删除时的分段故障（信号SIGSEGV），在模式策略中分配策略

Question

我不知道为什么它无法正常工作，在删除时，将新策略分配给基指针都会导致崩溃。

SendStrategy.h

#ifndef SENDSTRATEGY_H
#define SENDSTRATEGY_H

#include <QByteArray>
#include "QDebug"

class SendStrategy
{
public:
    virtual ~SendStrategy();
    virtual void sendDatagramData(QByteArray array) = 0;
};

#endif // SENDSTRATEGY_H

SendStrategy.cpp

#include "SendStrategy.h"

SendStrategy::~SendStrategy()
{

}

ConcreteStrategy.h

#ifndef SOCKETUDPSENDSTRATEGY_H
#define SOCKETUDPSENDSTRATEGY_H

#include <QObject>
#include <QUdpSocket>

#include <Utilities/SendStrategy.h>

class SocketUdpSendStrategy: public SendStrategy
{
private:
    QUdpSocket* socket;
    QHostAddress address;
public:
    SocketUdpSendStrategy();
    ~SocketUdpSendStrategy();
    void sendDatagramData(QByteArray array);
};

#endif // SOCKETUDPSENDSTRATEGY_H

SetStrategyMethod实现

void SendModel::setSendStrategy(SendStrategy* newStrategy)
{
    delete sendStrategy;
    sendStrategy = newStrategy;
}

那我怎么称呼那个函数

sendModel->setSendStrategy(new SocketUdpSendStrategy());

默认为SendStrategy* sendStrategy = nullptr;