KImageCache, a swift class for loading images from url and caching.

KImageCache

//
//  KImageCache.swift
//
//  Created by Kalpesh Talkar on 01/04/16.
//  Copyright © 2016 Kalpesh. All rights reserved.
//

import UIKit

class KImageCache {
    
    var imageCache = [String:UIImage]()
    
    func getImage(url: String, imageView: UIImageView, defaultImage: String) {
        if let img = imageCache[url] {
            imageView.image = img
        } else {
            // WARNING: Depricated
            /*let request: NSURLRequest = NSURLRequest(URL: NSURL(string: url)!)
            let mainQueue = NSOperationQueue.mainQueue()
            
            NSURLConnection.sendAsynchronousRequest(request, queue: mainQueue, completionHandler: { (response, data, error) -> Void in
                if error == nil {
                    let image = UIImage(data: data!)
                    self.imageCache[url] = image
                    
                    dispatch_async(dispatch_get_main_queue(), {
                        imageView.image = image
                    })
                }
                else {
                    imageView.image = UIImage(named: defaultImage)
                }
            })*/
            
            NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: url)!) { (data, response, error) in
                dispatch_async(dispatch_get_main_queue(),{
                    if error == nil {
                        let image = UIImage(data: data!)
                        self.imageCache[url] = image
                        imageView.image = image
                    }
                    else {
                        imageView.image = UIImage(named: defaultImage)
                    }
                })
            }.resume()
        }
    }
}