Trouble waiting for async method call - Coroutines

Hi all,
I've done a good amount of reading on coroutines and have used c# async await logic before but can't seem to get either to work in the context of a unity project.

Here is my calling function:

Code (CSharp):

1. public IEnumerator LinkAndStart(){
2.  
3. ParseScript._parseInstance.GetUserObjectId(nameInputField.text, Convert.ToInt32(pinInputField.text), pinInputField.text);
4.  
5. //I need to wait until the above completes before loading the next scene
6. StartCoroutine(LoadScene());
7. .....
8. }

Here is the func that contains a Parse sdk aync query

Code (CSharp):

1. public void GetUserObjectId(string username , int pin, string pinnumber)
2. {
3. var query = ParseObject.GetQuery("UniqueID")
4.         //var query = ParseObject.GetQuery("Users")
5.             .WhereEqualTo("PIN", pinnumber);
6.         //Task queryTask = query.FindAsync().ContinueWith(t => {
7.             query.FindAsync().ContinueWith(t => {
8.             IEnumerable<ParseObject> results = t.Result;
9.      .......  I want to return a success(true)  or failure (false) based on the result of this query
10.              
11.  
12. }

Now I've tried calling the GetUserObjecId as a Coroutine, but I get an error because you cannot put yield returns inside anonymous blocks (the parse sdk query).

I guess I'm just a little confused how I can wait for this function call to complete and return a status to the caller. Running how it is now, I'd assume that unity would wait until the called method returns, but breakpoints i have in the return statements of the query never get hit.

Any ideas?

 

Hi there!

Coroutines can't return result values.
Lambda function can be solution for your problem.

using System;

...

Action<bool> resultFunc = (bool result) => {
if (result) {
....
}
};

yield return this.StartCoroutine(XXX.Query(resultFunc));



public class XXX {

public static Enumerator Query(Action<bool> resultFunc>) {
yield return ....
....
resutlFunc(true); // or false
}

}

Cheers!
Booil.

 

Normally you just wait until the task is done. Here is one way to do it.

Code (CSharp):

1. IEnumerator LongTask (){
2.     var task = StartLongTask();
3.     while (!task.isDone) yield return null;
4.     DoNextJob();
5. }

 

ah excellent I will try this, makes a lot more sense. Thank you! Will report back. -Ethan