NSRegularExpression iOS自带的正则表达式

原文  http://blog.csdn.net/hmt20130412/article/details/39553961

以前做验证邮箱,电话号码的时候通常用第三方的正则表达式或者NSPredicate(点这里查看以前的文章),在后期,苹果推出了自己的正则表达式来提供给开发者调用,很方便,功能也强大.

具体可以查看 官方文档 ,包括如何书写进行匹配的正则表达式例子,这里我就不多加详述了,因为本人看那一堆符号好烦.....只好直接求助于谷歌了,下面只给出几个常用的.

#define KPhoneRegex  @"\\d{3}-\\d{8}|\\d{3}-\\d{7}|\\d{4}-\\d{8}|\\d{4}-\\d{7}|1+[358]+\\d{9}|\\d{8}|\\d{7}"#define KWebRegex    @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)"#define KWebOtherRegex @"http+:[^\\s]*"#define KEmailRegex  @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"

/**   1. 返回所有匹配结果的集合(适合,从一段字符串中提取我们想要匹配的所有数据)   *  - (NSArray *)matchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;   2. 返回正确匹配的个数(通过等于0,来验证邮箱,电话什么的,代替NSPredicate)   *  - (NSUInteger)numberOfMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;   3. 返回第一个匹配的结果。注意，匹配的结果保存在  NSTextCheckingResult 类型中   *  - (NSTextCheckingResult *)firstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;   4. 返回第一个正确匹配结果字符串的NSRange   *  - (NSRange)rangeOfFirstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;   5. block方法   *  - (void)enumerateMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range usingBlock:(void (^)(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop))block;   */    /**   *  enum {   NSRegularExpressionCaseInsensitive = 1 << 0,   // 不区分大小写的   NSRegularExpressionAllowCommentsAndWhitespace  = 1 << 1,   // 忽略空格和# -   NSRegularExpressionIgnoreMetacharacters= 1 << 2,   // 整体化   NSRegularExpressionDotMatchesLineSeparators= 1 << 3,   // 匹配任何字符，包括行分隔符   NSRegularExpressionAnchorsMatchLines   = 1 << 4,   // 允许^和$在匹配的开始和结束行   NSRegularExpressionUseUnixLineSeparators   = 1 << 5,   // (查找范围为整个的话无效)   NSRegularExpressionUseUnicodeWordBoundaries= 1 << 6// (查找范围为整个的话无效)   };   typedef NSUInteger NSRegularExpressionOptions;   */    // 下面2个枚举貌似都没什么意义,除了在block方法中,一般情况下,直接给0吧  /**   *  enum {   NSMatchingReportProgress = 1 << 0,   NSMatchingReportCompletion   = 1 << 1,   NSMatchingAnchored   = 1 << 2,   NSMatchingWithTransparentBounds  = 1 << 3,   NSMatchingWithoutAnchoringBounds = 1 << 4   };   typedef NSUInteger NSMatchingOptions;   */    /** 此枚举值只在5.block方法中用到   *  enum {   NSMatchingProgress   = 1 << 0,   NSMatchingCompleted  = 1 << 1,   NSMatchingHitEnd = 1 << 2,   NSMatchingRequiredEnd= 1 << 3,   NSMatchingInternalError  = 1 << 4   };   typedef NSUInteger NSMatchingFlags;   */    // 测试字符串，把里面的电话号码解析出来  NSString *urlString = @"哈哈哈哈呵呵呵s15279107723在这里啊啊啊啊s15279107716";  NSError *error = NULL;  // 根据匹配条件,创建了一个正则表达式(类方法,实例方法类似)  NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:KPhoneRegex options:NSRegularExpressionCaseInsensitive error:&error];  if (regex != nil) {    // 3.....    NSTextCheckingResult *firstMatch = [regex firstMatchInString:urlString                               options:0                              range:NSMakeRange(0, [urlString length])];    if (firstMatch) {      NSRange resultRange = [firstMatch rangeAtIndex:0];      //从urlString中截取数据      NSString *result = [urlString substringWithRange:resultRange];      NSLog(@"result = %@",result);    }    // 2.....    NSUInteger number = [regex numberOfMatchesInString:urlString                           options:0                           range:NSMakeRange(0, [urlString length])];    NSLog(@"number = %ld",number);    // 5.....(坑爹的返回第一个匹配结果)    [regex enumerateMatchesInString:urlString options:0 range:NSMakeRange(0, [urlString length]) usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {      NSLog(@"---%@",NSStringFromRange([result range]));      if (flags != NSMatchingInternalError) {        NSRange firstHalfRange = [result rangeAtIndex:0];        if (firstHalfRange.length > 0) {          NSString *resultString1 = [urlString substringWithRange:firstHalfRange];          NSLog(@"result1 = %@",resultString1);        }      }      *stop = YES;    }];  }    // 替换掉你要匹配的字符串  NSString *reString = [regex stringByReplacingMatchesInString:urlString                            options:0                            range:NSMakeRange(0, [urlString length])                            withTemplate:@"(我就是替换的值)"];  NSLog(@"reString = %@",reString);  // 还有2个方法大家可以去尝试看看      // 1.  NSMutableArray *oneArray = [self _matchLinkWithStr:urlString withMatchStr:KPhoneRegex];  for (NSString *phone in oneArray) {    NSLog(@"phone = %@",phone);  }

// 1.....- (NSMutableArray *)_matchLinkWithStr:(NSString *)str withMatchStr:(NSString *)matchRegex;{  NSError *error = NULL;  NSRegularExpression *reg = [NSRegularExpression regularExpressionWithPattern:matchRegex                                     options:NSRegularExpressionCaseInsensitive                                       error:&error];  NSArray *match = [reg matchesInString:str                  options:NSMatchingReportCompletion                  range:NSMakeRange(0, [str length])];    NSMutableArray *rangeArr = [NSMutableArray array];  // 取得所有的NSRange对象  if(match.count != 0)  {    for (NSTextCheckingResult *matc in match)    {      NSRange range = [matc range];      NSValue *value = [NSValue valueWithRange:range];      [rangeArr addObject:value];    }  }  // 将要匹配的值取出来,存入数组当中  __block NSMutableArray *mulArr = [NSMutableArray array];  [rangeArr enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {    NSValue *value = (NSValue *)obj;    NSRange range = [value rangeValue];    [mulArr addObject:[str substringWithRange:range]];  }];  return mulArr;}

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