Fix iOS clipboard listener events#296
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RNCClipboard overrode addListener/removeListeners with no-op stubs, which prevents RCTEventEmitter from tracking listener count and starting observation. Delegate both methods to the superclass so Clipboard.addListener works on iOS.
mosoakinyemi
approved these changes
Apr 20, 2026
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| RCT_EXPORT_METHOD(addListener : (NSString *)eventName) { | ||
| // Keep: Required for RN built in Event Emitter Calls. | ||
| [super addListener:eventName]; |
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Nice fix 🙌
Tested this PR locally, and the clipboard listener works as expected 🚀
| RCT_EXPORT_METHOD(removeListeners : (double)count) { | ||
| // Keep: Required for RN built in Event Emitter Calls. | ||
| [super removeListeners:count]; | ||
| } |
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[nit] - removeListeners should take NSInteger (not double) to match RCTEventEmitter signature
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@mosoakinyemi
I looked into this and I don't think that's quite right — RCTEventEmitter itself declares removeListeners:(double)count, so the current iOS implementation matches the RN base class:
https://github.com/facebook/react-native/blob/main/packages/react-native/React/Modules/RCTEventEmitter.h
RN keeps the internal listener count as NSInteger, but the public method signature is double.
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Overview
I noticed that
Clipboard.addListenerdoes not fire on iOS.The root cause is that RNCClipboard exports
addListener/removeListenersas no-op methods, which preventsRCTEventEmitterfrom tracking the listener count and callingstartObserving.As a result, clipboard change events are not delivered to JavaScript even though
UIPasteboardChangedNotificationis observed natively.This PR fixes the issue by delegating both exported methods to the superclass (
RCTEventEmitter) implementation so that listener tracking and observation lifecycle work as intended.Related issue: #231
Test Plan