cocos2d for iPhone

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

1. 

   SwizzerSweet
   Member

   I'm making a grid game, and one the things I'm having trouble with is how to approach an array of custom objects.

   So say we have an array called boardArray, and we want to fill it with objects of type Block ( custom class subclassing CCSprite). How would you approach this?

   Posted 2 years ago #
2. 

   jd
   Member

   NSArray accepts any object. What exact problem are you having? It seems like you know how you plan to store them.

   Posted 2 years ago #
3. 

   SwizzerSweet
   Member

   I'm doing this

   for(int i = 0; i < 64; i++)
   {
   [boardArray addObject: [[Block alloc] init]];
   }

   but then NSLog(@"Board Array count is %i", [boardArray count]); puts out 0

   Thanks for help

   Posted 2 years ago #
4. 

   mobilebros
   Moderator

   perhaps boardArray was not alloc'd, init'd.

   boardArray = [[NSMutableArray alloc] init];
   
   for(int i = 0; i < 64; i++)
   {
   [boardArray addObject: [[[Block alloc] init] autorelease]];
   }

   You prob want that autorelease on Block too... if you want it destroyed when the array goes away.

   Posted 2 years ago #
5. 

   SwizzerSweet
   Member

   Here's all the code:

   in header:

   @interface LayerGameBackground : CCLayer
   {
   NSMutableArray *boardArray;
   }

   @property (retain) NSMutableArray * boardArray;

   below @implementation:

   @synthesize boardArray;

   then in a method loadLevel:

   NSLog(@"Board array is %i",self.boardArray); //returns "the board array is 0"
   for(int i = 0; i < 64; i++)
   {
   [boardArray addObject: [[Block alloc] init]];
   }

   NSLog(@"Board Array count is %i", [boardArray count]); //returns Board Array count is 0

   Thanks for help, greatly appreciated

   Posted 2 years ago #
6. 

   jd
   Member

   Alloc init like mobilebros mentions. You declared your array, but you did not allocate the space for it.

   Posted 2 years ago #
7. 

   SwizzerSweet
   Member

   Thank you very much! Solved

   It always seems like programming difficulties come from small assumptions that snowball

   Posted 2 years ago #
8. 

   jd
   Member

   Cool. Memory management is hard at first when you are used to scripting languages or ones with automatic garbage collection.

   Posted 2 years ago #
9. 

   ironmonline
   Member

   @SwizzerSweeet - how did you solve the problem? I am having the same issue but in my case i did declare the space for the array

   Posted 9 months ago #

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