cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   oscarmk
   Member

   Hello,

   Here is what I am intending to do. I have a sprite that is running 2 actions simultaneously like this:

   [mySprite runAction:myAction1];
   [mySprite runAction:myAction2];

   And I need to call a function once those actions complete right now all I am doing is adding this line below those 2:

   [self schedule:@selector(actionFinished:) interval:myAction1duration];

   This is working fine, but I know there is probably a way to do this better. Is there a callback for those functions?. What I want to do is something like this

   id Sequence = [Sequence actions: myAction1, myAction2, callFunc, nil];

   I know this will call my function after myAction2 is finished. The problem is I need myAction1 and my Action2 to be "grouped" as an Action and then call the function in my sequence something like this:

   id Sequence = [Sequence actions:myAction1andmyAction2, callFunc, nil];

   How can I achieve this?, or what would be a workaround this? (Besides the one I already have of simply calling the selector after the actions duration time).

   Thank you.
   -Oscar

   Posted 1 year ago #
2. 

   bradparks
   Member

   couldn't you just do the following? I'm not quite sure what you mean by "group"...

   id Sequence1 = [Sequence actions: myAction1, myAction2, nil];
   id Sequence2 = [Sequence actions: Sequence1, callFunc, nil];

   Posted 1 year ago #
3. 

   liquidchaz
   Member

   By "grouped" you mean myAction1 & myAction2 need to be running simultaneously, right? So you have two actions running at the same time and then a function called when that's complete? If that's the case I would just do this:

   id sequence = [Sequence actions: myAction1, callfunc, nil];
   
   [mySprite runAction:sequence];
   [mySprite runAction:myAction2];

   That will start both actions at the same time and the call the function when myAction1 completes. Is that what you needed?

   Posted 1 year ago #
4. 

   oscarmk
   Member

   Yes that is exactly what i needed. I think both solutions work. Thank you bradparks and liquidchaz for your help.

   EDIT: Actually the solution that works for me is the one liquidchaz posted. Thank you again.

   Posted 1 year ago #
5. 

   kalx
   Member

   Liquidchaz's solution should work. The one bradparks posted is effectively the same thing as the Sequence of all 3 actions that you had in your original post.

   You can also take a look at the Spawn action. Spawn is the opposite of sequence; While Sequence performs actions one after another, Spawn starts them simultaneously.

   So you could do something like:
   id sequence = [Sequence actions: [Spawn actions: myAction1,myAction2,nil], callfunc, nil]];
   This'll run myaction1 and myaction2 at the same time, and once both are finished, it'll do the callfunc.

   How is it different from liquidchaz's code?
   In his/her example, myAction1 and myAction2 start at the same time, and callfunc occurs after myAction1 is done (myAction2 could still be going). In my example above, myAction1 and myAction2 start at the same time, and callfunc occurs after BOTH myaction1 and myaction2 have finished. So there could be a slight difference between the two implementations depending on the durations of your two actions.

   If myAction1 and myAction2 have the same duration, then either approach will end up doing the same thing. But if not, there will be that difference. Just wanted to make sure that was clear :)

   - kalx

   Posted 1 year ago #
6. 

   liquidchaz
   Member

   @kalx That's definitely the best solution. I didn't know about Spawn Action... learn something new everyday ;)

   Posted 1 year ago #

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