UIBezierPath - 斯威夫特2

Question

下面的代码生成以下效果：

let path = UIBezierPath() 
    path.moveToPoint(CGPoint(x: 0, y: 0)) 
    path.addLineToPoint(CGPoint(x: headerRect.width, y: 0)) 
    path.addLineToPoint(CGPoint(x: headerRect.width, y: headerRect.height)) 
    path.addLineToPoint(CGPoint(x: 0, y: headerRect.height-headerCutAway)) 
    headerMaskLayer?.path = path.CGPath 

我想改变它，这样的三角形是在右边，而左边，我该怎么办那？

Answer 1

只是交换了y值在过去的两个坐标：

path.moveToPoint(CGPoint(x: 0, y: 0)) 
path.addLineToPoint(CGPoint(x: headerRect.width, y: 0)) 
path.addLineToPoint(CGPoint(x: headerRect.width, y: headerRect.height-headerCutAway)) 
path.addLineToPoint(CGPoint(x: 0, y: headerRect.height)) 
headerMaskLayer?.path = path.CGPath