必须调用向现有类添加方法并获取对非静态成员函数的引用

I have this class MediaRecorder.cpp with the methods stopRecording, startRecording and requestData. I tried to add another method that calls requestData but I can't make it work.

首先，我尝试了：

MediaRecorder.h

...
void SendData(int);
ExceptionOr<void> startRecording(Optional<int>);
ExceptionOr<void> stopRecording();
ExceptionOr<void> requestData();
...

MediaRecorder.cpp

...
void MediaRecorder::SendData(int timeslice)
{
    using namespace std::literals::chrono_literals;

    while (!s_finished)
    {
        std::cout << "Call RequestData()\n";
        this->requestData();
        std::this_thread::sleep_for(timeslice);
    }

}


ExceptionOr<void> MediaRecorder::startRecording(Optional<int> timeslice)
{
    //...
    if (timeslice)
    {
        std::thread th1 (SendData, timeslice.value());
        th1.join();
    }


    return { };
}

ExceptionOr<void> MediaRecorder::stopRecording()
{
    s_finished = true;
    //...
    return { };
}

ExceptionOr<void> MediaRecorder::requestData()
{
    //...
    return { };
}
...

错误：

reference to non-static member function must be called
        std::thread th1 (SendData, timeslice.value());

我也尝试过：

// MediaRecorder.h
ExceptionOr<void> startRecording(Optional<int>);
ExceptionOr<void> stopRecording();
ExceptionOr<void> requestData();

// MediaRecorder.cpp
static void SendData(int timeslice)
{
    using namespace std::literals::chrono_literals;

    while (!s_finished)
    {
        std::cout << "Call RequestData()\n";
        this->requestData();
        std::this_thread::sleep_for(timeslice);
    }

}

错误：

invalid use of 'this' outside of a non-static member function
         this->requestData();