帶有語音命令的 IEnumerator function

Question

我有一個項目，我只使用語音命令來執行一些不同的 function，其中一個是使用 Hololens 拍照。 所以我使用StartCoroutine(photoshoot()); function 調用IEnumerator photoshoot() 。 IEnumerator photoshoot()調用TakePhotosnap(); .

它完美地拍攝了照片，但是在拍攝照片后我遇到了問題，它沒有 go 回到IEnumerator 。

它停止代碼並且不能執行任何其他 function。

---

正如您在我的代碼中看到的（我輸入了一些數字來幫助我解釋 function）

我調用StartCoroutine(photoshoot()); 第 11 行，在IEnumerator photoshoot()中調用TakePhotosnap(); 第12行，直到第13行Debug.Log("we finish taking photo successfully "); 然后停止。 它應該 go 到IEnumerator photoshoot()的第 14 行。

這是我的一些代碼

private void Takephoto()

{

// this function is to call to take a photo and save it in a special folder

Debug.Log("Take Photo function call is started");

11 StartCoroutine(photoshoot());

Debug.Log("Take Photo for Hololens");

}

IEnumerator photoshoot()

{

Debug.Log(" The taking photo coroutine is started ");

yield return new WaitForEndOfFrame();

Debug.Log("Take Photo");

12 TakePhotosnap();

14 Debug.Log("Finish taking Hi again ");

yield return new WaitForEndOfFrame();

GameObject.Find("Cube").transform.localPosition = new Vector3(Random.Range(-1, 1), 0, Random.Range(1, 3));

GameObject.Find("Cube").SetActive(true);

}

--------------------------------------------

private void TakePhotosnap()

{

Debug.Log("TakePhoto Call StartPhotoModeAsync () method to start the photo mode");

Debug.Log("snap pic taken");

PhotoCapture.CreateAsync(false, OnPhotoCaptureCreated);

}

void OnPhotoCaptureCreated(PhotoCapture captureObject)

{

//Store objects, configure shooting parameters and start shooting mode.

Debug.Log("Start taking photo calling function");

photoCaptureObject = captureObject;

Debug.Log("set camera parameters");

Resolution cameraResolution = PhotoCapture.SupportedResolutions.OrderByDescending((res) => res.width * res.height).First();

CameraParameters c = new CameraParameters();

/// c= CameraParameters

c.hologramOpacity = 1.0f;

c.cameraResolutionWidth = cameraResolution.width;

c.cameraResolutionHeight = cameraResolution.height;

c.pixelFormat = CapturePixelFormat.BGRA32;

Debug.Log("camera parameters finish");

captureObject.StartPhotoModeAsync(c, OnPhotoModeStarted);

}

private void OnPhotoModeStarted(PhotoCapture.PhotoCaptureResult result)

{

if (result.success)

{

//string filename = string.Format(@"CapturedImage{0}_n.jpg", Time.time);

string filename = string.Format(@"alc.jpg", Time.time);

Debug.Log("FileName: =" + filename);

string filePath = System.IO.Path.Combine(Application.persistentDataPath, filename);

Debug.Log("filePath: =" + filePath);

/////

string targetPath = @"C: \Users\ABC\Pictures\Camera Roll";

string destFile = System.IO.Path.Combine(targetPath, filename);

Debug.Log("destFile: =" + destFile);

if (!System.IO.File.Exists(filePath))

{

//System.IO.File.Create(filePath);

System.IO.File.Create(filePath).Dispose();

}

// https://blog.csdn.net/Lee_gc/java/article/details/79919042

Debug.Log("filePath filePath: =" + filePath);

string filePath2 = System.IO.Path.Combine(Application.dataPath, filename);

Debug.Log("filePath2: =" + filePath2);

Debug.Log("finish to set photo file path and name");

//photoCaptureObject.TakePhotoAsync(filePath, PhotoCaptureFileOutputFormat.JPG, OnCapturedPhotoToDisk);

Debug.LogError("Saved That Image Somewhere" + "FileName: =" + filename + " FilePath: = " + filePath + " FilePath2: = " + filePath2);

Debug.Log("finish to copy photo to new directory");

Debug.Log("finish photo");

photoCaptureObject.TakePhotoAsync(filePath, PhotoCaptureFileOutputFormat.JPG, OnCapturedPhotoToDisk);

13 Debug.Log("we finish taking photo successfuly ");

}

else

{

Debug.LogError("Unable to start photo mode!");

}

}

// clean up

void OnStoppedPhotoMode(PhotoCapture.PhotoCaptureResult result)

{

Debug.Log("result=" + result);

photoCaptureObject.Dispose();

photoCaptureObject = null;

}

void OnCapturedPhotoToDisk(PhotoCapture.PhotoCaptureResult result)

{

if (result.success)

{

Debug.Log("Saved Photo to disk!");

photoCaptureObject.StopPhotoModeAsync(OnStoppedPhotoMode);

}

else

{

Debug.Log("Failed to save Photo to disk");

}

}

}

我的代碼有什么問題？ 有沒有其他方法可以解決它？

Answer 1

事實上，代碼 14 的運行時間比您想象的要早。 在TakePhotosnap function 中，當異步方法PhotoCapture.CreateAsync()運行到時，該方法會將控制權返回給調用方法，然后“再次完成拍攝”將立即為 output。 另外，也因為異步，在TakePhotoAsync方法返回任何結果之前，代碼13會是output，所以它並不代表照片拍攝成功。

因此，我們建議您在代碼中添加斷點以確定代碼 14 是否執行，並嘗試將日志語句移至回調。 例如：

photoCaptureObject.TakePhotoAsync(filePath, PhotoCaptureFileOutputFormat.JPG, OnCapturedPhotoToDisk);

Debug.Log("we finish taking photo successfuly ");

=>

photoCaptureObject.TakePhotoAsync(filePath, PhotoCaptureFileOutputFormat.JPG, OnCapturedPhotoToDisk);


void OnCapturedPhotoToDisk(PhotoCapture.PhotoCaptureResult result)

{
    if (result.success)

    {

        Debug.Log("we finish taking photo successfuly ");

    }
}

此外，這個文檔值得你一讀： Asynchronous Programming with async and await