Unity coroutine (MEC) not calling

Question

我正试图通过调用协程(使用更高效的协程资产(从Firestore存储url加载图像。然而，郊游并没有到来，我不明白为什么。。。

public void displayImage(string url)
{
Debug.Log("called display image: "+ url); 

Timing.RunCoroutine(_loadImageSingle(url));
}
public IEnumerator<float> _loadImageSingle(string url)
{
Debug.Log("Loading ....");
WWW wwwLoader = new WWW(url); 
yield return Timing.WaitUntilDone(wwwLoader);


singleimg.texture = wwwLoader.texture;
}

真的很感激任何指点！

Answer 1

Unity中的推论仅为IEnumerator，没有任何返回值！

然后你必须使用StartCoroutine来运行它。。。我想这发生在你没有显示的代码中？

public void displayImage(string url)
{
Debug.Log("called display image: "+ url); 
Timing.RunCoroutine(_loadImageSingle(url));
}
private IEnumerator _loadImageSingle(string url)
{
Debug.Log("Loading ....");
WWW wwwLoader = new WWW(url); 
yield return Timing.WaitUntilDone(wwwLoader);

singleimg.texture = wwwLoader.texture;
}

---

一般注意，WWW已过时。您应该使用UnityWebRequestTexture.GetTexture:

private IEnumerator _loadImageSingle(string url)
{
Debug.Log("Loading ....");

using (UnityWebRequest uwr = UnityWebRequestTexture.GetTexture(url))
{
yield return uwr.SendWebRequest();
if (uwr.isNetworkError || uwr.isHttpError)
{
Debug.Log(uwr.error);
}
else
{
// Get downloaded texture
singleimg.texture = DownloadHandlerTexture.GetContent(uwr);
}
}
}