Almofire is a very popular library for networking related coding(eg. API call, Downloading Stuffs etc) and totally developed in swift which is replacement of AFNetworking library of ObjectiveC. It has multiple features like Image cacheing, API call integration,File downloading etc. Today we are going to dive into Download PDF file using Alamofire in Swift.
Pods are available for almofire on GitHub for integration of this library into your own project, some steps are explained as follows:-
- First create a pod file for implementing the Alamofire and MBProgressHUD
pod ‘Alamofire’ // Download PDF file
pod ‘MBProgressHUD’ //Downloading Progress Bar
- We have to create Webview Object for open downloaded PDF url.
- Use following function in view controller and pass the url string to the function.
func downloadPDFFile(urlString:String)
{
let hud = MBProgressHUD.showAdded(to: self.view, animated: true)
hud.mode = MBProgressHUDMode.annularDeterminate
hud.label.text = “Loading…”
let destination: DownloadRequest.DownloadFileDestination = { _, _ in
let documentsURL:NSURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! as NSURL
print(“***documentURL: “,documentsURL)
let PDF_name : String = “Downloded_PDF_Name”
let fileURL = documentsURL.appendingPathComponent(PDF_name)
print(“***fileURL: “,fileURL ?? “”)
return (fileURL!,[.removePreviousFile, .createIntermediateDirectories])
}
Alamofire.download(urlString, to: destination).downloadProgress(closure: { (prog) in
hud.progress = Float(prog.fractionCompleted)
}).response { response in
hud.hide(animated: true)
if response.error == nil, let filePath = response.destinationURL?.path {
print(“File Path”,filePath)
//Open this filepath in Webview Object
let fileURL = URL(fileURLWithPath: filePath)
let request = URLRequest(url: fileURL)
webView.loadRequest(request)
}
}
}
