Q_PROPERTY 与私人 setter

Question

我有一个 QObject，其属性可从 QML 访问。类似于：

Class C : public QObject {
Q_OBJECT
public:
explicit C(QObject * parent = nullptr);
Q_PROPERTY(QString ro_text READ ro_text WRITE setRo_text NOTIFY ro_textChanged)
};

是否可以使 setter(setRo_text) "private"，所以属性不能从 QML 修改，但仍然可以从 C++ 代码设置(在class里面)?

Answer 1

如果您不想从 QML 修改它，则不要声明 WRITE，并创建一个方法，每次属性更改时它都会发出信号，setter method 可以是 public 或 private 但它不能在 QML

中访问

class C: public QObject{
    Q_OBJECT
    Q_PROPERTY(QString ro_text READ ro_text NOTIFY ro_textChanged)
public:
    C(QObject *parent=nullptr): QObject(parent){

    }
    QString ro_text() const {
        return m_ro_text;
    }
Q_SIGNALS:
    void ro_textChanged();
private:
    void setRo_text(const QString & text){
        if(m_ro_text == text)
            return;
        m_ro_text = text;
        Q_EMIT ro_textChanged();
    }
    QString m_ro_text;
};

Q_PROPERTY 与私人 setter

Q_PROPERTY with private setter

c++

qt

qml

qt-quick

qproperty