智能指针信号槽

我试图std::unique_ptr通过信号/插槽传递智能指针，但由于已删除的复制构造函数 ( unique_ptr(const unique_ptr&) = delete;) 而出现错误。那么是否可以std::unique_ptr在信号/表中使用智能指针？UDP：不！ 相关问题：如何在线程之间传递大型容器？

重新制作了指针下的类std::shared_ptr<Data>。使用@yrHeTaTeJlb备注，我调用：Q_DECLARE_METATYPE(std::shared_ptr<Data>);和qRegisterMetaType<std::shared_ptr<Data>>("shared_ptr<Data>");。一切正常。

qDebug() 的输出：

Data();
finish
~Data();

主窗口.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QMap>
#include <memory>

class Data {
    QMap<int, QString> _m;  // большие
    std::array<QString, 1024*1024> _a;
public:
    Data() { qDebug() << "Data();"; }
    ~Data() { qDebug() << "~Data();"; }
    void initData();
};
Q_DECLARE_METATYPE(std::shared_ptr<Data>);

class Worker : public QObject {
    Q_OBJECT
    std::shared_ptr<Data> _d;
public:
    Worker() : QObject(), _d(std::make_shared<Data>()) { }
signals:
    void finished(std::shared_ptr<Data> d);
public slots:
    void process() { _d->initData(); emit finished(_d); }
};

class Controller : public QObject {
    Q_OBJECT
    std::shared_ptr<Data> _d;
public:
    Controller(QObject *parent = nullptr) : QObject(parent) { }
    void start();
signals:
    void finished(std::shared_ptr<Data> d);
};

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private:
    Ui::MainWindow *ui;
    Controller _c;
    std::shared_ptr<Data> _d;
};

#endif // MAINWINDOW_H

主窗口.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QDebug>
#include <QStandardItemModel>
#include <QThread>

void Data::initData() { /*some init code*/ }

void Controller::start() {
    QThread *thr = new QThread;
    Worker *w = new Worker;
    w->moveToThread(thr);
    connect(thr, &QThread::started, w, &Worker::process);
    connect(w, &Worker::finished, this, &Controller::finished);
    connect(w, &Worker::finished, thr, &QThread::quit);
    connect(w, &Worker::finished, w, &Worker::deleteLater);
    connect(thr, &QThread::finished, thr, &QThread::deleteLater);
    thr->start();
}

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow) {
    qRegisterMetaType<std::shared_ptr<Data>>("shared_ptr<Data>");
    ui->setupUi(this);
    connect(&_c, &Controller::finished, this, [this] (std::shared_ptr<Data> d) { qDebug() << "finish"; _d = d; });
    _c.start();
}

MainWindow::~MainWindow() { delete ui; }