替换服务器获取的JSON数据中的换行符

JSON是不能解析带有换行符字符串的，今天被这傻问题碰到了，服务器获取的json字符串数据有换行符，怎么转json都是null。。。

而且有些不能直接用stringByReplacingOccurrencesOfString就能替换。还是用NSScanner好用

+(NSString *)ReplacingNewLineAndWhitespaceCharactersFromJson:(NSString *)dataStr{
    NSScanner *scanner = [[NSScanner alloc] initWithString:dataStr];
    [scanner setCharactersToBeSkipped:nil];
    NSMutableString *result = [[NSMutableString alloc] init];
    
    NSString *temp;
    NSCharacterSet*newLineAndWhitespaceCharacters = [ NSCharacterSet newlineCharacterSet];
    // 扫描
    while (![scanner isAtEnd])
    {
        temp = nil;
        [scanner scanUpToCharactersFromSet:newLineAndWhitespaceCharacters intoString:&temp];
        if (temp) [result appendString:temp];
        
        // 替换换行符
        if ([scanner scanCharactersFromSet:newLineAndWhitespaceCharacters intoString:NULL]) {
            if (result.length > 0 && ![scanner isAtEnd]) // Dont append space to beginning or end of result
                [result appendString:@"|"];
        }
    }
    return result;
}