Cocos2D 2.0 - 將boundingBox座標轉換爲導演視圖空間

Question

我需要在彈窗上顯示UIActionSheet，並且此彈窗具有指向Cocos2D上的元素的箭頭。

我需要在導演視圖所在的座標UIActionSheet會顯示方面來計算該元素的boundingBox的矩形，所以動作片箭頭會指向它。

我該怎麼做？

Answer 1

這是一個快速的示例中，我創建的，就在UIPopoverController更改爲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];