如何創建一個開放式錫形狀的物理體

Question

如何創建一個開放式錫形狀的物理體。它應該是一個基於邊緣體，從車頂打開，我的應用程序需要收集的東西在這個機構

這是我的代碼，但不能正常工作

CGMutablePathRef path = CGPathCreateMutable(); 
CGPathMoveToPoint(path, NULL, 0, 0); 
CGPathMoveToPoint(path, NULL, 0, 60); 
CGPathMoveToPoint(path, NULL, 60, 60); 
CGPathMoveToPoint(path, NULL, 60, 0); 

node.physicsBody = [SKPhysicsBody bodyWithEdgeChainFromPath:path]; 

Answer 1

這是我的錯誤。這是工作代碼。

CGFloat offsetX = node.frame.size.width/2; 
CGFloat offsetY = node.frame.size.height/2; 
CGMutablePathRef path = CGPathCreateMutable(); 
CGPathMoveToPoint(path, NULL, 0 - offsetX, 60 - offsetY); 
CGPathAddLineToPoint(path, NULL, 0 - offsetX, 1 - offsetY); 
CGPathAddLineToPoint(path, NULL, 60 - offsetX, 1 - offsetY); 
CGPathAddLineToPoint(path, NULL, 60 - offsetX, 60 - offsetY);