iOS分词

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最近锤子科技发布新手机，手机推出重大功能分词（Big Bang），其实 iOS 拥有分词的 API，代码如下

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- (NSArray *)stringTokenizerWithWord:(NSString *)word {
    NSMutableArray *keyWords = [NSMutableArray new];
    CFStringTokenizerRef ref = CFStringTokenizerCreate(NULL, (__bridge CFStringRef)word, CFRangeMake(0, word.length),kCFStringTokenizerUnitWord,NULL);
    CFRange range;
    NSString *keyWord;
    do {
        CFStringTokenizerAdvanceToNextToken(ref);
        range = CFStringTokenizerGetCurrentTokenRange(ref);
        if (range.length == 0) break;
        keyWord = [word substringWithRange:NSMakeRange(range.location, range.length)];
        [keyWords addObject:keyWord];
    } while (range.length > 0); 
    return keyWords;
}