SwiftUI Catalyst App in macOS computer - Which path should I use to save an image in my Mac local disk?

Question

I have this simply code, that I run with Catalyst in macOS:

struct ContentView: View {

    @State private var pathURL = "/Users/cesare/Desktop/Test"

    var body: some View {
        VStack {
            TextField("/Users/cesare/Desktop/Test", text: $pathURL)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .padding()
            Button(action: {
                let fileUrl = URL(fileURLWithPath: self.pathURL, isDirectory: true)

                let nameImage = "ImageTest" + ".jpg"
                let fileUrlWithName = fileUrl.appendingPathComponent(nameImage)

                let imageData = UIImage(named: "2020-03-05_11-19-22_5")?.jpegData(compressionQuality: 1)
                do {
                    try imageData!.write(to: fileUrlWithName)
                } catch {
                    print("** saveImageData error: \(error.localizedDescription)")
                }
            }) {
                Text("Save Image")
            }
        }
    }
}

In Assets.xcassets I put 2020-03-05_11-19-22_5 image. When I press Save Image button, I have this error: You don’t have permission to save the file “ImageTest.jpg” in the folder “Test”. Why I don't have permission for save image in my Desktop? I tried to export the app contained in Products, without getting any results. Which path should I use to save an image in my Mac local disk?

Answer 1

To save the document in any folder, you need to set the App Sandbox to NO.