fix(ios): Register replay mask classes when sample rates are 0

CHANGELOG.md

@@ -22,6 +22,10 @@
   });
   ```
 
+### Fixes
+
+- Apply `Sentry.Mask` and `Sentry.Unmask` on iOS when you start a replay manually with both replay sample rates at `0` ([#7008](https://github.com/getsentry/sentry-react-native/pull/7008))
+
 ### Dependencies
 
 - Bump Android SDK from v8.62.0 to v8.63.0 ([#6990](https://github.com/getsentry/sentry-react-native/pull/6990))

packages/core/RNSentryCocoaTester/RNSentryCocoaTesterTests/RNSentryTests.m

@@ -290,6 +290,23 @@ - (void)testStartWithDictionaryRemovesPerformanceProperties
 // Tracing is disabled by setting tracesSampleRate and tracesSampler to nil
 }
 
+- (void)testStartRunsReplayPostInitWhenSampleRatesAreZero
+{
+    id replayMock = OCMClassMock([RNSentryReplay class]);
+    NSError *error = nil;
+
+    NSDictionary *_Nonnull mockedReactNativeDictionary = @{
+        @"dsn" : @"https://abcd@efgh.ingest.sentry.io/123456",
+        @"replaysSessionSampleRate" : @0,
+        @"replaysOnErrorSampleRate" : @0,
+    };
+    [RNSentryStart startWithOptions:mockedReactNativeDictionary error:&error];
+
+    XCTAssertNil(error);
+    OCMVerify(ClassMethod([replayMock postInit]));
+    [replayMock stopMocking];
+}
+
 - (void)testStartCaptureFailedRequestsIsDisabled
 {
     NSError *error = nil;

packages/core/ios/RNSentryStart.m

@@ -59,10 +59,8 @@ + (void)startWithOptions:(SentryOptions *)options jsSdkVersion:(NSString *_Nulla
     [SentrySDK startWithOptions:options];
 
 #if SENTRY_TARGET_REPLAY_SUPPORTED
-    if (options.sessionReplay.sessionSampleRate > 0
-        || options.sessionReplay.onErrorSampleRate > 0) {
-        [RNSentryReplay postInit];
-    }
+    // Replay can start manually with both sample rates at 0, so always register the RN classes.
+    [RNSentryReplay postInit];
 #endif
 
     [self postDidBecomeActiveNotification];