Facebook SDK FB.API发布带有用户消息的屏幕截图

Question

I'm trying to post a screenshot and upload it to the user's facebook account. I'm working with unity (c#) and using facebook SDK and it's working fine with the example code i got from their Docs.

I even managed to "pre-fill" a message and post it with the screenshot. But pre-filling a message is against Facebook Platform Policy exanples , so i'm looking for a way to use the same method and let the user fill in a message while i don't break Facebook Platform Policy.

here is the working code i used:

     private IEnumerator TakeScreenshot()
     {
         yield return new WaitForEndOfFrame();

         var width = Screen.width;
         var height = Screen.height;
         var tex = new Texture2D(width, height, TextureFormat.RGB24, false);
         // Read screen contents into the texture
         tex.ReadPixels(new Rect(0, 0, width, height), 0, 0);
         tex.Apply();
         byte[] screenshot = tex.EncodeToPNG();

         var wwwForm = new WWWForm();
         wwwForm.AddBinaryData("image", screenshot, "InteractiveConsole.png");
         wwwForm.AddField("message","some message"); // violating Facebook Platform Policy
         FB.API("me/photos", Facebook.HttpMethod.POST, Callback, wwwForm);
     }

Answer 1

This is where InputField and Button components comes into play. Get user message with InputField and send when Button is clicked. You can hide both the InputField and send Button before taking screenshot.

public InputField userInput;
public Button postButton;


public void OnEnable()
{
    postButton.onClick.AddListener(postToFB);
}

void postToFB()
{
    Debug.Log("Posting To FB");
    StartCoroutine(TakeScreenshot(userInput.text));
}

private IEnumerator TakeScreenshot(string textToPost)
{
    //Hide User Input
    userInput.gameObject.SetActive(false);

    //Hide Send Button
    postButton.gameObject.SetActive(false);

    yield return new WaitForEndOfFrame();

    var width = Screen.width;
    var height = Screen.height;
    var tex = new Texture2D(width, height, TextureFormat.RGB24, false);
    // Read screen contents into the texture
    tex.ReadPixels(new Rect(0, 0, width, height), 0, 0);
    tex.Apply();
    byte[] screenshot = tex.EncodeToPNG();

    var wwwForm = new WWWForm();
    wwwForm.AddBinaryData("image", screenshot, "InteractiveConsole.png");
    wwwForm.AddField("message", textToPost);
    FB.API("me/photos", Facebook.HttpMethod.POST, Callback, wwwForm);
}

public void OnDisable()
{
    postButton.onClick.RemoveAllListeners();
}