struct DocumentsDirectory {
        static let localDocumentsURL: NSURL? =  FileManager.default.urls(for:     FileManager.SearchPathDirectory.documentDirectory, in:     .userDomainMask).last! as NSURL
    static var url: NSURL? =   FileManager.default.url(forUbiquityContainerIdentifier: nil)! as NSURL
    static let iCloudDocumentsURL: NSURL? = url?.appendingPathComponent("Documents")! as! NSURL
}