Question

Cocos2d对我而言是新鲜的，所以我不知道我应该对这种情况做些什么：

我想制作类似风险的游戏。现在我制作了一张像世界地图一样的背景图片（只是为了测试）。并且在这张地图上我想要一个轻扫手势，这样我就可以在我的ipad上移动地图（地图很大，所以我想在它周围滑动）。

我的问题是我不知道我应该使用的对象叫什么。以及如何以最佳方式实现手势（我是否需要自己计算动作？）。

谢谢！斯蒂芬。

Answer 1

您可以将UIKit的Pan Gesture Recognizer连接到CCDirector的视图，并在CCLayer类中处理平移手势。通过这种方式，您可以使用处理方法，在每次移动时移动背景。（代码与cocos2d 1.0.1，类似可以用2.0版本完成）

UIPanGestureRecognizer* pan = [[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesture:)] autorelease];
CCDirector* director = [CCDirector sharedDirector];
[[director openGLView] addGestureRecognizer:pan];

处理程序方法如下所示：

- (void)handlePanGesture:(UIGestureRecognizer*)gestureRecognizer {
 // If there is more than one pan gesture recognizer connected with this method, you should remember pan and check if gestureRecognizer is equal to pan 

 switch (gestureRecognizer.state) {
    case UIGestureRecognizerStateBegan: {

        // Do something that needs to be done when pan gesture started

        break;
    }
    case UIGestureRecognizerStateChanged: {

        // Get pan gesture recognizer translation
        CGPoint translation = [(UIPanGestureRecognizer*)gestureRecognizer translationInView:gestureRecognizer.view];

        // Invert Y since position and offset are calculated in gl coordinates
        translation = ccp(translation.x, -translation.y);

        // Here you should move your background, probably in oposite direction of translation vector, something like
        background.position = ccp(background.position.x - translation.x, background.position.y - translation.y);

        // Refresh pan gesture recognizer
        [(UIPanGestureRecognizer*)gestureRecognizer setTranslation:CGPointZero inView:gestureRecognizer.view];

        break;
    }
    case UIGestureRecognizerStateEnded: {

        // Do some work that should be done after panning is finished

        break;
    }
    default:
        break;
    }
}

Answer 2

我认为你正在寻找这个来添加一个对象：

CCSprite *objectName = [CCSprite spriteWithFile:@"fileName.png"];
    [self addChild:objectName];

默认情况下，我相信该对象位于左下角。

科科斯2d背景地图手势

2 个答案: