将UIImage从BGR转换为RGB

import UIKit

func convertBGRtoRGB(image: UIImage) -> UIImage? {
    guard let cgImage = image.cgImage else { return nil }
    
    let colorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.noneSkipFirst.rawValue)
    guard let context = CGContext(data: nil, width: cgImage.width, height: cgImage.height, bitsPerComponent: 8, bytesPerRow: cgImage.width * 4, space: colorSpace, bitmapInfo: bitmapInfo.rawValue),
          let data = context.data else { return nil }
    
    context.draw(cgImage, in: CGRect(x: 0, y: 0, width: cgImage.width, height: cgImage.height))
    
    if let pixels = data {
        let pixelData = pixels.bindMemory(to: UInt8.self, capacity: cgImage.width * cgImage.height * 4)
        for y in 0..<cgImage.height {
            for x in 0..<cgImage.width {
                let pixelIndex = (y * cgImage.width + x) * 4
                let temp = pixelData[pixelIndex]
                pixelData[pixelIndex] = pixelData[pixelIndex + 2]
                pixelData[pixelIndex + 2] = temp
            }
        }
    }
    
    guard let newCGImage = context.makeImage() else { return nil }
    return UIImage(cgImage: newCGImage)
}