Merge pull request #20 from steve-rock/master

Fix permission not showing up on iOS15

Author: mrousavy

ios/TrackingTransparency.m

@@ -1,6 +1,10 @@
 #import "TrackingTransparency.h"
 #import <AppTrackingTransparency/AppTrackingTransparency.h>
 
+@interface TrackingTransparency ()
+@property (weak) id _observer;
+@end
+
 @implementation TrackingTransparency
 
 RCT_EXPORT_MODULE()
@@ -16,13 +20,29 @@ @implementation TrackingTransparency
 
 RCT_EXPORT_METHOD(requestTrackingPermission:(RCTPromiseResolveBlock)resolve rejector:(RCTPromiseRejectBlock)reject)
 {
-    if (@available(iOS 14, *)) {
-        [ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
-            resolve([TrackingTransparency convertTrackingStatusToString:status]);
-        }];
-    } else {
-        resolve(@"unavailable");
-    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (@available(iOS 14, *)) {
+            if (UIApplication.sharedApplication.applicationState == UIApplicationStateActive) {
+                [ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
+                    resolve([TrackingTransparency convertTrackingStatusToString:status]);
+                }];
+            }
+            else {
+                __weak TrackingTransparency *weakSelf = self;
+                
+                self._observer = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidBecomeActiveNotification object:nil queue: [NSOperationQueue mainQueue] usingBlock:^(NSNotification * _Nonnull note) {
+                    
+                    [ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
+                        resolve([TrackingTransparency convertTrackingStatusToString:status]);
+                    }];
+                    
+                    [[NSNotificationCenter defaultCenter] removeObserver:weakSelf._observer];
+                }];
+            }
+        } else {
+            resolve(@"unavailable");
+        }
+    });
 }
 
 + (NSString *) convertTrackingStatusToString:(ATTrackingManagerAuthorizationStatus) status API_AVAILABLE(ios(14)) {