iOS json解析中包含“ ”等解析出错

文题算是解决了，把特殊字符替换一下：
-(NSString *)JSONString:(NSString *)aString {
    NSMutableString *s = [NSMutableString stringWithString:aString];
    //[s replaceOccurrencesOfString:@""" withString:@"\"" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    //[s replaceOccurrencesOfString:@"/" withString:@"\/" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@" " withString:@"\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"" withString:@"\b" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"f" withString:@"\f" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@" " withString:@"\r" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@" " withString:@"\t" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    return [NSString stringWithString:s];
}