I want to add a treeview menu in the left side of my application like xcode treeview menu in the leftside. I didn't find any treeview ment element in the object container of xcode. Can anyone suggest me how to do it.I am using Xcode 9.3 and swift 4.

Hi there. I am developing a mac os application where i have to convert the data from server API to a zip file. The API is returning a zip file itself in encoded format of type Data, but i want to convert that data to a zip file and want to store in the disk.CODE:______ func DownloadExamZip(){ let request = NSMutableURLRequest(url: NSURL(string: "http://localhost:5000/api/DownloadExamZip/EX0000018/ST000000195/874059")! as URL) request.httpMethod = "GET" let AuthorizationToken = "Hidden" request.setValue("application/x-www-form-urlencoded; charset=utf-8", forHTTPHeaderField: "Content-Type") request.setValue(AuthorizationToken, forHTTPHeaderField: "Authorization") let task = URLSession.shared.dataTask(with: request as URLRequest) { data, response, error in do { guard data != nil else { print("data is nil") return } //Here i want to convert the type data to a zip file } catch { print("Error -> \(error)") } } task.resume() } Can anyone help me to convert that data into a zip file please. I also have to store that file in the disk.