cocos2d-iphone - Cocos2D 2.0 - 将boundingBox坐标转换为导向器视图空间

Question

我需要在弹出框上显示 UIActionSheet，并且此弹出框有一个指向 Cocos2D 上的元素的箭头。

我需要根据将显示 UIActionSheet 的导演视图坐标计算此元素的 boundingBox rect，因此操作表箭头将指向它。

我怎么做？

Answer 1

这是我创建的一个快速示例，只需将 UIPopoverController 更改为您的 UIActionSheet。

CCNode* node = (CCNode *)sender;
CGPoint worldPoint = [node convertToWorldSpace:CGPointZero];
CGRect rect = [sender boundingBox];
rect.origin = worldPoint;
// Convert position based on Apple's anchor point from cocos2d's anchor point
rect.origin.y = rect.origin.y + rect.size.height;
CGPoint convertedLocation = [[CCDirector sharedDirector] convertToUI:ccp(rect.origin.x, rect.origin.y)];
rect.origin = convertedLocation;

UIViewController* viewController= [[UIViewController alloc] init];
[[viewController view] setBackgroundColor:[UIColor greenColor]];
UIPopoverController* c = [[UIPopoverController alloc] initWithContentViewController:viewController];
[c presentPopoverFromRect:rect inView:[[CCDirector sharedDirector] view] permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];