试了一下。基本上适合全部的检索结果。

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        //获取数据    NSURL *url=[NSURL URLWithString:@"http://s.g.wanfangdata.com.cn/Paper.aspx?q=hiv"];    NSURLRequest *request=[NSURLRequest requestWithURL:url];    NSData *data=[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];        //解析数据    TFHpple *hpple=[TFHpple hppleWithHTMLData:data];        //XPATH字符串 越短越好。可是要能过滤出符合要求的结果    //xpath教程:http://www.w3cschool.cn/index-14.html    NSString *xpathStr =@"//div/ul/li [@class='title_li']   /a [not(@class)]";//解析标题     NSString *xpathStr2 =@"//div/ul/li [@class='zi'] ";//解析简单介绍    NSArray *arr=[hpple searchWithXPathQuery:xpathStr];    NSArray *arr2=[hpple searchWithXPathQuery:xpathStr2];    //NSLog(@"%@",arr2);    //这个数组中就有须要的值       alltilte=[[NSMutableArray alloc]init];    alltext=[[NSMutableArray alloc]init];    alltilte = [self SaveArry:arr];    alltext = [self SaveAlltext:arr2];       for(int i=0;i
     "];        string = [string substringToIndex:range.location];                NSString  *temp =[string stringByReplacingOccurrencesOfString:@"
"                                                           withString:@""];        temp =[temp stringByReplacingOccurrencesOfString:@""                                              withString:@""];        temp =[temp stringByReplacingOccurrencesOfString:@""                                              withString:@""];        temp =[temp stringByReplacingOccurrencesOfString:@"
"                                              withString:@""];        [alltext addObject:temp];    }    return alltext;}-(NSMutableArray *)SaveArry: (NSArray *)_arry{        for (TFHppleElement *tmp in _arry)    {        NSString * string =[tmp raw];        NSRange range;        NSRange range2;        range = [string rangeOfString:@""];        string = [string substringToIndex:range.location];        NSString  *temp =[string stringByReplacingOccurrencesOfString:@"" withString:@""];        temp=[temp stringByReplacingOccurrencesOfString:@"" withString:@""];        range = [string rangeOfString:@">"];        range2 = [string rangeOfString:@"img"];        if(range.length!=0&&range2.length==0)        {            string = [temp substringFromIndex:range.location+1];           [alltilte addObject:string];        }            }        return alltilte;}