：
xxxxxx[a:b]xxxxxx
：
xxxxxxaxxxxxx
：
xxxxxxbxxxxxx

：
：
3 [666: ]

：
3 666

：
3

：
：@"\[.?\]"
：@"\[.?\:"
: @"\:.*?\]"
[] :

---
#####.h  

// Copyright © 2016 XDYB. All rights reserved.
//

import

@interface PatternString : NSObject

/**
*
* ： [666: ] ， 666，
*/
+(NSMutableArray *)PatternString:(NSString *)string;

/**
* ：
* ：
* ：
* ：
*/

• (NSMutableArray *)matchesInStringAllFit:(NSString *)string entirePattern:(NSString *)entirePattern firstPattern:(NSString *)firstPattern lastPattern:(NSString *)lastPattern;

/**
*
*/

• (BOOL)isPatternString:(NSString *)string;

/**
*
*/

• (BOOL)formerlyString:(NSString *)string regularExpressionWithPattern:(NSString *)pattern;

@end

#####.m  

// Copyright © 2016 XDYB. All rights reserved.
//

import "PatternString.h"

@implementation PatternString

//
+(NSMutableArray )PatternString:(NSString )string
{
NSMutableArray array = [PatternString matchesInStringAllFit:string entirePattern:@"\[.?\]" firstPattern:@"\[.?\:" lastPattern:@"\:.?\]"];
return array;
}

// ，

• (BOOL)isPatternString:(NSString )string
  {
  return [self formerlyString:string regularExpressionWithPattern:@"\[.?\]"];
  }

// ，

• (BOOL)formerlyString:(NSString *)string regularExpressionWithPattern:(NSString *)pattern{

  NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:nil];
  //
  NSArray *arr = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
  return arr.count;
  }

//

• (NSMutableArray *)matchesInStringAllFit:(NSString *)string entirePattern:(NSString *)entirePattern firstPattern:(NSString *)firstPattern lastPattern:(NSString *)lastPattern
  {

  //
  NSRange rangeStr;

  //
  NSTextCheckingResult * rsult;

  //
  NSMutableArray *array = [NSMutableArray arrayWithObject:string];
  [array addObject:string];

  //
  //
  NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:entirePattern options:NSRegularExpressionCaseInsensitive error:nil];

  //
  NSArray *arr = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
  //
  NSUInteger count = arr.count;
  int i = 2;

  while (i > 0) {
  i = i- 1;

    while (count > 0) {
        //      
        rsult =  arr[--count];
        rangeStr  = rsult.range;
        NSArray *arrayFirst =  [self matchesInString:array.firstObject entirePattern:entirePattern firstPattern:firstPattern lastPattern:lastPattern];
        [array replaceObjectAtIndex:0 withObject:arrayFirst.firstObject];
        
        NSArray *arrayLast =  [self matchesInString:array.lastObject entirePattern:entirePattern firstPattern:firstPattern lastPattern:lastPattern];
        [array replaceObjectAtIndex:1 withObject:arrayLast.lastObject];
    }
  

  }

  return array;
  }

//

• (NSArray *)matchesInString:(NSString *)string entirePattern:(NSString *)entirePattern firstPattern:(NSString *)firstPattern lastPattern:(NSString *)lastPattern
  {

  //
  // 1 ------[]-------
  // NSString pattern1 = @"\[.?\]";
  NSString *pattern1 = entirePattern;
  NSString *pattern1String = [self matchesInString:string regularExpressionWithPattern:entirePattern];
  // 2 ------[:-------
  // NSString pattern2 = @"\[.?\:";
  NSString *pattern2String = [self matchesInString:pattern1String regularExpressionWithPattern:firstPattern];
  // 3 ------:]-------
  // NSString pattern3 = @"\:.?\]";
  NSString *pattern3String = [self matchesInString:pattern1String regularExpressionWithPattern:lastPattern];

//    1
NSString *patternHeadStr = [self stringByReplacingString:pattern2String withReplacingFirstPatternString:@"" withReplacingLastPatternString:@""];
//    2
NSString *patternTailStr = [self stringByReplacingString:pattern3String withReplacingFirstPatternString:@"" withReplacingLastPatternString:@""];

if(patternHeadStr == nil || patternTailStr == nil)//         :     
{
    return @[string,string];
}

//    
NSString *finallyHeadString =  [self matchesInString:string regularExpressionWithPattern:pattern1 stringByReplacingOccurrencesWithString:patternHeadStr];

NSString *finallyTailString =  [self matchesInString:string regularExpressionWithPattern:pattern1 stringByReplacingOccurrencesWithString:patternTailStr];

return @[finallyHeadString,finallyTailString];

}

//

• (NSString *)stringByReplacingString:(NSString *)str withReplacingFirstPatternString:(NSString *)firstReplacement withReplacingLastPatternString:(NSString *)lastReplacement
  {
  NSRange range = NSMakeRange(0, 1);
  str = [str stringByReplacingCharactersInRange:range withString:firstReplacement];
  NSRange range1 = NSMakeRange(str.length - 1, 1);
  str = [str stringByReplacingCharactersInRange:range1 withString:lastReplacement];
  return str;
  }

//

• (NSString *)matchesInString:(NSString *)string regularExpressionWithPattern:pattern
  {
  //
  NSRange rangeStr;

  //
  NSString *matchesInStr;

  //
  NSTextCheckingResult * rsult;
  //
  //
  NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:nil];
  //
  NSArray *arr = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
  //
  NSUInteger count = arr.count;
  while (count > 0) {
  //
  rsult = arr[--count];
  rangeStr = rsult.range;
  //
  matchesInStr = [string substringWithRange:rangeStr];;
  }

  return matchesInStr;
  }

//

• (NSString *)matchesInString:(NSString *)string regularExpressionWithPattern:(NSString *)pattern stringByReplacingOccurrencesWithString:(NSString *)replacement
  {

  NSString *replacingStr;

  //
  NSRange rangeStr;

  //
  NSString *matchesInStr;

  //
  NSTextCheckingResult * rsult;

  //
  //
  NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:nil];
  //
  NSArray *arr = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];

  //
  NSUInteger count = arr.count;
  while (count > 0) {
  //
  rsult = arr[--count];
  rangeStr = rsult.range;
  //
  matchesInStr = [string substringWithRange:rangeStr];
  // X
  replacingStr = [string stringByReplacingOccurrencesOfString:matchesInStr withString:replacement];
  }

  return replacingStr;
  }
  @end