ios - Sprite Kit 中的简单碰撞

Question

我有两个节点。玩家和敌人。我希望 Enemy 节点在足够近时跟随 Player 节点，并且 Enemy 节点在与 Player 节点碰撞时会停止。我得到的是 Enemy 节点位于 Player 之上并且两个节点都被推送。我想过以某种方式阻止 Enemy 节点在与 Player 发生碰撞时移动，但在我看来这应该是一种更清洁的方式。

(我通过在更新时改变它的位置来移动敌人节点)。

这是我的 GameScene.sks:

-(void)didMoveToView:(SKView *)view {

    player = [self childNodeWithName:@"character"];
    enemy  = [self childNodeWithName:@"enemy"];
    self.physicsWorld.contactDelegate = self;
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    for (UITouch *touch in touches) {
        moveToTouch = [touch locationInNode:self];
        SKNode *tile = [self nodeAtPoint:moveToTouch];
        if([tile.name isEqualToString:@"tile"])
        {
            moveToTouch = tile.position;
        }
    }
}

-(void)update:(CFTimeInterval)currentTime {

    [self walk:player to:moveToTouch];

    if((SDistanceBetweenPoints(enemy.position, player.position) < 200))
    {
        [self walk:enemy to:player.position];
    }


}

-(void)walk:(SKNode*)node to:(CGPoint)moveTo
{
    if (CGPointEqualToPoint(moveTo, CGPointZero))
    {
        return;
    }


    if(round(moveTo.y) != round(node.position.y))
    {

        if(moveTo.y > node.position.y)
        {
            node.position = CGPointMake(node.position.x,node.position.y+2);
        }
        else if (moveTo.y < node.position.y)
        {
            node.position = CGPointMake(node.position.x,node.position.y-2);
        }

    }else if(round(moveTo.x) != round(node.position.x))
    {

        if(moveTo.x > node.position.x)
        {
            node.position = CGPointMake(node.position.x+2,node.position.y);
        }
        else if (moveTo.x < node.position.x)
        {
            node.position = CGPointMake(node.position.x-2,node.position.y);
        }

    }

    float distance = SDistanceBetweenPoints(node.position, moveTo);
    if (distance < 1.0){
        moveToTouch = CGPointZero;
    }

}

Answer 1

我不知道你是如何设置你的敌人跟随玩家的。但你可以尝试

• 将敌人动态设置为 false
• 或将速度设置为 0

使用碰撞检测来了解碰撞的时间。