Problem with adding object to NSMutableArray


I am having problems adding objects to my NSMutableArray. It seems that something gets added (object count increases by 1 in debugger), but the only thing added is a 0x0 (null) instead of the address of an object. I've read through everything somewhat relevant that I could find, but I couldn't find anything that seemed to answer this issue. Most related posts seem to revolve around memory management, but the solution is not jumping out at me.

I appreciate any help you can provide.

I've included what I think are the relevant parts of the code. Please tell me if you need to see anything more.


@interface GamePlayView : UIViewController
    Player *gamePlayer;
    NSMutableArray *boardObjects;

@property (retain, nonatomic) Player *gamePlayer;
@property (retain, nonatomic) NSMutableArray *boardObjects;



- (void)viewDidLoad
    // Create player

    Player *tempPlayer = [[Player alloc] initWithFrame: self.view.frame];
    if (tempPlayer == NULL) {
        NSLog(@"GamePlayView viewDidLoad: null Player");
    else gamePlayer = tempPlayer;

    // Create array of board objects

    NSMutableArray *newArray = [[NSMutableArray alloc] init];

    self.boardObjects = newArray;
    [self.boardObjects addObject: gamePlayer];  // First breakpoint here
    topObject = 0;

    BoardObject *mine = [[BoardObject alloc] initWithFrame: self.view.frame];

    [self.boardObjects addObject: mine];  // Second breakpoint here
    topObject = 1;

    [super viewDidLoad];

} // End viewDidLoad

I put breakpoints at the addObject lines (commented in code). When execution stops at the first breakpoint, the debugger shows a good tempPlayer, and a good gamePlayer (both with the same address). It shows 0 objects in boardObjects, like this:

boardObjects = (_NSArrayM *) 0x4b22080 0 objects

When I step over this breakpoint, the debugger shows 1 object in boardObjects, as follows:

boardObjects = (_NSArrayM *) 0x4b22080 1 objects
    0 = (NSObject *) 0x0

When I continue program execution, and the debugger stops at the next breakpoint, I also see a good mine object, with boardObjects still described as above. After stepping over this breakpoint, boardObjects now looks like this:

boardObjects = (_NSArrayM *) 0x4b22080 2 objects
    0 = (NSObject *) 0x0
    1 = (NSObject *) 0x0

This could be the case that tempPlayer is a local variable, after returning from the function, the local variable is automatically released.