With iOS 17 the url must point to a temporary file. Previously the url referred directly to a file within the application bundle.

neoneye · neoneye · commit 919bc9cc9df7 · 2023-11-01T18:00:40.000+01:00
diff --git a/Source/TriangleDrawLibrary/Engine/Document.swift b/Source/TriangleDrawLibrary/Engine/Document.swift
@@ -31,10 +31,12 @@ public class Document: UIDocument {
 
 	override public func contents(forType typeName: String) throws -> Any {
 		guard let canvas: E2Canvas = self.canvas else {
+            log.error("Document.contents(forType:) canvas is nil")
 			throw DocumentError.archivingFailure
 		}
 		let data: Data = TDCanvasWriter.pbmRepresentation(from: canvas)
 		guard !data.isEmpty else {
+            log.error("Document.contents(forType:) data is nil")
 			throw DocumentError.archivingFailure
 		}
 		return data
diff --git a/Source/TriangleDrawMain/Browser/BrowserViewController.swift b/Source/TriangleDrawMain/Browser/BrowserViewController.swift
@@ -215,13 +215,28 @@ extension BrowserViewController: UIDocumentBrowserViewControllerDelegate {
         _ controller: UIDocumentBrowserViewController,
         didRequestDocumentCreationWithHandler importHandler: @escaping (URL?, UIDocumentBrowserViewController.ImportMode) -> Void) {
 
-		// When the user wants to create a new document, a blank version of a new Partiles file needs to be provided to the
-		// `UIDocumentBrowserViewController`. In this case, obtain the URL of the "Drawing.triangleDraw", which is part of the application bundle, and
-		// afterwards, perform the importHandler on the URL with a Copy operation.
-
-		let url: URL = DocumentExample.blankFile.url
-		log.debug("importHandler mode_copy with url: \(url)")
-		importHandler(url, .copy)
+        // Get url to "Drawing.triangleDraw", which is part of the application bundle.
+		let originalURL: URL = DocumentExample.blankFile.url
+
+        // Create a temporary file url
+        guard let temporaryFileURL: URL = createTemporaryFile() else {
+            log.error("Failed to create temporary file")
+            importHandler(nil, .none)
+            return
+        }
+
+        // Save a copy at the temporary location
+        do {
+            try FileManager.default.copyItem(at: originalURL, to: temporaryFileURL)
+        } catch {
+            log.error("Failed to copy file: \(error)")
+            importHandler(nil, .none)
+            return
+        }
+
+        // Import the file
+        log.debug("File copied from \(originalURL) to \(temporaryFileURL)")
+        importHandler(temporaryFileURL, .move)
 	}
 
 	/// Called when you select an existing document in the browser.
@@ -262,5 +277,11 @@ extension BrowserViewController: UIDocumentBrowserViewControllerDelegate {
 		// with custom ones. In this case, no additional activities are added.
 		return []
 	}
+}
 
+func createTemporaryFile() -> URL? {
+    let temporaryDirectory = FileManager.default.temporaryDirectory
+    let uniqueFilename = UUID().uuidString
+    let temporaryFileURL = temporaryDirectory.appendingPathComponent(uniqueFilename).appendingPathExtension("triangleDraw")
+    return temporaryFileURL
 }

Original file line number	Diff line number	Diff line change
`@@ -31,10 +31,12 @@ public class Document: UIDocument {`
`31`	`31`
`32`	`32`	`override public func contents(forType typeName: String) throws -> Any {`
`33`	`33`	`guard let canvas: E2Canvas = self.canvas else {`
	`34`	`+ log.error("Document.contents(forType:) canvas is nil")`
`34`	`35`	`throw DocumentError.archivingFailure`
`35`	`36`	`}`
`36`	`37`	`let data: Data = TDCanvasWriter.pbmRepresentation(from: canvas)`
`37`	`38`	`guard !data.isEmpty else {`
	`39`	`+ log.error("Document.contents(forType:) data is nil")`
`38`	`40`	`throw DocumentError.archivingFailure`
`39`	`41`	`}`
`40`	`42`	`return data`