I found that your previous version contained the sorting API, but it was wrong. I have corrected it for you. Now I can't find this api.

[CodeSlaveZhang]

• (void)sortWithValuesUsingComparator:(NSComparator NS_NOESCAPE)cmptr{
  //[self.readWriteLock lock];
  NSArray *valuesBefore = _mutableValues.copy;
  NSArray *keysBefore = _mutableKeys.copy;
  [_mutableValues sortUsingComparator:cmptr];
  [_mutableKeys sortUsingComparator:^NSComparisonResult(id _Nonnull key1, id _Nonnull key2) {
  ///find the obj before sort operation with key
  NSInteger keyIndexBefore1 = [keysBefore indexOfObject:key1];
  id obj1 = valuesBefore[keyIndexBefore1];
  NSInteger keyIndexBefore2 = [keysBefore indexOfObject:key2];
  id obj2 = valuesBefore[keyIndexBefore2];
  ///find the objct index in sorted values
  NSInteger index1 = [_mutableValues indexOfObject:obj1];;
  NSInteger index2 = [_mutableValues indexOfObject:obj2];;
  return index2<index1;
  }];
  //[self.readWriteLock unlock];
  }