id: view
        anchors.fill: parent

        model: myObjectList

        delegate: Item {
            width: parent.width
            height: col.height
            Column {
                id: col
                Text {
                    id: nameLabel
                    text: name
                }

                Repeater {
                    id: dataView
//                    model: dataList
                    model: objectList
                    delegate: Text {
                        id: dataLabel
//                        text: modelData
                        // text: name
                          /* Here's the fix!!! (dunno why, but it works) */
                          text: modelData.name
                    }
                }
            }
        }
    }
}

Q_PROPERTY (QQmlListProperty<MySubClass> objectList READ getMySubClassList NOTIFY objectListChanged)

public:
   QQmlListProperty<MySubClass> getMySubClassList() {
      return QQmlListProperty<MySubClass>(this, 0, &MyClass::countMySubClassList, &MyClass::atMySubClassList);
   }
   static int countMySubClassList(QQmlListProperty<MySubClass> *property) {
      MyClass *m = qobject_cast<MyClass *>(property->object);
      return m->m_objectList.size();
   }
   static MySubClass *atMySubClassList(QQmlListProperty<MySubClass> *property, int index) {
      MyClass *m = qobject_cast<MyClass *>(property->object);
      return m->m_objectList[index];
   }
private:
   QList<MySubClass *> m_objectList

qmlRegisterUncreatableType<MySubClass,1>("project.mySubClass",1,0,"mySubClass","error message");