以下代码适用于我，

NSString *stmt = @"waited";
NSRange stringRange = NSMakeRange(0, stmt.length);
NSDictionary* languageMap = @{@"Latn" : @[@"en"]};
[stmt enumerateLinguisticTagsInRange:stringRange
                                       scheme:NSLinguisticTagSchemeLemma
                                      options:NSLinguisticTaggerOmitWhitespace
                                  orthography:[NSOrthography orthographyWithDominantScript:@"Latn" languageMap:languageMap]
                                   usingBlock:^(NSString *tag, NSRange tokenRange, NSRange sentenceRange, BOOL *stop) {
                                       // Log info to console for debugging purposes
                                       NSString *currentEntity = [stmt substringWithRange:tokenRange];
                                       NSLog(@"%@ is a %@, tokenRange (%d,%d)",currentEntity,tag,tokenRange.length,tokenRange.location);
                                   }];