C# pdf generation and loading on iOS help

Unity Engine
1

Hello,

I was trying to figure out how to generate and display a pdf in a Unity app.
I would like the app, and pdf to be available for iOS, Android and web app.
Following this tutorial I was able to generate a pdf file and store in the app main folder within the simulator.

http://www.devindia.biz/unity-pdf-generation-with-sharppdf-plugin/

Unfortunately when I try to open the pdf inside the app using

    Application.OpenURL("FILE://" + path);

It did not work.

Then I was able to partially solve the problem:

I was able to generate the .pdf file in Unity Editor and in Standalone application on OSX. I realized I had trouble on storing/loading files in Unity.

   // this is working on Editor. Application.dataPath are reached by the application and files are stored in Assets/StreamingAssets folder under project in Editor   

          #if UNITY_EDITOR || UNITY_EDITOR_64
            myDoc.createPDF(Application.dataPath + "/StreamingAssets/" + attacName);
  
          
            myTable = null;
  
            #endif

    // This is working on Mac standalone application. The file is correctly saved under Application.app/Contents folder

      #if UNITY_STANDALONE
          
        myDoc.createPDF(Application.dataPath + "/" + attacName);
        myTable = null;
            #endif

The code to retrieve and open the file:

    public void openPdf() {
        string path;

            // tested working on mac
  
            #if UNITY_EDITOR || UNITY_EDITOR_64
  
          
            path = "file:" +Application.dataPath + "/StreamingAssets/" + attacName;
  
  
            #endif
  
            #if UNITY_STANDALONE
          
            path = "file:" +Application.dataPath + "/" + attacName;
          
            #endif
  
            Application.OpenURL(path);
            Debug.Log ("Button Clicked");
  
        }

So far everything works perfectly.

The pain comes with ios.

I was able to generate a pdf file with the above code in Application.persistentDataPath and getting it back from iTunes (to verify it was created) enabling UIFileSharingEnabled under info.plist. Here’s the code:

    #if UNITY_IOS
          myDoc.createPDF(Application.persistentDataPath + "/" + attacName);
         myTable = null;
        #endif

The trouble is when I try to Application.OpenUrl(path). It seems that c# code is blind to Application.persistentDataPath. Which by the way is /var/mobile/Containers/Data/Application/“ApplicationName”/Documents/“pdfName”.pdf using

    path = "file://" + Application.persistentDataPath + "/" + attacName;
        Application.OpenURL(path);

I tried also to save the file in StreamingAssets folder but Xcode didn’t like it:

UnauthorizedAccessException: Access to the path “/private/var/mobile/Containers/Bundle/Application/F105683E-B2EA-4B0C-81B7-61302C58D56C/PdfReader.app/Data/newPDF.pdf” is denied.
at Mono.Security.Cryptography.RSAManaged.GenerateKeyPair () [0x00000] in :0
at System.IO.FileStream…ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in :0
at System.IO.FileStream…ctor (System.String path, FileMode mode) [0x00000] in :0
at sharpPDF.pdfDocument.createPDF (System.String outputFile) [0x00000] in :0
at simplepdf+c__Iterator1.MoveNext () [0x00000] in :0
(Filename: currently not available on il2cpp Line: -1)

I then decided to get this wrapper

but it can only copy already formatted pdf file from StreamingAssets folder to /Raw folder on iOS device.

I am thinking I have to write my own wrapper to load data from Application.persistentDataPath on iOS, have you got any suggestion to start with?

Thank you again.

2

there are some cool tools in the forum editor. If you would use them your post would be much more readable.

please edit your post… I will not read it like this.

3

Sorry about that. I’ve edited the post, check it out.

4

Hi,
I’m struggling with the same issue on IOS. Did you find a soluton?