Hpple使用Objective-C解析HTML [英] Hpple parsing HTML with Objective-C

问题描述

我遵循 RayWendErlich 的教程解析HTML节点。

我从 index.html 获取内容。
我尝试使用此方法获取背景值。

  + （void）parseWithHTMLString：（NSString *）string 
 {
 NSData * data = [string dataUsingEncoding：NSUTF8StringEncoding]; 
 TFHpple * parser = [TFHpple hppleWithData：data isXML：NO]; 
 
 NSString * XpathQueryString = @// div [class ='content'] / div / div; 
 NSArray * nodes = [parser searchWithXPathQuery：XpathQueryString]; 
 NSLog（@％@，nodes）; 
 
 NSMutableArray * resultArray = [[NSMutableArray alloc] initWithCapacity：0]; 
 for（TFHppleElement *节点中的元素）{
 Model * model = [[Model alloc] init]; 
 model.colorString = [element objectForKey：@style]; 
 [resultArray addObject：model]; 
 //NSLog(@\"%@\",model.colorString）; 
 
 
 
 
 
 
 
 所以问题是： 
 
 
 
我做错了什么？ 
 
解决方案
在您的代码中出现小错误。
 
 
您使用的xPath不正确。您在 class 前缺少 @ 。
 
 
 code> background  key是一个属性，所以你需要为 TFHppleElement 查询它的属性 property（它是一个字典），并通过 objectForKey：获取它的值。
 
 
这是最终的代码：
  NSArray * nodes = [parser searchWithXPathQuery：@// div [类= '内容'] / DIV / DIV]; 
 $ b $ for（TFHppleElement *节点中的元素）{
 NSLog（@％@，[element.attributes objectForKey：@style]）; 
 
 $ / code> 
控制台输出为： 
 
 
 
 
背景：＃D93D59 
 
背景：＃E7923D 
 
背景：＃768479 
 
背景：＃EBBA95 > 
背景：＃E26967 
 
背景：＃BF343F 
 
背景：＃254159 
 
背景：＃F2F2F2 
 
背景：＃D9A577 
 
背景：＃BF8969 
 
背景：＃04000D 
 
 ... 
 
 
 
I've follow the tutorial from RayWendErlich to parse HTML node. 


I get the content from an index.html.
I've try to use this method to fetch the background value.
+ (void)parseWithHTMLString:(NSString *)string
{
  NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
  TFHpple *parser = [TFHpple hppleWithData:data isXML:NO];

  NSString *XpathQueryString = @"//div[class='content']/div/div";
  NSArray *nodes = [parser searchWithXPathQuery:XpathQueryString];
  NSLog(@"%@",nodes);

  NSMutableArray *resultArray = [[NSMutableArray alloc] initWithCapacity:0];
  for (TFHppleElement *element in nodes) {
    Model *model = [[Model alloc] init];
    model.colorString = [element objectForKey:@"style"];
    [resultArray addObject:model];
    //NSLog(@"%@",model.colorString);
  }
}
So the question is:

What I had done wrong?
解决方案
There are 2 small errors in your code.

The xPath you used is not correct. You're missing an @ in front of class.
The background key is an attribute, so you need to ask the TFHppleElement for its attributes property (which is a dictionary) and get its value via objectForKey:.
This is the final code:
NSArray *nodes = [parser searchWithXPathQuery:@"//div[@class='content']/div/div"];

for (TFHppleElement *element in nodes) {
    NSLog(@"%@",[element.attributes objectForKey:@"style"]);
}
The console output is:

  
background: #D93D59

  background: #E7923D

  background: #768479

  background: #EBBA95

  background: #E26967

  background: #BF343F

  background: #254159

  background: #F2F2F2

  background: #D9A577

  background: #BF8969

  background: #04000D

  ...


                        
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