合并UIImages并将其转换为gif-Swift

Question

我从Url拍摄图像，并显示我作为幻灯片拍摄的图像，并显示为有天赋。但我想用手机保存gif。如何在ImageSlider中组合图像，将其转换为gif，然后保存在手机上？

    var davetiyeGorsel = [String]()
    @IBOutlet weak var ımageSlider: UIImageView!

  let urlImage0 = URL(string: self.davetiyeGorsel[0])
                                        let data0 = try Data(contentsOf: urlImage0!)

                                            let urlImage1 = URL(string: self.davetiyeGorsel[1])
                                                let data1 = try Data(contentsOf: urlImage1!)

                                                let urlImage2 = URL(string: self.davetiyeGorsel[2])
                                                let data2 = try Data(contentsOf: urlImage2!)

                                        DispatchQueue.main.async {
                                         self.ımageSlider.animationImages = [
                                            UIImage(data: data0)!,
                                            UIImage(data: data1)!,
                                            UIImage(data: data2)! ]
                                          self.ımageSlider.animationDuration = 3
                                            self.ımageSlider.startAnimating() }