Загрузка и кэширование картинок (Download with URL and Caching Images) - Swift 5

class ImageCaching {
static let catchImage = NSCache<NSString, UIImage>()

// Создать функцию
static func DownloadImage(withURL url : URL, complition : _ image : UIImage -> ()) {

let dataTask = URLSession.shared.dataTask(with: url) {data, urlData, error in

let defImage = UIImage(named: "cloud")!
var downloadImage : UIImage?

if let data = data {
downloadImage = UIImage(data: data)
}

if downloadImage != nil {
catchImage.setObject(downloadImage!, forKey: url.absoluteString as NSString)
}

DispatchQueue.main.async {
complition(downloadImage ?? defImage)
}
}

dataTask.resume()
}

static func getImage(withURL url : URL, complition : _ image : UIImage -> ()) {

if let image = catchImage.object(forKey: url.absoluteString as NSString) {

complition(image)

} else {

DownloadImage(withURL: url, complition: complition)

}

// Пример использования
ImageCaching.getImage(withURL: myURL) { (image) in
self.OutletImage.image = image
}

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Загрузка и кэширование картинок (Download with URL and Caching Images) - Swift 5

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