Proyectos de Subversion Iphone Microlearning

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//
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//  ImageCache.swift
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//  twogetskills
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//
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//  Created by Efrain Yanez Recanatini on 3/9/22.
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//
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import UIKit
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protocol ImageCache {
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    subscript(_ url: URL) -> UIImage? { get set }
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}
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struct TemporaryImageCache: ImageCache {
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    private let cache: NSCache<NSURL, UIImage> = {
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        let cache = NSCache<NSURL, UIImage>()
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        cache.countLimit = 100 // 100 items
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        cache.totalCostLimit = 1024 * 1024 * 600 // 600 MB
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        return cache
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    }()
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    subscript(_ key: URL) -> UIImage? {
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        get { cache.object(forKey: key as NSURL) }
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        set { newValue == nil ? cache.removeObject(forKey: key as NSURL) : cache.setObject(newValue!, forKey: key as NSURL) }
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    }
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}