如何UIImage的
答
试试这个
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
}
当我给源图像作为正方形并且将图像制作成圆形然后它正在返回圆形。因为它必须返回未被圆形占据的正方形的左侧部分 –
它可以帮助我,但我需要确切的背面,你能帮助我吗? –