Placeholder UIImage in Swift

placeholderImage.swift

func generatePlaceholderImageWithColor(_ color: UIColor) -> UIImage? {
    let rect : CGRect = CGRect(x: 0, y: 0, width: 1, height: 1)
    UIGraphicsBeginImageContextWithOptions(rect.size, false, 0)
    color.setFill()
    UIRectFill(rect)
    let image : UIImage = UIGraphicsGetImageFromCurrentImageContext()!
    UIGraphicsEndImageContext()
    return image
}