接收数据时，EXC_BAD_ACCESS代码= 1

Question

-(void) match:(GKMatch *)match didReceiveData:(NSData *)data fromPlayer:(NSString *)playerID {
NSMutableArray* grid = (NSMutableArray*)[NSKeyedUnarchiver unarchiveObjectWithData:[data bytes]];

    _game.gameMap.grid = grid;
    [_game updateMap:_game.localPlayer.playerFleet];
    _mainGameController = [[MainGameController alloc] initMainGameControllerWithGame:_game andFrame:self.frame.size];
    [self addChild:_mainGameController.containers.overallNode];

}

-(BOOL)sendMap {
NSError* error;

NSData* packet = [NSKeyedArchiver archivedDataWithRootObject:_game.gameMap.grid];
[_game.gameCenter.match sendDataToAllPlayers: packet withDataMode:GKMatchSendDataUnreliable error:&error];
if (error != nil) {
    NSLog(@"error");
}
return false;

}

此代码在以下行返回错误的访问错误：

NSMutableArray* grid = (NSMutableArray*)[NSKeyedUnarchiver unarchiveObjectWithData:[data bytes]];

Answer 1

unarchiveObjectWithData:期望它的参数是NSData的一个实例。这不是[data bytes]返回的内容。您可能只想要data。