How to Display My App Documents in the Files App For Iphone

How can I display my App documents in the Files app for iPhone

If you would like to expose your App document files inside Apple's Files App you need to include the "Supports Document Browser" key in your info plist file and set it to YES:

Showing iOS app files within in the Files app

As well as UIFileSharingEnabled add this to your Info.plist

<key>LSSupportsOpeningDocumentsInPlace</key>
<true/>

Here is my test code. Works well for me on macOS 12, using Xcode 13.2,
targets: ios-15 and macCatalyst 12. Tested on real ios-15 devices.

import SwiftUI

@main
struct TestApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

    struct ContentView: View {
    let image = UIImage(systemName: "globe")!
    var body: some View {
        Image(uiImage: image).resizable().frame(width: 111, height: 111)
        Button(action: {
            saveImage(file: "globe")
        }) {
            Text("save test file")
        }
    }
    
    func saveImage(file: String) {
        do {
            let fileURL = try FileManager.default
                .url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
                .appendingPathComponent(file)
                .appendingPathExtension("png")
            try image.pngData()?.write(to: fileURL)
        } catch {
            print("could not create file: \(file)")
        }
    }
    
}

EDIT1: Starting from a "new" project in Xcode.

I created a new ios project from scratch, using Xcode 13.2 on macos 12.2-beta.
Copied and pasted the code in my answer. Then in the Targets->Info

I added the following entries:

Application supports iTunes file sharing YES

and

Supports opening documents in place YES

Compiled and ran the project on a iPhone ios-15. In the Files app,
went to On My iPhone and the TestApp folder was there, and inside was the "globe"
image file.

Added the mac catalyst in General -> Deployment Info,
removed the App sandbox from the Signing & Capabilities.

Compiled and ran the project on a iMac macos 12.2, and in the Documents
directory was the globe.png file.

App's files are Visible in 'Files' app on simulator but not on device

Restarting the iPhone fixed it!

I can only guess as to why. Perhaps iOS had cached the capabilities of an earlier version of the app which did have 'Files' access and perhaps uninstalling and re-installing the app may have also resolved it (certainly just re-installing the app by running from XCode did NOT resolve it.

But simply restarting the iPhone, then opening the 'Files' app showed the app's folder and all the files therein.

Open iOS 11 Files app and display my app's Documents folder

you can open the Files app with the scheme shareddocuments

var url = new NSUrl("shareddocuments://" + Uri.EscapeDataString(folderPath));
UIApplication.SharedApplication.OpenUrl(url);

Share Specific directory in app's Documents with Files app

Before using file system of iOS, Please check the usage of different directories of the iOS file system.

You can refer this link: https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html

As per above link, apple has clearly mentioned that:

For Documents Directory : It clearly says that this directory should only contain files that you may wish to expose to the user.

If you want something that should not be exposed to User, then dont use Documents directory, instead use Library directory for this.

For Library directory: Use the Library subdirectories for any files you don’t want exposed to the user. Your app should not use these directories for user data files.

Here, see the following screenshot from above link, which says about which directory to use when?

In short, keep your root directories content in Document directory and move all other directory with their content to Library directory OR Library/Application Support Directory. So, your intended purpose will get fulfilled.

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