精灵套件-移动节点与手指的运动

Question

我想让我的SKSpriteNode用我的手指平稳地移动。我玩过很多游戏，似乎无论我的手指移动多快，物体都跟着我的手指。但是用我现在的代码，我不断地失去对我的对象的控制，增加我的速度也会失去对它的控制。

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
     /* Called when a touch begins */
    for (UITouch *touch in touches) {
        CGPoint location = [touch locationInNode:self];
        SKSpriteNode *node = (SKSpriteNode *)[self nodeAtPoint:location];
        if (node.name != nil) {
            if (node.name == p1Name) {
                onP1 = true;
            }
            else if (node.name == p2Name) {
                onP2 = true;
            }
        }
    }
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    for (UITouch *touch in touches) {
        CGPoint location = [touch locationInNode:self];
        CGPoint preLocation = [touch previousLocationInNode:self];
        SKSpriteNode *paddle = (SKSpriteNode *)[self nodeAtPoint:location];
       if (paddle.name != nil) {
            if ((paddle.name == p1Name && onP1) || (paddle.name == p2Name && onP2)) {
                int paddleX = paddle.position.x + (location.x - preLocation.x);
                paddleX = MAX(paddleX, paddle.size.width/2);
                paddleX = MIN(paddleX, self.size.width - paddle.size.width/2);
                paddle.position = CGPointMake(paddleX, paddle.position.y);
            }
        }
    }
}

我如何使SKSpriteNode移动顺利与我的手指当我触摸和移动屏幕上?

Answer 1

你已经将touchesMoved代码设置为只在触摸位于精灵上方时移动精灵。因此，一旦你快速移动手指，代码就不会执行，因为触摸下面没有节点。你需要在touchesBegan期间将"当前触摸"精灵设置为属性，然后在touchesMoved期间操作它，或者在touchesMoved方法中创建不同的逻辑。