URLSession download files

URLSession_Download_File.swift

func downloadFile(url: URL) {
    let downloadRequest = URLRequest(url: url)
    URLSession.shared.downloadTask(with: downloadRequest) { location, response, error in
        // To do check resoponse before saving
        guard let tempLocation = location, error == nil else { return }
        let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last
        do {
            let fullURL = try documentDirectory?.appendingPathComponent((response?.suggestedFilename!)!)
            try FileManager.default.moveItem(at: tempLocation, to: fullURL!)
            print("saved at \(String(describing: fullURL)) ")
        } catch CocoaError.fileReadNoSuchFileError {
            print("No such file")
        } catch {
            // other errors
            print("Error downloading file : \(error)")
        }
        }.resume()
}