Qt，QThreads和信号

Question

我有一个worker类，它在无限循环中从ncurses收集输入，并在按下键时发出信号。工作人员附在指南中提到的QThread。这样可以正常工作，但信号永远不会被插槽捕获。

标题文件：

#ifndef INPUT_H
#define INPUT_H

#include <QObject>
#include <QThread>

class InputWorker : public QObject {
    Q_OBJECT
public:
    InputWorker();
    ~InputWorker();
protected:
    bool running = true;

public slots:
    void run();
    void quit();

signals:
    void key(char ch);
};

class Input : public QObject {
    Q_OBJECT
public:
    Input();
public slots:
    void key(char ch);
};

#endif // INPUT_H

源文件：

#include "input.h"
#include "ncurses.h"
#include <QDebug>

InputWorker::InputWorker() {

}

InputWorker::~InputWorker() {

}

void InputWorker::run() {
    while (this->running) {
        char ch = getch();
        emit this->key(ch);
        thread()->sleep(0.3);
    }
}

void InputWorker::quit() {
    this->running = false;
}

Input::Input() : QObject() {
    InputWorker *w = new InputWorker();
    QThread *thread = new QThread();

    w->moveToThread(thread);

    connect(thread, SIGNAL(started()), w, SLOT(run()));
    connect(thread, SIGNAL(finished()), w, SLOT(quit()));
    connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
    connect(w, SIGNAL(key(char)), this, SLOT(key(char)));
    thread->start();
}

void Input::key(char ch) {
    qDebug() << ch; // never happens
}