[iOS/ImageViewer] Proposal of Fix share image button infinite loop (#4973)

Proposal of a Fixes ( Unfortunately, I can't test the rest of the code
as the iOS camera requires a real device. )

Fixes https://github.com/JetBrains/compose-multiplatform/issues/4970

examples/imageviewer/shared/src/iosMain/kotlin/example/imageviewer/ImageViewer.ios.kt

@@ -52,22 +52,23 @@ fun getDependencies(ioScope: CoroutineScope, toastState: MutableState<ToastState
         override val sharePicture: SharePicture = object : SharePicture {
             override fun share(context: PlatformContext, picture: PictureData) {
                 ioScope.launch {
-                    val data = imageStorage.getNSDataToShare(picture)
-                    withContext(Dispatchers.Main) {
-                        val window = UIApplication.sharedApplication.windows.last() as? UIWindow
-                        val currentViewController = window?.rootViewController
-                        val activityViewController = UIActivityViewController(
-                            activityItems = listOf(
-                                UIImage(data = data),
-                                picture.description
-                            ),
-                            applicationActivities = null
-                        )
-                        currentViewController?.presentViewController(
-                            viewControllerToPresent = activityViewController,
-                            animated = true,
-                            completion = null,
-                        )
+                    imageStorage.getNSURLToShare(picture).path?.let { imageUrl ->
+                        withContext(Dispatchers.Main) {
+                            val window = UIApplication.sharedApplication.windows.last() as? UIWindow
+                            val currentViewController = window?.rootViewController
+                            val activityViewController = UIActivityViewController(
+                                activityItems = listOf(
+                                    UIImage.imageWithContentsOfFile(imageUrl),
+                                    picture.description
+                                ),
+                                applicationActivities = null
+                            )
+                            currentViewController?.presentViewController(
+                                viewControllerToPresent = activityViewController,
+                                animated = true,
+                                completion = null,
+                            )
+                        }
                     }
                 }
             }

examples/imageviewer/shared/src/iosMain/kotlin/example/imageviewer/storage/IosImageStorage.ios.kt

@@ -119,6 +119,21 @@ class IosImageStorage(
             }
         }.readData()
     }
+
+    suspend fun getNSURLToShare(picture: PictureData): NSURL = withContext(Dispatchers.IO) {
+        when (picture) {
+            is PictureData.Camera -> {
+                picture.jpgFile
+            }
+
+            is PictureData.Resource -> {
+                NSURL(
+                    fileURLWithPath = NSBundle.mainBundle.resourcePath + "/" + picture.resource,
+                    isDirectory = false
+                )
+            }
+        }
+    }
 }
 
 @OptIn(ExperimentalForeignApi::class)