Qt 创建一个线程执行某个函数

class TaskThread : public QThread
{
Q_OBJECT

public:
TaskThread(QObject *parent = 0);
~TaskThread();
void setFunction(QObject* obj,QString function,QVariant value=NULL);
signals:
void taskEnd();
public:
void run();
private:
int m_index;
QObject* m_obj;
QString m_function;
QVariant m_value;
QThread *m_Thread;
};

TaskThread::TaskThread(QObject *parent)
{
m_index = -1;
connect(this,SIGNAL(taskEnd()),this,SLOT(deleteLater()));
}
TaskThread::~TaskThread()
{

}

void TaskThread::setFunction(QObject* obj,QString function,QVariant value)
{
while(m_index != -1)
{
QThread::msleep(10);
}
m_index = 1;

m_obj = obj;
m_function = function;
m_value = value;
m_Thread = m_obj->thread();
m_obj->moveToThread(this);
start();
}

void TaskThread::run()
{
QByteArray ba = m_function.toLatin1();
const char* ch=ba.constData();
QMetaObject::invokeMethod(m_obj,ch,Q_ARG(QVariant, m_value));
m_index = -1;
m_obj->moveToThread(m_Thread);
emit taskEnd();
}