-2

好的，我知道这应该很简单，但是我脑子里放了一个大屁，我想不通我想要的只是敌人产卵一次。现在它每 180 秒生成一次，我希望它在 180 秒标记处只生成一次。

         [self schedule:@selector(gameLogicboss:) interval:180 ];        
          [self schedule:@selector(updateboss:)];                

     -(void)addTarget1 {

Boss *target1 = nil;    


if ((arc4random() % 2) == 0) {{
    target1 = [WeakAndFastBoss boss];
}}  else {
    target1 = [WeakAndFastBoss boss];
}                      

// Determine where to spawn the target along the Y axis
CGSize winSize = [[CCDirector sharedDirector] winSize];
int minY = target1.contentSize.height/2;
int maxY = winSize.height - target1.contentSize.height/2;
int rangeY = maxY - minY;
int actualY = (arc4random() % rangeY) + minY;

// Create the target slightly off-screen along the right edge,
// and along a random position along the Y axis as calculated above
target1.position = ccp(winSize.width + (target1.contentSize.width/2), actualY);
[self addChild:target1 ];

// Determine speed of the target

int minDuration = target1.minMoveDuration;
int maxDuration = target1.maxMoveDuration;
int rangeDuration = maxDuration - minDuration;
int actualDuration = (arc4random() % rangeDuration) + minDuration;

// Create the actions
id actionMove = [CCMoveTo actionWithDuration:actualDuration position:ccp(-target1.contentSize.width/2, actualY)];

id actionMoveDone = [CCCallFuncN actionWithTarget:self 
                                         selector:@selector(spriteMoveFinished:)];
[target1 runAction:[CCSequence actions:actionMove, actionMoveDone, nil]];
target1.tag = 1;
[_targets addObject:target1];   
     }

     -(void)gameLogicboss:(ccTime)dt {
     [self addTarget1];
       iterations_++;
   }

                    - (void)updateboss:(ccTime)dt {
            CGRect projectileRect = CGRectMake(projectile.position.x -                  (projectile.contentSize.width/2), projectile.position.y - (projectile.contentSize.height/2),                           projectile.contentSize.width,                                   projectile.contentSize.height);

    BOOL bossHit = FALSE;
    NSMutableArray *targetsToDelete = [[NSMutableArray alloc] init];
    for (CCSprite *target1 in _targets) {
        CGRect target1Rect = CGRectMake(target1.position.x - (target1.contentSize.width/2),                                    target1.position.y - (target1.contentSize.height/2),                                    target1.contentSize.width,                                  target1.contentSize.height);

        if (CGRectIntersectsRect(projectileRect, target1Rect)) {

            //[targetsToDelete addObject:target];   
            bossHit = TRUE;
            Boss *boss = (Boss *)target1;
            boss.hp--;
            if (boss.hp <= 0) {
                _score ++;
                [targetsToDelete addObject:target1];
            }
            break;

        }                       
    }

    for (CCSprite *target in targetsToDelete) {
        [_targets removeObject:target];
        [self removeChild:target cleanup:YES];                                  
        _projectilesDestroyed++;
        if (_projectilesDestroyed > 2) {

              } 
             }

    if (bossHit) {
        //[projectilesToDelete addObject:projectile];
        [[SimpleAudioEngine sharedEngine] playEffect:@"explosion.caf"];
    }
    [targetsToDelete release];
     }

-(void)spriteMoveFinishedboss:(id)sender {
    CCSprite *sprite = (CCSprite *)sender;
    [self removeChild:sprite cleanup:YES];
    GameOverScene *gameOverScene = [GameOverScene node];
    [gameOverScene.layer.label setString:@"You Lose"];
    [[CCDirector sharedDirector] replaceScene:gameOverScene];    

if (sprite.tag == 1) { // target
    [_targets removeObject:sprite];
} else if (sprite.tag == 2) { // projectile
    [_projectiles removeObject:sprite];
}
   }
4

2 回答 2

2

在这里走弯路。这段代码将让 gameLogicBoss 方法每 180 秒执行一次：

[self schedule:@selector(gameLogicboss:) interval:180];

如果您希望这种情况只发生一次，则必须在执行方法时取消调度选择器：

-(void) gameLogicboss:(ccTime)delta
{
    [self unschedule:_cmd];

    // rest of the code here …
}

_cmd是当前方法的选择器的简写。当然，您也可以使用 @selector(...) 从不同的方法取消调度选择器。

Cocos2D 2.0 还有一个名为 scheduleOnce 的方法，它只调用一次选择器，而无需手动取消调度。

于 2012-07-05T20:07:49.057 回答
0

我从未使用任何这些语言或工具进行开发，所以我真的不知道一个优雅的解决方案，但我可以为您提供一个有效的解决方案。只需创建一个布尔变量并将其初始化为 True。将生成boss的所有代码放在if控件中，这样它只在该变量设置为True时运行。Boss 生成后，将变量设置为 False。

于 2012-07-05T20:07:22.880 回答