Fix iOS hang after denying required permission and then granted

Author: luiges90

lib/src/views/disclosure_page.dart

@@ -237,18 +237,24 @@ class _DisclosurePageState extends State<DisclosurePage>
         }
       } else {
         for (final Permission perm in item.config.permissions) {
-          // ignore: avoid-ignoring-return-values, not needed.
-          await widget._service.request(perm);
+          // ignore: prefer-moving-to-variable, multiple calls needed to ensure up-to-date data.
+          var permStatus = await widget._service.status(perm);
+          if (permStatus != PermissionStatus.permanentlyDenied) {
+            // ignore: avoid-ignoring-return-values, not needed.
+            await widget._service.request(perm);
+          }
 
           if (item.config.required) {
-            var permStatus = await widget._service.status(perm);
+            // ignore: prefer-moving-to-variable, multiple calls needed to ensure up-to-date data.
+            permStatus = await widget._service.status(perm);
             while (permStatus != PermissionStatus.granted) {
               await _showRequiredPermDialog(
                 item.config.itemText,
                 _showAppSettings,
               );
               // ignore: avoid-ignoring-return-values, not needed.
               await widget._resumed.stream.firstWhere((element) => element);
+              // ignore: prefer-moving-to-variable, multiple calls needed to ensure up-to-date data.
               permStatus = await widget._service.status(perm);
             }
           }

test/widget_test/disclosure_page_test.dart

@@ -30,6 +30,8 @@ void main() {
         .thenAnswer((realInvocation) => Future.value(prefs));
     when(testStub.request(Permission.location))
         .thenAnswer((realInvocation) => Future.value(PermissionStatus.granted));
+    when(testStub.status(Permission.location))
+        .thenAnswer((realInvocation) => Future.value(PermissionStatus.granted));
 
     final config = FlutterForcePermissionConfig(
       title: 'Title',