fix(ios): Break RNSentryOnDrawReporterView retain cycle in emit-new-frame block

The emit-new-frame block created in `createEmitNewFrameEvent` captured
`self` strongly, closing a `view → framesListener → block → view` loop
that kept every TTID/TTFD reporter view and its `RNSentryFramesTrackerListener`
alive for the process lifetime. Capture `self` weakly so the trio can be
deallocated once React Native releases the view.

Fixes #6440

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: alwx

CHANGELOG.md

@@ -17,6 +17,7 @@
 - Fix iOS time-to-initial-display fallback spans reporting a spurious `deadline_exceeded` status and inflated duration ([#6438](https://github.com/getsentry/sentry-react-native/pull/6438))
 - Fix `TypeError` when `showFeedbackForm`/`showFeedbackButton`/`showScreenshotButton` is called before `FeedbackFormProvider` mounts ([#6435](https://github.com/getsentry/sentry-react-native/pull/6435))
 - Fix orphaned TTID/TTFD spans in the trace view ([#6437](https://github.com/getsentry/sentry-react-native/pull/6437))
+- Fix iOS retain cycle in `RNSentryOnDrawReporterView` leaking TTID/TTFD reporter views and their frame-tracker listeners ([#6440](https://github.com/getsentry/sentry-react-native/issues/6440))
 
 ### Internal
 

packages/core/RNSentryCocoaTester/RNSentryCocoaTesterTests/RNSentryOnDrawReporterTests.swift

@@ -145,4 +145,22 @@ final class RNSentryOnDrawReporterTests: XCTestCase {
 
         emitNewFrameCallback!(1)
     }
+
+    func testReporterViewIsDeallocatedAfterRelease() {
+        // Guards against the retain cycle described in
+        // https://github.com/getsentry/sentry-react-native/issues/6440 where the
+        // emit-new-frame block captured `self` strongly, keeping the view (and
+        // its frames-tracker listener) alive forever.
+        weak var weakReporter: RNSentryOnDrawReporterView?
+
+        autoreleasepool {
+            let reporter = RNSentryOnDrawReporterView.createWithMockedListener()
+            reporter!.initialDisplay = true
+            reporter!.parentSpanId = spanId
+            reporter!.didSetProps(["initialDisplay", "parentSpanId"])
+            weakReporter = reporter
+        }
+
+        XCTAssertNil(weakReporter, "RNSentryOnDrawReporterView leaked due to a retain cycle")
+    }
 }

packages/core/ios/RNSentryOnDrawReporter.m

@@ -40,23 +40,29 @@ - (instancetype)init
 
 - (RNSentryEmitNewFrameEvent)createEmitNewFrameEvent
 {
+    __weak __typeof__(self) weakSelf = self;
     return ^(NSNumber *newFrameTimestampInSeconds) {
-        self->isListening = NO;
+        __strong __typeof__(weakSelf) strongSelf = weakSelf;
+        if (strongSelf == nil) {
+            return;
+        }
+
+        strongSelf->isListening = NO;
 
-        if (![_parentSpanId isKindOfClass:[NSString class]]) {
+        if (![strongSelf->_parentSpanId isKindOfClass:[NSString class]]) {
             return;
         }
 
-        if (self->_fullDisplay) {
+        if (strongSelf->_fullDisplay) {
             [RNSentryTimeToDisplay
-                putTimeToDisplayFor:[@"ttfd-" stringByAppendingString:self->_parentSpanId]
+                putTimeToDisplayFor:[@"ttfd-" stringByAppendingString:strongSelf->_parentSpanId]
                               value:newFrameTimestampInSeconds];
             return;
         }
 
-        if (self->_initialDisplay) {
+        if (strongSelf->_initialDisplay) {
             [RNSentryTimeToDisplay
-                putTimeToDisplayFor:[@"ttid-" stringByAppendingString:self->_parentSpanId]
+                putTimeToDisplayFor:[@"ttid-" stringByAppendingString:strongSelf->_parentSpanId]
                               value:newFrameTimestampInSeconds];
             return;
         }