Objective C编译错误“没有用于初始化类型的匹配构造函数”

Question

我正在尝试实现此代码，但我在Xcode中遇到了编译错误： “没有用于初始化'PlaybackDelegate'的匹配构造函数” “从不兼容的类型'PlaybackDelegate'”分配给'PlaybackDelegate *'

我从一个有效的示例中复制/粘贴代码。但是我无法弄清楚为什么它在我的项目中不起作用。

header file
class PlaybackDelegate : public IDeckLinkVideoOutputCallback
{
DecklinkDevice*             pDecklinkDevice;

public:
    PlaybackDelegate (DecklinkDevice* owner);

virtual HRESULT QueryInterface (REFIID iid, LPVOID *ppv) {return E_NOINTERFACE;}
virtual ULONG AddRef () {return 1;}
virtual ULONG Release () {return 1;}

virtual HRESULT ScheduledFrameCompleted (IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult result);
virtual HRESULT ScheduledPlaybackHasStopped ();
};

.mm文件

playerDelegate = new PlaybackDelegate(self, deckLinkOutput);

if (playerDelegate == NULL)
{
    //NSLog(@"fout completed frame callback");
    //fout
}

---

PlaybackDelegate::PlaybackDelegate (DecklinkDevice* owner)
{
pDecklinkDevice = owner;
}

HRESULT PlaybackDelegate::ScheduledFrameCompleted (IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult result)
{
    NSLog(@"Frame Completed");
return S_OK;
}

HRESULT PlaybackDelegate::ScheduledPlaybackHasStopped ()
{
return S_OK;
}