1

Hi

I have a WWWhelper class to get resources. In case of fails, we usually set a try/catch for it so it can notice user try again later.

    IEnumerator TryGet(){
        try{
            //some codes here may throw exception
            yield return StartCoroutine(WWWHelper.Get());
        }
        catch{
            Debug.log("Oops");
        }
    }

Unfortunately, the Editor said

Cannot yield a value in the body of a try block with a catch clause

So how can I make it ?
Thank you

2

I think you should check this link, I feel it explains best what I’m trying to tell you : How do I return a value from a coroutine? - Unity Answers

3

A pretty clean way to manage try/catch with WWW is to have the helper coroutine exit normally regardless of result. Then have a getter for the response value, which throws an exception if there was an error.

IEnumerator TryGet()
{
    WWWHelper helper = new WWWHelper();
    yield return StartCoroutine(helper.Get());
    try{
        //some codes here may throw exception
        helper.GetValue();
    }
    catch{
         Debug.log("Oops");
     }
}