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c++ - 具有 QObject 继承的单例 - Qt

问题描述

是否可以使用 QObject 继承创建单例类？添加 QObject 继承后出现编译错误。也许问题在于静态单例创建（应该是动态的）？这是我的方法

标题

#ifndef BLUETOOTHMANAGER_H
#define BLUETOOTHMANAGER_H

#include <QObject>

class BluetoothManager : public QObject
{
    Q_OBJECT
public:
    virtual ~BluetoothManager() {}

    /// Static getter
    static BluetoothManager & GetInstance()
    {
        return instance;
    }

private:
    /// static Bluetooth manager instance
    static BluetoothManager instance;

    explicit BluetoothManager(QObject * parent);
};

#endif // BLUETOOTHMANAGER_H

和cpp文件

#include "BluetoothManager.h"

/// singleton creation
BluetoothManager BluetoothManager::instance = BluetoothManager(static_cast<QObject*>(nullptr));

BluetoothManager::BluetoothManager(QObject * parent)
    : QObject(parent)
{

}

在编译期间我有一个错误

../QtHealthApp/network/bluetooth/BluetoothManager.cpp:4:94: error: use of deleted function ‘BluetoothManager::BluetoothManager(const BluetoothManager&)’  BluetoothManager BluetoothManager::instance = BluetoothManager(static_cast<QObject*>(nullptr));
                                                                                              ^ In file included from /opt/Qt5.12.LTS/5.12.6/gcc_64/include/QtCore/qnamespace.h:43:0,
                 from /opt/Qt5.12.LTS/5.12.6/gcc_64/include/QtCore/qobjectdefs.h:48,
                 from /opt/Qt5.12.LTS/5.12.6/gcc_64/include/QtCore/qobject.h:46,
                 from /opt/Qt5.12.LTS/5.12.6/gcc_64/include/QtCore/QObject:1,
                 from ../QtHealthApp/network/bluetooth/BluetoothManager.h:4,
                 from ../QtHealthApp/network/bluetooth/BluetoothManager.cpp:1: ../QtHealthApp/network/bluetooth/BluetoothManager.h:33:20: note: declared here
     Q_DISABLE_COPY(BluetoothManager)
                    ^ /opt/Qt5.12.LTS/5.12.6/gcc_64/include/QtCore/qglobal.h:372:5: note: in definition of macro ‘Q_DISABLE_COPY’
     Class(const Class &) Q_DECL_EQ_DELETE;\
     ^

标签： c++qt

解决方案

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