One can physically access to the app's Document Directory on the device using iTunes File Sharing. What about the Application Support Directory? (The same way if the app is on the simulator)
Anyway one can do this?
Take a look at http://developer.apple.com/library/mac/#recipes/xcode_help-devices_organizer/articles/copy_app_data_from_sandbox.html
This should provide you with a package of all data within the App's sandbox
Related
I am writing an iOS app in Swift and Xcode where I allow users to download some files from a server and to store them into the iPhone's document directory.
How safe is it to do so?
Is it possible for a user to access one of these files from outside the app, for example by connecting their phone to a computer, and move them around or share them? If a user has a jailbroken iPhone, could he get a way to access the downloaded files in other ways other than the one I allow within my app?
And if so, should I encrypt my files when I download them?
For jailbroken iPhone i think yes it's possible to access apps directories.
For normal iPhone I'm pretty sure other apps can't access it as all third-party apps are “sandboxed"
https://support.apple.com/en-gb/guide/security/sec15bfe098e/web#:~:text=Sandboxing,information%20stored%20by%20other%20apps.
And no idea about connecting their phone to a computer.
I wrote a React Native application that downloads a file and saves it to the document directory.
The application gives me a path like this:
/Users/laurent/Library/Developer/CoreSimulator/Devices/SOMEID/data/Containers/Data/Application/SOMEID/Documents
and using macOS Finder I can see that the file has indeed been created.
My problem is how to view this file from the iOS emulator? If I click on the Files app for instance, I can't see that file. Basically is this file available to the user from somewhere and, if so, where? Or maybe I need to save it to a different directory?
Your iOS app is sandboxed by default, meaning that no other app can access its resources. The simulator is very different since it runs on your mac and stores your files there so you can easily access them.
That said, it is very simple to expose your Documents folder by adding the appropriate keys to your app's info.plist:
Add the UISupportsDocumentBrowser key to grants access to all the documents in the app’s Documents directory and have them appear in the Files app (iOS 11 and above). When this is enabled, other apps can also have access to your documents when using UIDocumentBrowserViewController.
Add the UIFileSharingEnabled key to expose the app’s Documents directory to the desktop iTunes app. When combined with the LSSupportsOpeningDocumentsInPlace key, it will also enable Files app support and document browser as mentioned above.
By default any files your application downloads are only available from within that app, they will not show up in the file system of the device.
As far as I know there is no react-native library which allows you to access the iOS file system, so you will need to make use of native iOS code to solve your problem. Besides pointing you to the official documentation, there is not much more I can do to help.
My understanding is that because of sandboxing, it isn't possible to view any text file (ie config file) associated with an iOS app using another app. Something quite simple with Android. Am I mistaken?
I am trying to implement a text config file with a Unity iOS app that gets loaded and parsed once when the application boots.
This config file would also be able to be edited and saved manually on that actual iOS device.
(addendum)
In Unity there is PersistentDataPath which resolves to /var/mobile/Container/Data/Application/foo/Documents
Is there an iOS supported file explorer app that will allow me view and edit files in this location (without jailbreaking)?
Use can check iOS App Groups. It allows multiple apps access to shared containers and allow interprocess communication. There is no so much documentation about this, but maybe that's what you're looking for. At least you can share NSUserDefaults between the apps.
NSUserDefaults it's a most simple way to save any (not big) configurations for your app. For manual editing: if your app on the device signed with developer certificate, you can connect through any iOS supported file explorer app and edit it. But after release, from App Store, your app installed in restricted/private path, so it's not possible, if only you don't have a jailbreak.
Initial configuration you can put into your app bundle, and at the first run just copy them to NSUserDefaults.
Short answer: There are utilities such as iExplorer - https://macroplant.com - that allow "file manager" type access. However...
Long answer: If your app requires users to buy (or get) other software to modify configuration files, the chances of Apple approving it are slim to none.
The appropriate thing to do is to provide a User Interface in your own app which allows the user to modify / update the settings.
Can iOS users access an app's Application Support folder? How safe is this folder?
I'm facing a dilemma between these two options:
Decrypt content (classified as Intellectual Property) and save it in app's Application Support folder in advance when app is installed to get better viewing speeds later;
Keep it encrypted and safe but sacrifice speed.
How safe is the app's Application Support folder? App by the way is coded in Objective C.
No folder is "safe". There are simple apps that let users extract the contents of their device backups made with iTunes. This means that it's trivial to see any file stored by any app on their device.
And there are countless ways to browse an iOS device's files if the iOS device is jailbroken.
So really there is no "safe" folder you can choose to really hide content from a user if the user has the slightest technical ability.
Same for any files bundled in an app. A user can unzip the ipa of any app they've ever installed on any of their iOS devices. All of the ipas are stored on their computer when they backup their device via iTunes.
Having only worked with Android/web dev before I am having a hard time figuring out where in the world my file should be getting copied to in iOS. After reading the file browser documentation on the iOS developer resource page it says that each app is an "island" which contains its own folder system. If I want to have my user be able to copy a file from my app's sdk to their iOS device, where should I put it?
I downloaded a file browser app from the app store on my iOS testing device but am I right in thinking that there is no global file browsing system?
I am using a Cordova plugin called Asset2sd which works perfectly for me in Android, getting the root storage folder and downloading the file to there. It has no iOS alternative so I'm going to have to figure something else out, I just need to know where to start. Do I have to have the user access my app's internal files somehow? Can I create a folder for them to look in when they download my app? Some documentation or something would be wonderful. I am totally lost.
Thanks!
You're right. Apps don't have access to the global file system. Each app only has access to their own app directory. Here's in-depth information on Sandboxing: https://developer.apple.com/app-sandboxing/
In your app's sandbox, you basically can manage files as you want, i.e. download, copy, move, delete, etc. So you can create a folder Downloads in your apps documents directory and then display the contents of this folder for instance in a table view.
Related documentation/links:
https://developer.apple.com/library/prerelease/ios/documentation/Cocoa/Reference/Foundation/Classes/NSFileManager_Class/index.html
https://stackoverflow.com/a/6907432/967327
https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/iPhoneAppProgrammingGuide.pdf