Fix App Tracking Transparency request may fail to show.

permission_handler/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 10.2.1
+
+* Fixed an issue where App Tracking Transparency prompt may not show correctly on iOS in some situations.
+
 ## 10.2.0
 
 * Added support for the new Android 13 permissions: SCHEDULE_EXACT_ALARM, READ_MEDIA_IMAGES, READ_MEDIA_VIDEO and READ_MEDIA_AUDIO

permission_handler/pubspec.yaml

@@ -1,6 +1,6 @@
 name: permission_handler
 description: Permission plugin for Flutter. This plugin provides a cross-platform (iOS, Android) API to request and check permissions.
-version: 10.2.0
+version: 10.2.1
 repository: https://github.com/baseflow/flutter-permission-handler
 issue_tracker: https://github.com/Baseflow/flutter-permission-handler/issues
 
@@ -23,7 +23,7 @@ dependencies:
     sdk: flutter
   meta: ^1.7.0
   permission_handler_android: ^10.2.0
-  permission_handler_apple: ^9.0.7
+  permission_handler_apple: ^9.0.8
   permission_handler_windows: ^0.1.2
   permission_handler_platform_interface: ^3.9.0
 

permission_handler_apple/ios/Classes/strategies/AppTrackingTransparencyPermissionStrategy.m

@@ -11,6 +11,27 @@
 
 @implementation AppTrackingTransparencyPermissionStrategy
 
+PermissionStatusHandler storedCompletionHandler = nil;
+
++ (void)load {
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(handleAppBecomeActive)
+                                                 name:UIApplicationDidBecomeActiveNotification
+                                               object:nil];
+}
+
++ (void)handleAppBecomeActive {
+    if (@available(iOS 14, *)){
+        if (storedCompletionHandler != nil) {
+            [ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
+                PermissionStatus permissionStatus = [AppTrackingTransparencyPermissionStrategy parsePermission:status];
+                storedCompletionHandler(permissionStatus);
+                storedCompletionHandler = nil;
+            }];
+        }
+    }
+}
+
 - (PermissionStatus)checkPermissionStatus:(PermissionGroup)permission {
     if (@available(iOS 14, *)) {
         ATTrackingManagerAuthorizationStatus attPermission = [ATTrackingManager trackingAuthorizationStatus];
@@ -32,10 +53,17 @@ - (void)requestPermission:(PermissionGroup)permission completionHandler:(Permiss
     }
 
     if (@available(iOS 14, *)){
-        [ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
-            PermissionStatus permissionStatus = [AppTrackingTransparencyPermissionStrategy parsePermission:status];
-            completionHandler(permissionStatus);
-        }];
+        UIApplicationState state = [[UIApplication sharedApplication] applicationState];
+        if (state == UIApplicationStateActive) {
+            [ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
+                PermissionStatus permissionStatus = [AppTrackingTransparencyPermissionStrategy parsePermission:status];
+                completionHandler(permissionStatus);
+            }];
+        } else {
+            // If state is not UIApplicationStateActive, iOS will not show the dialog for requesting AppTrackingTransperancy permission.
+            // Store the completion handler and only start requesting when the app become Active again.
+            storedCompletionHandler = completionHandler;
+        }
     } else {
         completionHandler(PermissionStatusGranted);
     }

permission_handler_apple/pubspec.yaml

@@ -1,6 +1,6 @@
 name: permission_handler_apple
 description: Permission plugin for Flutter. This plugin provides the iOS API to request and check permissions.
-version: 9.0.7
+version: 9.0.8
 homepage: https://github.com/baseflow/flutter-permission-handler
 
 environment: