PDFDwonloadwithoutAlamofire.swift

func savePdf() {

                   let pdfData = try? Data.init(contentsOf: URL(string: "http://www.africau.edu/images/default/sample.pdf")!)
        
                   let documentURL = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).first! as URL
        
                   let pdfNameFromUrl = "TestFile-\(Int.random(in: 1..<10000)).pdf"
        
                   let actualPath = documentURL.appendingPathComponent(pdfNameFromUrl)
        
                   do {
                       try pdfData?.write(to: actualPath, options: .atomic)
                       debugPrint(actualPath)
                   }
                    
                   catch {
                       debugPrint(error.localizedDescription)
                   }
           }