diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index b909c0944bd..a4a0ddb3246 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -255,7 +255,7 @@
                             errorHandler:errorHandler];
 }
 
-- (void)didFinishWithError:(NSError *)errorOrNil {
+- (void)writesFinishedWithError:(NSError *)errorOrNil {
   if (errorOrNil) {
     [self cancel];
   } else {
@@ -306,7 +306,7 @@
 
 - (void)startWithWriteable:(id<GRXWriteable>)writeable {
   // The following produces a retain cycle self:_responseWriteable:self, which is only
-  // broken when didFinishWithError: is sent to the wrapped writeable.
+  // broken when writesFinishedWithError: is sent to the wrapped writeable.
   // Care is taken not to retain self strongly in any of the blocks used in
   // the implementation of GRPCCall, so that the life of the instance is
   // determined by this retain cycle.
diff --git a/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.h b/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.h
index 6103d4829d5..1ef245fe37b 100644
--- a/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.h
+++ b/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.h
@@ -38,11 +38,11 @@
 
 // This is a thread-safe wrapper over a GRXWriteable instance. It lets one
 // enqueue calls to a GRXWriteable instance for the main thread, guaranteeing
-// that didFinishWithError: is the last message sent to it (no matter what
+// that writesFinishedWithError: is the last message sent to it (no matter what
 // messages are sent to the wrapper, in what order, nor from which thread). It
 // also guarantees that, if cancelWithError: is called from the main thread
 // (e.g. by the app cancelling the writes), no further messages are sent to the
-// writeable except didFinishWithError:.
+// writeable except writesFinishedWithError:.
 //
 // TODO(jcanizales): Let the user specify another queue for the writeable
 // callbacks.
@@ -51,7 +51,7 @@
 
 // The GRXWriteable passed is the wrapped writeable.
 // Both the GRXWriter instance and the GRXWriteable instance are retained until
-// didFinishWithError: is sent to the writeable, and released after that.
+// writesFinishedWithError: is sent to the writeable, and released after that.
 // This is used to create a retain cycle that keeps both objects alive until the
 // writing is explicitly finished.
 - (instancetype)initWithWriteable:(id<GRXWriteable>)writeable writer:(id<GRXWriter>)writer
@@ -61,12 +61,12 @@
 // The passed handler is invoked from the main thread after writeValue: returns.
 - (void)enqueueMessage:(NSData *)message completionHandler:(void (^)())handler;
 
-// Enqueues didFinishWithError:nil to be sent to the writeable in the main
+// Enqueues writesFinishedWithError:nil to be sent to the writeable in the main
 // thread. After that message is sent to the writeable, all other methods of
 // this object are effectively noops.
 - (void)enqueueSuccessfulCompletion;
 
-// If the writeable has not yet received a didFinishWithError: message, this
+// If the writeable has not yet received a writesFinishedWithError: message, this
 // will enqueue one to be sent to it in the main thread, and cancel all other
 // pending messages to the writeable enqueued by this object (both past and
 // future).
@@ -74,7 +74,7 @@
 - (void)cancelWithError:(NSError *)error;
 
 // Cancels all pending messages to the writeable enqueued by this object (both
-// past and future). Because the writeable won't receive didFinishWithError:,
+// past and future). Because the writeable won't receive writesFinishedWithError:,
 // this also releases the writeable and the writer.
 - (void)cancelSilently;
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.m b/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.m
index b8f206ad234..7d5ecb56d9a 100644
--- a/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.m
+++ b/src/objective-c/GRPCClient/private/GRPCDelegateWrapper.m
@@ -43,7 +43,7 @@
 
 @implementation GRPCDelegateWrapper {
   dispatch_queue_t _writeableQueue;
-  // This ensures that didFinishWithError: is only sent once to the writeable.
+  // This ensures that writesFinishedWithError: is only sent once to the writeable.
   dispatch_once_t _alreadyFinished;
 }
 
@@ -80,7 +80,7 @@
     dispatch_once(&_alreadyFinished, ^{
       // Cancellation is now impossible. None of the other three blocks can run
       // concurrently with this one.
-      [self.writeable didFinishWithError:nil];
+      [self.writeable writesFinishedWithError:nil];
       // Break the retain cycle with writer, and skip any possible message to the
       // wrapped writeable enqueued after this one.
       self.writeable = nil;
@@ -100,7 +100,7 @@
     self.writeable = nil;
 
     dispatch_async(_writeableQueue, ^{
-      [writeable didFinishWithError:error];
+      [writeable writesFinishedWithError:error];
       // Break the retain cycle with writer.
       self.writer = nil;
     });
diff --git a/src/objective-c/ProtoRPC/ProtoRPC.m b/src/objective-c/ProtoRPC/ProtoRPC.m
index e4bc48a69f6..96608f28989 100644
--- a/src/objective-c/ProtoRPC/ProtoRPC.m
+++ b/src/objective-c/ProtoRPC/ProtoRPC.m
@@ -73,7 +73,7 @@
     _responseWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
       [responsesWriteable writeValue:[responseClass parseFromData:value]];
     } completionHandler:^(NSError *errorOrNil) {
-      [responsesWriteable didFinishWithError:errorOrNil];
+      [responsesWriteable writesFinishedWithError:errorOrNil];
     }];
   }
   return self;
diff --git a/src/objective-c/RxLibrary/GRXBufferedPipe.h b/src/objective-c/RxLibrary/GRXBufferedPipe.h
index 86d12853b0e..68a1695a4b1 100644
--- a/src/objective-c/RxLibrary/GRXBufferedPipe.h
+++ b/src/objective-c/RxLibrary/GRXBufferedPipe.h
@@ -43,7 +43,7 @@
 // If it is throttled and keeps receiving values, as well as if it receives values before being
 // started, it will buffer them and propagate them in order as soon as its state becomes
 // GRXWriterStateStarted.
-// If it receives an error (via -didFinishWithError:), it will drop any buffered values and
+// If it receives an error (via -writesFinishedWithError:), it will drop any buffered values and
 // propagate the error immediately.
 @interface GRXBufferedPipe : NSObject<GRXWriteable, GRXWriter>
 
diff --git a/src/objective-c/RxLibrary/GRXBufferedPipe.m b/src/objective-c/RxLibrary/GRXBufferedPipe.m
index 0230f14c36f..e14e15df705 100644
--- a/src/objective-c/RxLibrary/GRXBufferedPipe.m
+++ b/src/objective-c/RxLibrary/GRXBufferedPipe.m
@@ -88,7 +88,7 @@
   }
 }
 
-- (void)didFinishWithError:(NSError *)errorOrNil {
+- (void)writesFinishedWithError:(NSError *)errorOrNil {
   _inputIsFinished = YES;
   _errorOrNil = errorOrNil;
   if (errorOrNil || self.shouldFastForward) {
@@ -136,7 +136,7 @@
 - (void)finishWithError:(NSError *)errorOrNil {
   id<GRXWriteable> writeable = _writeable;
   self.state = GRXWriterStateFinished;
-  [writeable didFinishWithError:errorOrNil];
+  [writeable writesFinishedWithError:errorOrNil];
 }
 
 @end
diff --git a/src/objective-c/RxLibrary/GRXImmediateWriter.m b/src/objective-c/RxLibrary/GRXImmediateWriter.m
index 7108a565846..0b4979872e2 100644
--- a/src/objective-c/RxLibrary/GRXImmediateWriter.m
+++ b/src/objective-c/RxLibrary/GRXImmediateWriter.m
@@ -130,7 +130,7 @@
   _errorOrNil = nil;
   id<GRXWriteable> writeable = _writeable;
   _writeable = nil;
-  [writeable didFinishWithError:errorOrNil];
+  [writeable writesFinishedWithError:errorOrNil];
 }
 
 - (void)setState:(GRXWriterState)newState {
diff --git a/src/objective-c/RxLibrary/GRXWriteable.h b/src/objective-c/RxLibrary/GRXWriteable.h
index d1bcb51799f..216de30735b 100644
--- a/src/objective-c/RxLibrary/GRXWriteable.h
+++ b/src/objective-c/RxLibrary/GRXWriteable.h
@@ -43,8 +43,7 @@
 // Signal that the sequence is completed, or that an error ocurred. After this
 // message is sent to the instance, neither it nor writeValue: may be
 // called again.
-// TODO(jcanizales): enumerator:(id<GRXEnumerator>) didFinishWithError:(NSError*)?
-- (void)didFinishWithError:(NSError *)errorOrNil;
+- (void)writesFinishedWithError:(NSError *)errorOrNil;
 @end
 
 typedef void (^GRXValueHandler)(id value);
diff --git a/src/objective-c/RxLibrary/GRXWriteable.m b/src/objective-c/RxLibrary/GRXWriteable.m
index d3ee7fa1707..63f7c3e7f32 100644
--- a/src/objective-c/RxLibrary/GRXWriteable.m
+++ b/src/objective-c/RxLibrary/GRXWriteable.m
@@ -82,7 +82,7 @@
   }
 }
 
-- (void)didFinishWithError:(NSError *)errorOrNil {
+- (void)writesFinishedWithError:(NSError *)errorOrNil {
   if (_completionHandler) {
     _completionHandler(errorOrNil);
   }
diff --git a/src/objective-c/RxLibrary/GRXWriter.h b/src/objective-c/RxLibrary/GRXWriter.h
index 68c294f0073..dcf44e31433 100644
--- a/src/objective-c/RxLibrary/GRXWriter.h
+++ b/src/objective-c/RxLibrary/GRXWriter.h
@@ -50,7 +50,7 @@ typedef NS_ENUM(NSInteger, GRXWriterState) {
   // The writer is temporarily paused, and won't send any more values to the
   // writeable unless its state is set back to Started. The writer might still
   // transition to the Finished state at any moment, and is allowed to send
-  // didFinishWithError: to its writeable.
+  // writesFinishedWithError: to its writeable.
   //
   // Not all implementations of writer have to support pausing, and thus
   // trying to set an writer's state to this value might have no effect.
@@ -59,7 +59,7 @@ typedef NS_ENUM(NSInteger, GRXWriterState) {
   // The writer has released its writeable and won't interact with it anymore.
   //
   // One seldomly wants to set an writer's state to this value, as its
-  // writeable isn't notified with a didFinishWithError: message. Instead, sending
+  // writeable isn't notified with a writesFinishedWithError: message. Instead, sending
   // finishWithError: to the writer will make it notify the writeable and then
   // transition to this state.
   GRXWriterStateFinished
@@ -105,7 +105,7 @@ typedef NS_ENUM(NSInteger, GRXWriterState) {
 // This method might only be called on writers in the NotStarted state.
 - (void)startWithWriteable:(id<GRXWriteable>)writeable;
 
-// Send didFinishWithError:errorOrNil immediately to the writeable, and don't send
+// Send writesFinishedWithError:errorOrNil immediately to the writeable, and don't send
 // any more messages to it.
 //
 // This method might only be called on writers in the Started or Paused
diff --git a/src/objective-c/RxLibrary/GRXWriter.m b/src/objective-c/RxLibrary/GRXWriter.m
index 140284b9387..cc143835605 100644
--- a/src/objective-c/RxLibrary/GRXWriter.m
+++ b/src/objective-c/RxLibrary/GRXWriter.m
@@ -62,7 +62,7 @@
 - (void)finishOutputWithError:(NSError *)errorOrNil {
   id<GRXWriteable> writeable = _writeable;
   _writeable = nil;
-  [writeable didFinishWithError:errorOrNil];
+  [writeable writesFinishedWithError:errorOrNil];
 }
 
 // This is used to stop the input writer. It nillifies our reference to it
@@ -79,7 +79,7 @@
   [_writeable writeValue:value];
 }
 
-- (void)didFinishWithError:(NSError *)errorOrNil {
+- (void)writesFinishedWithError:(NSError *)errorOrNil {
   _writer = nil;
   [self finishOutputWithError:errorOrNil];
 }
diff --git a/src/objective-c/examples/Sample/SampleTests/RemoteProtoTests.m b/src/objective-c/examples/Sample/SampleTests/RemoteProtoTests.m
index 51965a1dd70..7e063fddb4e 100644
--- a/src/objective-c/examples/Sample/SampleTests/RemoteProtoTests.m
+++ b/src/objective-c/examples/Sample/SampleTests/RemoteProtoTests.m
@@ -227,7 +227,7 @@
                                                      requestedResponseSize:responses[index]];
         [requestsBuffer writeValue:request];
       } else {
-        [requestsBuffer didFinishWithError:nil];
+        [requestsBuffer writesFinishedWithError:nil];
       }
     }