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我每2秒安排一個叫做Enemyshoot()的函數。在該函數中，我訪問存儲所有敵方對象的「enemies」矢量中的隨機對象。同時，敵人在兩秒鐘內被摧毀。我發現，當我安排enemyshoot()函數時，它可能會訪問已經銷燬的敵方物體，它會報告EXC_BAD_ACCESS。我該怎麼辦？cocos2d日程安排函數導致EXC_BAD_ACCESS
std::vector<Enemy*> enemies;
this->schedule(schedule_selector(GameScene::enemyShoot), ENEMY_SHOOT_FREQUENCY);
void GameScene::enemyShoot(float dt) {
auto random = int(CCRANDOM_0_1()*(enemies.size()-1));
Enemy *tempEnemy = enemies.at(random);
new EnemyMissle(this,tempEnemy->enemy->getPosition().x,tempEnemy->enemy->getPosition().y);
}
//this is where I delete the enemy object
if((ENEMY_COLLISION_BITMASK==a>getCollisionBitmask()&&PLAYER_MISSLE_COLLISION_BITMASK==b->getCollisionBitmask())||(ENEMY_COLLISION_BITMASK==b->getCollisionBitmask()&&PLAYER_MISSLE_COLLISION_BITMASK==a->getCollisionBitmask())){
//add the score and refresh the score label
score+=10;
__String *tempScore = __String::createWithFormat("score: %i",score);
//traversing all the enemy objects to find the collided enemy
scoreLabel->setString(tempScore->getCString());
for(int i=0;i<enemies.size();i++){
if((enemies.at(i)->enemy->getPhysicsBody()==b))
enemies.erase(enemies.begin()+i);
}
remainingEnemies--;
this->removeChild(b->getOwner());
this->removeChild(a->getOwner());
//if it is the last enemy spaceship, go to the game over scene.
if (enemies.size()==0)GameScene::GoToGameOverScene(score);
}