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私の GameManager シングルトン オブジェクトでは、次のように作成します。

// Load levels
        // Create array property to store level objects
        self.levels = [[[NSMutableArray alloc] init] autorelease];
        //Create 2 level objects with spawnRates
        Level *level1 = [[[Level alloc] initWithLevelNum:1 spawnRate:10000 bgImageName:@"Icon.png"] autorelease];
        Level *level2 = [[[Level alloc] initWithLevelNum:2 spawnRate:10000 bgImageName:@"Icon.png"] autorelease];
        Level *level3 = [[[Level alloc] initWithLevelNum:3 spawnRate:80 bgImageName:@"Icon.png"] autorelease];
        Level *level4 = [[[Level alloc] initWithLevelNum:4 spawnRate:80 bgImageName:@"Icon.png"] autorelease];
        Level *level5 = [[[Level alloc] initWithLevelNum:5 spawnRate:2 bgImageName:@"Icon.png"] autorelease];
        Level *level6 = [[[Level alloc] initWithLevelNum:6 spawnRate:1 bgImageName:@"Icon.png"] autorelease];
        //Put level objects into array property
        [_levels addObject:level1];
        [_levels addObject:level2];
        [_levels addObject:level3];
        [_levels addObject:level4];
        [_levels addObject:level5];
        [_levels addObject:level6];
        //Set current level index to 0
        self.curLevelIndex = 0;

さらに、次のようにレイヤーによって呼び出されるメソッドを実装します。

- (Level *)curLevel {
    NSLog(@"curLevelIndex is %d", _curLevelIndex);
    //returns object at current level index where at start, first slot [0] = spawnrate = 1
    return [_levels objectAtIndex:_curLevelIndex];
}

- (void)restartGame {
    _curLevelIndex = 0;
    [self nextLevel];
}

- (void)levelComplete {
    NSLog(@"curLevel spawnRate is %d", [self curLevel].spawnRate);

    //Increase currentlevelindex
    _curLevelIndex++;

    if (_curLevelIndex >= [_levels count]) {
        _curLevelIndex = 0;
        NSLog(@"resetting levels");
    } else {
        //make it faster
        //NSLog(@"current level %d", [[_levels objectAtIndex:_curLevelIndex].spawnRate ];
        NSLog(@"new level %d", _curLevelIndex);
    }

}

すべての NSLog を許してください。しかし、私の spawnRate が変更されていない理由を突き止めようとしています。私のゲームの更新メソッドでは、これを行います:

if (timeSinceLastRateBump > 3) {
        NSLog(@"DIFFICULTY INCREASES NOW>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
        [[GameManager sharedGameManager] levelComplete];
        timeSinceLastRateBump = 0;
    }

そして、これは多かれ少なかれ毎秒呼び出されます。今、私は私のNSLogでこれを取得しています:

2013-04-13 11:08:22:489 MZ[1408:3079] target added to _targets
2013-04-13 11:08:23:489 MZ[1408:3079] target added to _targets
2013-04-13 11:08:24:472 MZ[1408:3079] DIFFICULTY INCREASES NOW>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
2013-04-13 11:08:24:473 MZ[1408:3079] curLevelIndex is 1
2013-04-13 11:08:24:474 MZ[1408:3079] curLevel spawnRate is 0
2013-04-13 11:08:24:475 MZ[1408:3079] new level 2
2013-04-13 11:08:24:509 MZ[1408:3079] target added to _targets
2013-04-13 11:08:25:506 MZ[1408:3079] target added to _targets
2013-04-13 11:08:26:522 MZ[1408:3079] target added to _targets
2013-04-13 11:08:27:490 MZ[1408:3079] DIFFICULTY INCREASES NOW>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
2013-04-13 11:08:27:491 MZ[1408:3079] curLevelIndex is 2
2013-04-13 11:08:27:493 MZ[1408:3079] curLevel spawnRate is 0
2013-04-13 11:08:27:494 MZ[1408:3079] new level 3
2013-04-13 11:08:27:523 MZ[1408:3079] target added to _targets
2013-04-13 11:08:27:856 MZ[1408:3079] Globals called. Points: 1
2013-04-13 11:08:27:856 MZ[1408:3079] Globals leaving. Points: 2
2013-04-13 11:08:28:539 MZ[1408:3079] target added to _targets

これは、curLevelIndex が 0 から 1、2 に増加していることを証明しています。しかし、spawnRate は 0 のままです。なぜですか?

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