如何将UIImage转换为BMP并另存为数据(不是JPG或PNG)

import UIKit

func convertImageToBMP(image: UIImage, filePath: String) {
    guard let cgImage = image.cgImage else {
        print("Failed to convert UIImage to CGImage.")
        return
    }
    
    let width = cgImage.width
    let height = cgImage.height
    let bitsPerComponent = 8
    let bytesPerPixel = 4
    let bytesPerRow = width * bytesPerPixel
    let colorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGImageAlphaInfo.premultipliedLast.rawValue | CGBitmapInfo.byteOrder32Big.rawValue
    
    guard let context = CGContext(data: nil, width: width, height: height, bitsPerComponent: bitsPerComponent, bytesPerRow: bytesPerRow, space: colorSpace, bitmapInfo: bitmapInfo) else {
        print("Failed to create bitmap context.")
        return
    }
    
    let rect = CGRect(x: 0, y: 0, width: width, height: height)
    context.draw(cgImage, in: rect)
    
    guard let data = context.data else {
        print("Failed to get bitmap data.")
        return
    }
    
    let imageData = NSData(bytes: data, length: bytesPerRow * height)
    imageData.write(toFile: filePath, atomically: true)
    
    print("Image converted and saved as BMP.")
}

// 使用示例
let image = UIImage(named: "example.png")!
let filePath = "/path/to/save/image.bmp"
convertImageToBMP(image: image, filePath: filePath)