let originalImage = CIImage(image: colorImageThatDefinitelyExists)blur.setValue(grayIze.outputImage, forKey: kCIInputImageKey)
let imageData: NSData?)->UIImag
当用户选择照片时,将使用以下代码自动转换为黑白照片: print("Starting black &white")
let bnwImg = orgImg?.applyingFilter("CIColorControls", withInputParameters: [kCIInputSaturationKey:0.0