Can't get data on detailviewcontroller with Hpple parsing - html

Question

I am a beginner in Obj-C and I try to make an app with this raywenderlich tutorial.
I parse html page with Title of articles (mininglife.ru) , also I getting an urls of each articles and keep it in an NSMutableArray for using it in my DetailviewController.
But when I try to pull urls off and put it in NSUrl nothing happens. I've tried a lot of ways, Can you help me with it and try to explain if I do something wrong. Thank you.
-(void)loadArticles{
Articlelist *urlOfArticle = [_objects objectAtIndex:self]; // from previous parsing
NSURL *articleUrl = [NSURL URLWithString:urlOfArticle.url];// I think this string is wrong, or?
NSData *htmlUrlsData = [NSData dataWithContentsOfURL:articleUrl];
TFHpple *articleParser = [TFHpple hppleWithHTMLData:htmlUrlsData];
NSString *articleNameXpath = #"/html/body/div[1]/div/div[1]/main/article/h1";
// NSString *articleContentXpath = #"//div[#class'entry-content']//p";
NSArray *articleNameNodes = [articleParser searchWithXPathQuery:articleNameXpath];
// NSArray *articleContentNodes = [articleParser searchWithXPathQuery:articleContentXpath];
NSMutableArray *newArticleArray = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in articleNameNodes) {
Article *newArticleName = [[Article alloc] init];
[newArticleArray addObject:newArticleName];
newArticleName.name = [[element firstChild] content];
}
_articleName = newArticleArray;
[self.tableView reloadData];
}

Answer 1

Change interface to this
#interface MasterViewController () {
NSMutableArray *_articles;
}
#end
Add this to MasterViewController
- (void)loadArticles
{
NSURL *articlesUrl = [NSURL URLWithString:#"http://mininglife.ru"];
NSData *articlesHtmlData = [NSData dataWithContentsOfURL:articlesUrl];
TFHpple *articlesParser = [TFHpple hppleWithHTMLData:articlesHtmlData];
NSString *articlesXpathQueryString = #"/html/body/div[1]/div/div[1]/main/article/h1";
NSArray *articlesNodes = [articlesParser searchWithXPathQuery:articlesXpathQueryString];
NSMutableArray *newArticles = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in articlesNodes) {
Article *article = [[Article alloc] init];
[newArticles addObject:article];
article.title = [[element firstChild] content];
article.url = [element objectForKey:#"href"];
}
_articles = newArticles;
[self.tableView reloadData];
}
Change DetailviewController.h's interface to
#class Article;
#interface DetailViewController : UIViewController
#property (strong, nonatomic) Article *article;
#property (strong, nonatomic) IBOutlet UILabel *detailDescriptionLabel;
#end
Change DetailViewController.m to
#import "DetailViewController.h"
#import "Article.h"
#import "TFHpple.h"
#implementation DetailViewController
#synthesize detailDescriptionLabel = _detailDescriptionLabel;
- (void)viewDidLoad
{
[super viewDidLoad];
[self loadArticle];
}
- (void)loadArticle
{
NSURL *articleUrl = [NSURL URLWithString:self.article.url];
NSData *articleHtmlData = [NSData dataWithContentsOfURL:articleUrl];
TFHpple *articleParser = [TFHpple hppleWithHTMLData:articleHtmlData];
NSString *articleXpathQueryString = #"//div[#class'entry-content']//p";
NSArray *articleNodes = [articleParser searchWithXPathQuery:articleXpathQueryString];
NSMutableArray *newArticleContents = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in articleNodes) {
[newArticleContents addObject:[[element firstChild] content]];
}
NSLog(#"%#", newArticleContents);
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Detail", #"Detail");
}
return self;
}
#end
Don't forget to change all call to loadTutorials to loadArticles in MasterViewController. PS: This example only prints the articles content to the console
Your xPath might be wrong as well