cocos2d for iPhone

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1. 

   sungnix
   Member

   Hi all.

   I plan to run actions within schedule, but I have met some trouble.

   In init method I've defined an sequence named actionBom and call collisionDetect method by schedule. The sequence first play an animation, and then play bom sound. Unfortunately, the application was down when it run action in spriteBom method. If I comment the runAction code, the application goes well.

   Here is the code:

   - (id) init {
       self = [super init];
       if (self != nil) {
           Animation *bom = [Animation animationWithName:@"bom" delay:0.03f];
   
           for( int i=1;i<9;i++)
               [bom addFrameWithFilename: [NSString stringWithFormat:@"bom%d.png", i]];
   
           actionBom = [Sequence actions:
                        [Animate actionWithAnimation:bom],
                        [CallFunc actionWithTarget:self selector:@selector(bomSound)],
                        nil];
           [self schedule:@selector(collisionDetect:)];
       }
   
       return self;
   }
   
   -(void)collisionDetect:(ccTime)dt {
       [self spriteBom:kumo];
   }
   
   -(void)spriteBom:(Sprite *)sprite {
       [sprite runAction:[actionBom copy]];
   }
   
   -(void)bomSound {
       [[PASoundMgr sharedSoundManager] play:@"kumo"];
   }

   Posted 2 years ago #
2. 

   Clain
   Member

   What's the error message you get in the debugger console ? Also, why call [actionBom copy] ? Do you run this action on several sprites at the same time ?

   Posted 2 years ago #
3. 

   sungnix
   Member

   Sorry, if I replace [actionBom copy] with actionBom, the same result come.

   Here is the error message in GDB:
   

   [Session started at 2009-07-14 09:25:57 +0800.]
   GNU gdb 6.3.50-20050815 (Apple version gdb-966) (Tue Mar 10 02:43:13 UTC 2009)
   Copyright 2004 Free Software Foundation, Inc.
   GDB is free software, covered by the GNU General Public License, and you are
   welcome to change it and/or distribute copies of it under certain conditions.
   Type "show copying" to see the conditions.
   There is absolutely no warranty for GDB.  Type "show warranty" for details.
   This GDB was configured as "i386-apple-darwin".sharedlibrary apply-load-rules all
   Attaching to process 310.
   2009-07-14 09:25:58.185 gdb-i386-apple-darwin[311:613] _CFGetHostUUIDString: unable to determine UUID for host. Error: 35
   (gdb)

   Posted 2 years ago #
4. 

   gravity
   Member

   Well that's not really an error message...

   I'm a newbie, so take it for what it's worth, but this is what I would do:

   id actionBom = [Sequence actions:
                        [Animate actionWithAnimation:bom],
                        [CallFunc actionWithTarget:self selector:@selector(bomSound)],
                         nil];
   [self runAction:actionBom];

   I haven't used the Animate or CallFunc yet, though, so try it out, but if it's wrong, don't get mad at me.

   Posted 2 years ago #
5. 

   Clain
   Member

   @sungnix :
   The error message is just before what you posted. It often starts with "Terminating app due to uncaught exception...". If the message is unclear, once gdb is loaded, you can type bt (backtrace) and hit return on your keyboard. It will give you the line of code that made the app crash.

   Also, running an action in a scheduled method that's being called at the framerate is a bad bad bad idea. Your bom animation is made of 8 png files, each file is displayed for 0.03 second. Your bom animation lasts at least 0.24 second. And you're trying to trigger that animation every 0.03 second (if your game runs at 30 fps). There's obviously a big problem here.

   You might want to consider using a RepeatForever action. In your init instead of this last line [self schedule:@selector(collisionDetect:)];, do something like this : [kumo runAction:[RepeatForever actionWithAction:actionBom]];

   Posted 2 years ago #
6. 

   sungnix
   Member

   Thanks a lot.

   I got it!
   In init method just call retain, everything goes well.

   actionBom = [Sequence actions:
           [Animate actionWithAnimation:bom],
           [CallFunc actionWithTarget:self selector:@selector(bomSound)],
           nil];
   
   [actionBom retain];
   
   [self schedule:@selector(collisionDetect:)];

   Posted 2 years ago #

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