store initial notification in static instead of ivar

Summary:
Changelog: [Internal]

I'm updating this API to match the semantics of the other new APIs, namely that they're static methods that don't depend on the instance of the native module. This should help streamline our documentation. Instead of capturing the launch notification as an ivar, we capture it in a static variable that we clear out when the object gets cleared or is invalidated, which is similar to an ivar.

Differential Revision: D53743761

packages/react-native/Libraries/PushNotificationIOS/RCTPushNotificationManager.h

@@ -11,8 +11,6 @@ extern NSString *const RCTRemoteNotificationReceived;
 
 @interface RCTPushNotificationManager : RCTEventEmitter
 
-@property (nonatomic, nullable, readwrite) UNNotification *initialNotification;
-
 typedef void (^RCTRemoteNotificationCallback)(UIBackgroundFetchResult result);
 
 + (void)didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken;
@@ -41,6 +39,12 @@ typedef void (^RCTRemoteNotificationCallback)(UIBackgroundFetchResult result);
 + (void)didReceiveRemoteNotification:(NSDictionary *)notification
               fetchCompletionHandler:(RCTRemoteNotificationCallback)completionHandler;
 
+/**
+ * Call this in `userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:`
+ * to get the correct value from .getInitialNotification in JS.
+ */
++ (void)setInitialNotification:(UNNotification *)notification;
+
 /** DEPRECATED. Use didReceiveNotification instead. */
 + (void)didReceiveLocalNotification:(UILocalNotification *)notification RCT_DEPRECATED;
 /** DEPRECATED. Use didReceiveNotification instead. */

packages/react-native/Libraries/PushNotificationIOS/RCTPushNotificationManager.mm

@@ -23,6 +23,7 @@
 static NSString *const kRemoteNotificationRegistrationFailed = @"RemoteNotificationRegistrationFailed";
 
 static NSString *const kErrorUnableToRequestPermissions = @"E_UNABLE_TO_REQUEST_PERMISSIONS";
+static UNNotification *kInitialNotification = nil;
 
 @interface RCTPushNotificationManager () <NativePushNotificationManagerIOSSpec>
 @property (nonatomic, strong) NSMutableDictionary *remoteNotificationCallbacks;
@@ -261,6 +262,11 @@ + (void)didReceiveRemoteNotification:(NSDictionary *)notification
                                                     userInfo:userInfo];
 }
 
++ (void)setInitialNotification:(UNNotification *)notification
+{
+  kInitialNotification = notification;
+}
+
 // Deprecated
 + (void)didReceiveLocalNotification:(UILocalNotification *)notification
 {
@@ -278,6 +284,18 @@ + (void)didReceiveRemoteNotification:(NSDictionary *)notification
                                                     userInfo:userInfo];
 }
 
+- (void)invalidate
+{
+  [super invalidate];
+
+  kInitialNotification = nil;
+}
+
+- (void)dealloc
+{
+  kInitialNotification = nil;
+}
+
 - (void)handleLocalNotificationReceived:(NSNotification *)notification
 {
   [self sendEventWithName:@"localNotificationReceived" body:notification.userInfo];
@@ -532,10 +550,10 @@ - (void)handleRemoteNotificationRegistrationError:(NSNotification *)notification
   // The user actioned a local or remote notification to launch the app. Notification is represented by UNNotification.
   // Set this property in the implementation of
   // userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler.
-  if (self.initialNotification) {
+  if (kInitialNotification) {
     NSDictionary<NSString *, id> *notificationDict =
-        RCTFormatUNNotificationContent(self.initialNotification.request.content);
-    if (IsNotificationRemote(self.initialNotification)) {
+        RCTFormatUNNotificationContent(kInitialNotification.request.content);
+    if (IsNotificationRemote(kInitialNotification)) {
       // For backwards compatibility, remote notifications only returns a userInfo dict.
       NSMutableDictionary<NSString *, id> *userInfoCopy = [notificationDict[@"userInfo"] mutableCopy];
       userInfoCopy[@"remote"] = @YES;