Created
January 5, 2021 10:50
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Cache image from server
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extension UIImageView { | |
/// Loads image from web asynchronosly and caches it, in case you have to load url | |
/// again, it will be loaded from cache if available | |
func load(url: URL, placeholder: UIImage?, cache: URLCache? = nil) { | |
let cache = cache ?? URLCache.shared | |
let request = URLRequest(url: url) | |
if let data = cache.cachedResponse(for: request)?.data, let image = UIImage(data: data) { | |
self.image = image | |
} else { | |
self.image = placeholder | |
URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in | |
if let data = data, let response = response, ((response as? HTTPURLResponse)?.statusCode ?? 500) < 300, let image = UIImage(data: data) { | |
let cachedData = CachedURLResponse(response: response, data: data) | |
cache.storeCachedResponse(cachedData, for: request) | |
self.image = image | |
} | |
}).resume() | |
} | |
} | |
} |
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