如何以不同的分辨率计算UIImage的裁剪尺寸(rect)

func calculateCropRect(image: UIImage, targetSize: CGSize) -> CGRect {
    let imageSize = image.size
    let widthRatio = targetSize.width / imageSize.width
    let heightRatio = targetSize.height / imageSize.height
    let scaleRatio = max(widthRatio, heightRatio)
    
    let scaledWidth = imageSize.width * scaleRatio
    let scaledHeight = imageSize.height * scaleRatio
    let x = (scaledWidth - targetSize.width) / 2.0
    let y = (scaledHeight - targetSize.height) / 2.0
    
    return CGRect(x: x, y: y, width: targetSize.width, height: targetSize.height)
}