ios – 如何镜像UIBezierPath？

我有一个UIBezierPath,我想得到它的镜像.我该如何做到这一点？

// Method for generating a path
 UIBezierPath *myPath = [self generateAPathInBounds:boundingRect];

 // ? Now I would like to mirror myPath ?

解决方法

// Method for generating a path
UIBezierPath *myPath = [self generateAPathInBounds:boundingRect];

// Create two transforms,one to mirror across the x axis,and one to
// to translate the resulting path back into the desired boundingRect
CGAffineTransform mirrorOverXOrigin = CGAffineTransformMakeScale(-1.0f,1.0f);
CGAffineTransform translate = CGAffineTransformMakeTranslation(boundingRect.width,0);

// Apply these transforms to the path
[myPath applyTransform:mirrorOverXOrigin];
[myPath applyTransform:translate];