Qt库事件循环问题

尝试1：
我将我的主类修改为子类QThread而不是QObject,并在run()中创建一个QEventLoop,连接所有信号/槽,并执行该线程.
但它没有说没有QApplication就没有QEventLoop.

尝试2：
我修改了主类(仍然继承QThraed)而不是实例化QCoreApplication,然后执行应用程序.
警告说QApplication不是在main()线程中创建的,仍然不会发出信号.

我不确定该怎么做.我显然无法在将使用我的插件的应用程序中创建QCoreApplication,并且我无法在没有插件的情况下发出信号.

我已经包含了一个简单的(并且可怕写的)测试应用程序,它应该说明我的问题：

任何帮助,将不胜感激！

main.cpp中：

#include <iostream>
#include "ThreadThing.h"
using namespace std;
int main(int argc,char *argv[])
{
    cout << "Main: " << 1 << endl;
    ThreadThing thing1;
    cout << "Main: " << 2 << endl;
    thing1.testStart();
    cout << "Main: " << 3 << endl;
    thing1.testEnd();
    cout << "Main: " << 4 << endl;
    thing1.wait(-1);
    cout << "Main: " << 5 << endl;
    return 0;
}

ThreadThing.h：

#ifndef THREADTHING_H
#define THREADTHING_H
#include <QThread>
class ThreadThing : public QThread
{
    Q_OBJECT
public:
    ThreadThing();
    virtual void run();
    void testStart();
    void testEnd();
public slots:
    void testSlot();
signals:
    void testSignal();
};
#endif//THREADTHING_H

ThreadThing.cpp：

#include "ThreadThing.h"
#include <iostream>
#include <QCoreApplication>

using namespace std;

ThreadThing::ThreadThing()
{
    cout << "Constructor: " << 1 << endl;
    this->start();
    cout << "Constructor: " << 2 << endl;
}

void ThreadThing::run()
{
    cout << "Run: " << 1 << endl;
    int i = 0;
    cout << "Run: " << 2 << endl;
    QCoreApplication* t = new QCoreApplication(i,0);
    cout << "Run: " << 3 << endl;
    connect(this,SIGNAL(testSignal()),this,SLOT(testSlot()),Qt::QueuedConnection);
    cout << "Run: " << 4 << endl;
    t->exec();
    cout << "Run: " << 5 << endl;
}

void ThreadThing::testStart()
{
    cout << "TestStart: " << 1 << endl;
    emit testSignal();
    cout << "TestStart: " << 2 << endl;
}

void ThreadThing::testEnd()
{
    cout << "TestEnd: " << 1 << endl;
    this->quit();
    cout << "TestEnd: " << 1 << endl;
}

void ThreadThing::testSlot()
{
    cout << "TEST WORKED" << endl;
}

输出：

Main: 1
Constructor: 1
Constructor: 2
Main: 2
TestStart: 1
TestStart: 2
Main: 3
TestEnd: 1
TestEnd: 1
Main: 4
Run: 1
Run: 2
WARNING: QApplication was not created in the main() thread.
Run: 3
Run: 4