MethodIntegrationQuestion.m

// How to integrate such two or more methods?

- (NSString *)string:(NSString*)string withoutMatches:(NSArray*)matches
{
    NSMutableString *workString = [string mutableCopy];
    
    // 逆順にしないと複数マッチの時に場所がずれる
    [matches enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(NSTextCheckingResult* match, NSUInteger idx, BOOL *stop) {
        [workString deleteCharactersInRange:match.range];
    }];
    
    return [workString copy];
}

- (NSString *)string:(NSString*)string replaceMatches:(NSArray*)matches withReplaceString:(NSString*)replaceString
{
    NSMutableString *workString = [string mutableCopy];
    
    // 逆順にしないと複数マッチの時に場所がずれる
    [matches enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(NSTextCheckingResult* match, NSUInteger idx, BOOL *stop) {
        [workString replaceCharactersInRange:match.range withString:string];
    }];
    
    return [workString copy];
}