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Question by justkedin · Jul 19, 2014 at 11:36 AM · coroutinereturnreturn value

Return value from coroutine

I have t$$anonymous$$s non-monobehaviour script where I have a function that needed to have a delay before it does what it needs to do. But since t$$anonymous$$s cannot be done, I created a Monobehaviour script to do the waitforseconds t$$anonymous$$ng for my original script. And it went like t$$anonymous$$s:

 void Example(string message){
     StartCoroutine(sendMessage(message));
 }
 
 IEnumerator sendMessage(string message){
     yield return new WaitForSeconds(1);
     //.........
     //Send message algorithm
     //Need to return bool(if sending was successful)        
 }

 

I needed to have the bool value in my non-monobehaviour script and I need it only after the sending is done.

So my question is, can a coroutine return a value? If not, is there any alternate way I can do t$$anonymous$$s? Thanks a lot!

Comment
illustir
luislodosm

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Answer by jheiling · Jul 19, 2014 at 11:59 AM

No, you can't. But you can use a callback

 IEnumerator sendMessage(string message, Func<bool> onSuccess){
     yield return new WaitForSeconds(1);
     //.........
     //Send message algorithm
     onSuccess(result);
 }
Comment
saru15
Bunny83

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avatar image illustir · Sep 22, 2015 at 04:15 PM 0
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How does that work?

avatar image psykojello2 illustir · Sep 22, 2015 at 05:37 PM 1
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I haven't tested this of course, but something like this? (similar to jheiling's answer)

 void Example(string message){
      StartCoroutine(sendMessage(message, onSuccess, onFail));
  }
 
 void onSuccess()
 {
 }
 
 void onFail()
 {
 }
  
  IEnumerator sendMessage(string message, Action successCallback, Action failCallback){
      yield return new WaitForSeconds(1);
      //.........
      //Send message algorithm
      if(result)
          successCallback();
      else
          failCallback();
  }
avatar image SirDorius9 illustir · Jan 15, 2016 at 03:16 PM 0
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It doesn't. He probably mean Action instead of Func

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Answer by Kiwasi · Jul 19, 2014 at 11:37 AM

Here's a good video that talks through extending coroutines. Does it better then I can explain.

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vladrybak

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