SKAction在删除后仍然执行

Question

我有这种方法让我的AI用来射击玩家。当AI机器人被杀死时，它会自行调用[self removeAllActions]。此操作的引用（self.shootAction）也设置为nil。然而，一旦机器人死亡并等待重生，射弹仍然会发射。我的猜测是这个方法在机器人被杀之前被调用。那时机器人是隐形的和不活跃的。有没有办法阻止这些操作或runBlocks执行？我尝试使用弱自我引用，但这没有做任何事情。

- (void)shootToward:(CGPoint)position;
{
    CGPoint enemyDirection;
    enemyDirection = ccpNormalize(ccpSub(position, self.position));

    SKAction *wait = [SKAction waitForDuration:0.5f];
    SKAction *idle = [SKAction runBlock:^{
        [self idle];
    }];
    SKAction *walkTowardsEnemy = [SKAction runBlock:^{
        [self walkWithDirection:enemyDirection];
    }];
    SKAction *fireAtEnemy = [SKAction runBlock:^{
        [self.delegate fire:self.position
                inDirection:enemyDirection owner:self projNum:0];
    }];
    SKAction *doneShooting = [SKAction runBlock:^{
        [self doneShooting];
    }];

    [self idle];

    self.shootAction = [SKAction sequence:@[walkTowardsEnemy, wait, idle, wait, fireAtEnemy, wait, doneShooting, idle]];

    [self runAction:self.shootAction withKey:@"shootAction"];
    self.shooting = YES;
}