Real Software Forums

I have a sandboxed app that needs to open\save its configuration data in the applications container folder (I understand that this is where a sandboxed application has full read write access to.

The problem is that when I try to reference that folder it will crash the compiled application.

The code that crashes it is -
DocumentsFolder=SpecialFolder.UserLibrary.Child("Containers").Child("MyAppID").Child("Data").Child("Documents")

(DocumentsFolder is already declared as a folderitem).

If I run this without it being sandboxed then it works fine.

When sandboxed it gives this error -
An exception of class NilObjectException was not handled. The application must shut down.

Any help with this would be much appreciated as this is driving me crazy.

Thanks

try
DocumentsFolder=SpecialFolder.ApplicationData.Child("MyAppID").Child("Data").Child("Documents")

Unfortunately that folder does not exist when the app is installed, as that is the application support folder, not the containers folder.

Which OS ?
I'm assuming OS X

You should access the "Application Support" folder, the container is created for your application when it is launched. I do believe that trying to directly access the 'Container' folder is not allowed as your application does not have access to the users library folder. When you access the "Application Support" folder, it actually accesses the one within the container.

Thank you Rowlands, you are absolutely right.

Glad I could help.

Means, when your app starts, let it check for "Data".child("Documents") in its Application Support folder (which can be created by source code, if they do not exist), and Mac OS X mirrors the access to the Container?