ios - 如何在 UIImage 中屏蔽 XOR

Question

我希望 UIImage 屏蔽如下图所示的内容，但使用 coregraphics 屏蔽，任何答案都值得赞赏

Answer 1

func maskImage(image:UIImage, mask:(UIImage))-> UIImage {

    let imageReference = image.cgImage

    let maskReference = mask.cgImage

    let imageMask = CGImage(maskWidth: maskReference!.width, height: maskReference!.height, bitsPerComponent: maskReference!.bitsPerComponent, bitsPerPixel: maskReference!.bitsPerPixel, bytesPerRow: maskReference!.bytesPerRow, provider: maskReference!.dataProvider!, decode: nil, shouldInterpolate: true)

    let maskedReference = imageReference!.masking(imageMask!)

    let maskedImage = UIImage(cgImage:maskedReference!)

    return maskedImage

}