iOS swift setup cache

gistfile1.txt

//Withing APP Delegate 

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        
        let cache = NSURLCache(memoryCapacity: 8 * 1024 * 1024, diskCapacity: 20 * 1024 * 1024, diskPath: nil)
        NSURLCache.setSharedURLCache(cache)
        
        return true
    }