objective-c - CGRectIntersectsRect() to detect first interseption

Question

I use CGRectIntersectsRect()to see whenever a CCSprite collides with another CCSprite:

- (void)update3
{
    for (CCSprite *sprite in _monsters)
    {
        if (CGRectIntersectsRect(_rocket.boundingBox, sprite.boundingBox))
        {
            NSLog(@"Collide");
        }
    } 
}

This fires the log as long as the sprites touches each other, I just want to detect the first touch. Is this possible?

Answer 1

当两个对象第一次接触时，将首先调用此碰撞代码。此时，为了防止进一步评估，你可以在你的怪物上设置一个属性，比如isInCollision当它是 时不检查相交的边界矩形true。

当你想让你的怪物再次接收子弹时，设置isInCollision为false。