#Swift tutorial blog : https://iosdevcenters.blogspot.com/
This tutorial have one Class name as iOSDevCenters+GIF.swift downlaod this file and adding the file in your project. after you can use as below code.
#Load GIF image Using Name
let jeremyGif = UIImage.gifImageWithName("funny")
let imageView = UIImageView(image: jeremyGif)
imageView.frame = CGRect(x: 20.0, y: 50.0, width: self.view.frame.size.width - 40, height: 150.0)
view.addSubview(imageView)
#Load GIF image Using Data
let imageData = try? Data(contentsOf: Bundle.main.url(forResource: "play", withExtension: "gif")!)
let advTimeGif = UIImage.gifImageWithData(imageData!)
let imageView2 = UIImageView(image: advTimeGif)
imageView2.frame = CGRect(x: 20.0, y: 220.0, width: self.view.frame.size.width - 40, height: 150.0)
view.addSubview(imageView2)
#Load GIF image URL
let gifURL : String = "http://www.gifbin.com/bin/4802swswsw04.gif"
let imageURL = UIImage.gifImageWithURL(gifURL)
let imageView3 = UIImageView(image: imageURL)
imageView3.frame = CGRect(x: 20.0, y: 390.0, width: self.view.frame.size.width - 40, height: 150.0)
view.addSubview(imageView3)
#OutPut
for more referance tutorial of Swift : https://iosdevcenters.blogspot.com/