IOS中NSPredicate和NSRegularExpression校验正则表达式区别

//NSString+RegEx.h#import <Foundation/Foundation.h>@interface NSString (RegEx)#pragma mark - NSPredicate- (BOOL)mars_matchedByPrdicateToRegEx:(NSString *)regEx;@end//NSString+RegEx.m#import "NSString+RegEx.h"@implementation NSString (RegEx)#pragma mark - NSPredicate- (BOOL)mars_matchedByPrdicateToRegEx:(NSString *)regEx{  NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regEx];  return [predicate evaluateWithObject:self];}@end

//NSString+RegEx.h#import <Foundation/Foundation.h>@interface NSString (RegEx)#pragma mark - NSRegularExpression//校验是否匹配- (BOOL)mars_matchedToRegEx:(NSString *)regEx;//匹配到的第一个字符串- (NSString *)mars_firstMatchToRegEx:(NSString *)regEx;//所有匹配的字符串- (NSArray *)mars_matchesToRegEx:(NSString *)regEx;//替换匹配到的字符串- (NSString *)mars_stringByReplaceMatchesToRegEx:(NSString *)regEx replaceString:(NSString *)replaceString;@end//NSString+RegEx.m#import "NSString+RegEx.h"@implementation NSString (RegEx)#pragma mark - NSRegualrExpression//校验是否匹配- (BOOL)mars_matchedToRegEx:(NSString *)regEx{    NSError *error;  NSRegularExpression *regularExpression = [NSRegularExpression regularExpressionWithPattern:regEx options:NSRegularExpressionCaseInsensitive error:&error];    NSUInteger number = [regularExpression numberOfMatchesInString:self options:0 range:NSMakeRange(0, self.length)];  return number != 0;}//匹配到的第一个字符串- (NSString *)mars_firstMatchToRegEx:(NSString *)regEx{  NSError *error;  NSRegularExpression *regularExpression = [NSRegularExpression regularExpressionWithPattern:regEx options:NSRegularExpressionCaseInsensitive error:&error];  NSTextCheckingResult *firstMatch = [regularExpression firstMatchInString:self options:0 range:NSMakeRange(0, self.length)];  if (firstMatch) {    NSString *result = [self substringWithRange:firstMatch.range];    return result;  }  return nil;}//所有匹配的字符串- (NSArray *)mars_matchesToRegEx:(NSString *)regEx{  NSError *error;  NSRegularExpression *regularExpression = [NSRegularExpression regularExpressionWithPattern:regEx options:NSRegularExpressionCaseInsensitive error:&error];    NSArray *matchArray = [regularExpression matchesInString:self options:0 range:NSMakeRange(0, self.length)];    NSMutableArray *array = [NSMutableArray array];  if (matchArray.count != 0) {    for (NSTextCheckingResult *match in matchArray) {      NSString *result = [self substringWithRange:match.range];      [array addObject:result];    }  }    return array;}//替换匹配到的字符串- (NSString *)mars_stringByReplaceMatchesToRegEx:(NSString *)regEx replaceString:(NSString *)replaceString{  NSError *error;  NSRegularExpression *regularExpression = [NSRegularExpression regularExpressionWithPattern:regEx options:NSRegularExpressionCaseInsensitive error:&error];  return [regularExpression stringByReplacingMatchesInString:self options:0 range:NSMakeRange(0, self.length) withTemplate:replaceString];}@end