├── .gitignore
├── ImageLoader.swift
├── LICENSE
└── README.md


/.gitignore:
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1 | # CocoaPods
2 | #
3 | # We recommend against adding the Pods directory to your .gitignore. However
4 | # you should judge for yourself, the pros and cons are mentioned at:
5 | # http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control?
6 | #
7 | # Pods/
8 | .DS_Store
9 | 


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/ImageLoader.swift:
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 1 | //
 2 | //  ImageLoader.swift
 3 | //  extension
 4 | //
 5 | //  Created by Nate Lyman on 7/5/14.
 6 | //  Copyright (c) 2014 NateLyman.com. All rights reserved.
 7 | //
 8 | import UIKit
 9 | import Foundation
10 | 
11 | 
12 | class ImageLoader {
13 |     
14 |     let cache = NSCache<NSString, AnyObject>()
15 | 
16 |     class var sharedLoader : ImageLoader {
17 |     struct Static {
18 |         static let instance : ImageLoader = ImageLoader()
19 |         }
20 |         return Static.instance
21 |     }
22 |     
23 | 	func imageForUrl(urlString: String, completionHandler: @escaping (_ image: UIImage?, _ url: String) -> ()) {
24 | 		
25 | 		DispatchQueue.global(qos: .background).async {
26 | 		
27 | 			let data: NSData? = self.cache.object(forKey: urlString as NSString) as? NSData
28 | 			
29 | 			if let goodData = data {
30 | 				let image = UIImage(data: goodData as Data)
31 | 				DispatchQueue.main.async {
32 | 					completionHandler(image, urlString)
33 | 				}
34 | 				return
35 | 			}
36 | 			
37 | 			let session = URLSession.shared
38 | 			let request = URLRequest(url: URL(string: urlString)!);
39 | 			
40 | 			session.dataTask(with: request) { data, response, error in
41 | 				
42 | 				if (error != nil) {
43 | 					completionHandler(nil, urlString)
44 | 					return
45 | 				}
46 | 				
47 | 				if let data = data{
48 | 					let image = UIImage(data: data)
49 | 					self.cache.setObject(data as AnyObject, forKey: urlString as NSString)
50 | 					DispatchQueue.main.async {
51 | 						completionHandler(image, urlString)
52 | 					}
53 | 				}
54 | 			}.resume()
55 | 			
56 | 		}
57 | 	}
58 | }
59 | 


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/LICENSE:
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 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2014 Nate Lyman
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.


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/README.md:
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 1 | SwiftImageLoader
 2 | ================
 3 | 
 4 | Asynchronous Image Loader in Swift. Caches using an NSCache.
 5 | 
 6 | 
 7 | ## Usage
 8 | 
 9 | ```
10 | ImageLoader.sharedLoader.imageForUrl(urlString, completionHandler:{(image: UIImage?, url: String) in
11 | 	self.imageView.image = image
12 | }) 
13 | 


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