如何使用StringTokenizer获取一系列句子?

时间:2011-07-29 18:52:08

标签: cocoa nsstring cfstring

我已经创建了一个像这样的字符串标记器:

stringTokenizer = CFStringTokenizerCreate(
                         NULL
                         , (CFStringRef)str
                         , CFRangeMake(0, [str length])
                         , kCFStringTokenizerUnitSentence
                         , userLocale);

但是如何从tokenizer中获取这些句子呢? CF字符串编程指南未提及CFStringTokenizer或令牌(在PDF中进行了全文搜索)。

2 个答案:

答案 0 :(得分:16)

以下是CFStringTokenizer用法的示例:

CFStringRef string; // Get string from somewhere
CFLocaleRef locale = CFLocaleCopyCurrent();

CFStringTokenizerRef tokenizer = 
    CFStringTokenizerCreate(
        kCFAllocatorDefault
        , string
        , CFRangeMake(0, CFStringGetLength(string))
        , kCFStringTokenizerUnitSentence
        , locale);

CFStringTokenizerTokenType tokenType = kCFStringTokenizerTokenNone;
unsigned tokensFound = 0;

while(kCFStringTokenizerTokenNone !=
    (tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer))) {
    CFRange tokenRange = CFStringTokenizerGetCurrentTokenRange(tokenizer);
    CFStringRef tokenValue =
        CFStringCreateWithSubstring(
            kCFAllocatorDefault
            , string
            , tokenRange);

  // Do something with the token
  CFShow(tokenValue);
  CFRelease(tokenValue);
  ++tokensFound;
}

// Clean up
CFRelease(tokenizer);
CFRelease(locale);

答案 1 :(得分:0)

您也可以使用:

    [mutstri enumerateSubstringsInRange:NSMakeRange(0, [mutstri length])
                                options:NSStringEnumerationBySentences
                             usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop){

                                 NSLog(@"%@", substring);

                             }];