在swift中将滤镜应用于图像交换高度和宽度

import CoreImage

let context = CIContext()

guard let inputImage = CIImage(image: UIImage(named: "inputImage")) else { return }

guard let filter = CIFilter(name: "CIColorControls") else { return }
filter.setValue(inputImage, forKey: kCIInputImageKey)
filter.setValue(1.0, forKey: kCIInputBrightnessKey)
filter.setValue(0.5, forKey: kCIInputContrastKey)

guard let outputImage = filter.outputImage else { return }

let outputImageSize = outputImage.extent.size

guard let outputCGImage = context.createCGImage(outputImage, from: CGRect(origin: .zero, size: outputImageSize)) else { return }

let outputUIImage = UIImage(cgImage: outputCGImage)