Unable to load pdf from document directory in Swift - ios

Question

I have downloaded a pdf from remote server and saved it in document directory. Now I'm trying to retrieve it and display the pdf in the webView but I keep getting this exception:
failed to find PDF header: `%PDF' not found.
before this exception it showing this exception as well:
objc[8087]: Class PLBuildVersion is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices (0x11f29dcc0) and /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/PhotoLibraryServices.framework/PhotoLibraryServices (0x11f0b46f0).
One of the two will be used. Which one is undefined.
But I have noticed that when I try to run from mobile instead of emulator then this second exception is gone. Below is my code for fetching it:
let check:String = FileNames[0] + ".pdf"
print("check = \(check)")
// Method 1
let docURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let targetURL = docURL.appendingPathComponent(check)
var request = URLRequest(url: targetURL)
webView.loadRequest(request)
/*
// Method 2
var pdfURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! as URL
pdfURL = pdfURL.appendingPathComponent(check) as URL
print("check url = \(pdfURL)")
let data = try! Data(contentsOf: pdfURL)
print("check data = \(data)")
webView.load(data, mimeType: "application/pdf", textEncodingName:"utf-8", baseURL: pdfURL) // pdfURL.deletingLastPathComponent()
*/
//let requestk = NSURLRequest(url: pdfURL as URL)
// webView.loadRequest(requestk as URLRequest)
// Method 3
/* let fileManager = FileManager.default
let documentsUrl = fileManager.urls(for: .documentDirectory, in: .userDomainMask)[0] as NSURL
var pdf = documentsUrl.appendingPathComponent(check)
print("check item fetching from documentsUrl = \(pdf)")
let req = NSURLRequest(url: pdf!)
self.webView.loadRequest(req as URLRequest)
*/
I have searched a lot about this exception and followed all the possible solutions but none of it is working. But if I try to display this pdf directly from the remote server's address it is getting displayed. And also I have checked that this pdf is stored correctly. I have tried loading through both webView.loadRequest and webView.load with data method, maybe I'm missing something small.
Update
var pdfURL = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL
print("check final = \(pdfURL)")
pdfURL = pdfURL.appendingPathComponent(check) as URL
do{
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let url = URL(fileURLWithPath: path)
var filePath = url.appendingPathComponent(check).path
let fileManager1 = FileManager.default
if fileManager1.fileExists(atPath: filePath) {
print("FILE AVAILABLE in VC")
// let fileUrlkk = NSURL(string: filePath)// converting string into URL
filePath = "file://\(filePath)"
let fileUrlkk = Foundation.URL(string: filePath)
let data = try Data(contentsOf: fileUrlkk!)
// let data = try Data(contentsOf: pdfURL) // tried but didn’t work
self.webView.load(data, mimeType: "application/pdf", textEncodingName:"", baseURL: pdfURL.deletingLastPathComponent())
} else {
print("FILE NOT AVAILABLE in VC")
}
}
catch let error as NSError {
print("An error took place: \(error)")
}
it displays "FILE AVAILABLE in VC" but still with this exception.

Answer 1

Use below code to load PDF in WebView
Swift 3.0
var pdfURL = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL
pdfURL = pdfURL.appendingPathComponent("Swift.pdf") as URL
let data = try! Data(contentsOf: pdfURL)
self.webView.load(data, mimeType: "application/pdf", textEncodingName:"", baseURL: pdfURL.deletingLastPathComponent())
Where pdf file store in Document directory here is the path.
/Documents/Swift.pdf
----- UPDATE ------
Create new project.
Drag 1 sample PDF in bundle "sample.pdf"
And change your controller code with below
that's it run
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var webView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
let check = "Swift.pdf"
var pdfURL = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL
print("check final = \(pdfURL)")
pdfURL = pdfURL.appendingPathComponent(check) as URL
if let pdfBundleURL = Bundle.main.url(forResource: "sample", withExtension: "pdf", subdirectory: nil, localization: nil) {
do {
let data = try Data(contentsOf: pdfBundleURL)
//Lastly, write your file to the disk.
try data.write(to: pdfURL, options: .atomicWrite)
}
catch {
// catch errors here
}
}
do{
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let url = URL(fileURLWithPath: path)
var filePath = url.appendingPathComponent(check).path
let fileManager1 = FileManager.default
if fileManager1.fileExists(atPath: filePath) {
print("FILE AVAILABLE in VC")
// let fileUrlkk = NSURL(string: filePath)// converting string into URL
filePath = "file://\(filePath)"
let fileUrlkk = Foundation.URL(string: filePath)
let data = try Data(contentsOf: fileUrlkk!)
// let data = try Data(contentsOf: pdfURL) // tried but didn’t work
self.webView.load(data, mimeType: "application/pdf", textEncodingName:"", baseURL: pdfURL.deletingLastPathComponent())
} else {
print("FILE NOT AVAILABLE in VC")
}
}
catch let error as NSError {
print("An error took place: \(error)")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 2

just use
do{
let directoryURL = try manager.url(for:.documentDirectory,in:.userDomainMask, appropriateFor:nil, create:true)
let docURL = NSURL(string:"XXX.pdf", relativeTo:directoryURL)
}
catch{print("ERROR")
}