self.tableview reload not working after app connects to the internet - ios

I know that it has been many times stated this question but it seems i can't find a solution with my case. I have an application which has inside a view controller a container view controller which is a table view controller. In this table view are loaded some rss feeds. When i open my app with no internet connection my data are not appearing, but after i connect my app to the internet my table should be reloaded after i pull down the table, but it doesn't. I tried many things but i can't find a solution. I am posting my code so if anyone could help i would appreciate it. Thank you.
- (void)viewDidLoad {
[super viewDidLoad];
feeds = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:#"http://url"];
parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
[parser setDelegate:self];
[parser setShouldResolveExternalEntities:NO];
[parser parse];
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
self.tableView.dataSource = self;
self.tableView.delegate = self;
if (networkStatus == NotReachable)
{
number = 0;
}
else{
number = 1;
}
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
num = 5;
}
else{
num = feeds.count;
}}
These are my main methods for calling the table
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return number;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if(feeds.count > num){
return num + 1;
}
return num;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"title"];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.userInteractionEnabled = YES;
// Set up the cell
[cell.textLabel setFont:[UIFont fontWithName:#"Verdana" size:15]];
[cell.textLabel setNumberOfLines:2];
[cell.detailTextLabel setFont:[UIFont fontWithName:#"Verdana" size:12]];
cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"title"];
}
return cell;
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc] init];
title = [[NSMutableString alloc] init];
link = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[feeds addObject:[item copy]];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if ([element isEqualToString:#"title"]) {
[title appendString:string];
} else if ([element isEqualToString:#"link"]) {
[link appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
This is where i reload my data after pulling down
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
CGPoint targetPoint = *targetContentOffset;
CGPoint currentPoint = scrollView.contentOffset;
if (targetPoint.y > currentPoint.y) {
[self.tableView reloadData];
}}

Did you declare the class that implements scrollViewWillEndDragging as implementing UIScrollViewDelegate? Try putting a break point inside that event handler and see if your code is getting executed when you pull down the list.
EDIT: You are only updating the number variable when the view loads for the first time and you are initializing it to 0 whenever there is no internet present. Hence, you are never going to get any rows because there are no sections to display it from.

Related

NSXMLParser foundCharacters Thread 1: EXC_BAD_ACCESS (code=2, address=0x0)

I am trying to implement an rss reader into a table inside a container. I have the code of the parser in an other project and in the specific project it works fine without any error. I copied every file, 4 files exactly as they are in the other project and i copied also the view controllers into my storyboard so they are exactly the same. But when i run the code i get an error!
here is a pic with my error.
I don't know why is this happening. In the other project which has only two view controllers with the table view and the web view it works fine. But when i try to copy every file as it is into my other project I get this error.
This is my .m file
#import "APPMasterViewController.h"
#import "APPDetailViewController.h"
#interface APPMasterViewController () {
NSXMLParser *parser;
NSMutableArray *feeds;
NSMutableDictionary *item;
NSMutableString *title;
NSMutableString *link;
NSString *element;
}
#end
#implementation APPMasterViewController
(void)awakeFromNib {
[super awakeFromNib];
}
- (void)viewDidLoad {
[super viewDidLoad];
feeds = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:#"http://radioevros.gr/feed/"];
parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
[parser setDelegate:self];
[parser setShouldResolveExternalEntities:NO];
[parser parse];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return feeds.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"title"];
return cell;
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI: (NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc] init];
title = [[NSMutableString alloc] init];
link = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[feeds addObject:[item copy]];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if ([element isEqualToString:#"title"]) {
[title appendString:string];
} else if ([element isEqualToString:#"link"]) {
[link appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSString *string = [feeds[indexPath.row] objectForKey: #"link"];
[[segue destinationViewController] setUrl:string];
}
}
-(void) viewDidUnload{
[element release];
element = nil;
[super viewDidUnload];
}
- (void)dealloc {
[element release];
[super dealloc];
}
#end
I can't say for certain since I haven't tried running your code, but you may want to try to store element using element = [elementName copy]; instead and see if that gets rid of the exception.
My guess is that elementName gets deallocated after you exit the method since it is only a local parameter variable.
As a side note, it appears that you are doing manual memory management. I highly suggest that you convert your project to use ARC since it not only streamlines memory management, it is also what Apple has been recommending to use for quite a while now.

Why isn't my iOS refresh controller working? [duplicate]

This question already exists:
UIRefreshControl not refreshing xml data
Closed 9 years ago.
Can anyone explain why my pull to refresh isn't working? I've called the UIRefresh controller and the "pull to refresh" animation works but the table view doesn't reload the XML data. What am I doing wrong? Please help.
#import "MasterViewController.h"
#import "DetailViewController.h"
#interface MasterViewController () {
NSXMLParser *parser;
NSMutableArray *feeds;
NSMutableDictionary *item;
NSMutableString *title;
NSMutableString *link;
NSString *element;
}
#end
#implementation MasterViewController
- (void)awakeFromNib {
[super awakeFromNib];
}
// Paste Blog feed here
- (void)viewDidLoad {
[super viewDidLoad];
feeds = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:#"http://www.placeholder.xml"];
parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
[parser setDelegate:self];
[parser setShouldResolveExternalEntities:NO];
[parser parse];
UIRefreshControl *refreshControl = [UIRefreshControl new];
[refreshControl addTarget:self
action:#selector(refresh:)
forControlEvents:UIControlEventValueChanged];
refreshControl.attributedTitle =
[[NSAttributedString alloc] initWithString:#"Pull to refresh..."];
self.refreshControl = refreshControl;
}
- (void)refresh:(UIRefreshControl *)sender {
// ... your refresh code
NSURL *url = [NSURL URLWithString:#"http://www.placeholder.xml"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
(void)[[NSURLConnection alloc] initWithRequest:request delegate:self];
[sender endRefreshing];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
return feeds.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:#"Cell"
forIndexPath:indexPath];
cell.textLabel.text =
[[feeds objectAtIndex:indexPath.row] objectForKey:#"title"];
return cell;
}
- (void)parser:(NSXMLParser *)parser
didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict {
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc] init];
title = [[NSMutableString alloc] init];
link = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser
didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[feeds addObject:[item copy]];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if ([element isEqualToString:#"title"]) {
[title appendString:string];
} else if ([element isEqualToString:#"link"]) {
[link appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSString *string = [feeds[indexPath.row] objectForKey:#"link"];
[[segue destinationViewController] setUrl:string];
}
}
#end
The idea presented in the answer here should help: stackoverflow.com/a/16347259/1151545
Basically create ur UIRefreshControl then add it as a subview to any UIScrollView. FYI the UITableView is a subclass of UIScrollView

iOS - Enclosure URL being detected, but not shown for different items

I am currently trying to get images to be displayed in my Table View. But, it looks like when it gets the last image, it sets all of the images to that.
The image is from my first blog post.
Here's my code for the RSS detection:
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return feeds.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"title"];
NSString *textFiltered = [[feeds objectAtIndex:indexPath.row] objectForKey: #"description"];
cell.detailTextLabel.text = [textFiltered stringByConvertingHTMLToPlainText];
//cell.detailTextLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"pubDate"];
//NSString *imageURLString = [[feeds objectAtIndex:indexPath.row] objectForKey: #"enclosure"];
NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
cell.imageView.image = [UIImage imageWithData:imageData];
return cell;
}
#pragma mark - parsing of RssFeed Values
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc]init];
title = [[NSMutableString alloc]init];
link = [[NSMutableString alloc] init];
desc = [[NSMutableString alloc] init];
image = [[NSMutableString alloc] init];
pubDate = [[NSMutableString alloc] init];
feedEnclosure = [[NSMutableString alloc] init];
encodedContent = [[NSMutableString alloc] init];
//imageURL = [[NSURL alloc] init];
}if ([element isEqualToString:#"enclosure"]){
NSString *imageStr = [NSString stringWithString:[attributeDict objectForKey:#"url"]];
imageURL = [NSURL URLWithString:imageStr];
}
}
-(void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[item setObject:desc forKey:#"description"];
[item setObject:pubDate forKey:#"pubDate"];
[item setObject:feedEnclosure forKey:#"enclosure"];
[item setObject:encodedContent forKey:#"content:encoded"];
[item setObject:imageURL forKey:#"url"];
[feeds addObject:[item copy]];
}
}
-(void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
if ([element isEqualToString:#"title"]) {
[title appendString:string];
}else if ([element isEqualToString:#"link"]){
[link appendString:string];
}else if ([element isEqualToString:#"description"]){
[desc appendString:string];
}else if ([element isEqualToString:#"pubDate"]){
[pubDate appendString:string];
}else if ([element isEqualToString:#"content:encoded"]){
[encodedContent appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
Do you people have an idea on how I could get this working?
You are using the ivar imageURL to set the image of each row in the table. This of course means every row will have the same image. You need to store the individual image URLs for each row in the row-specific data.
You seem to be setting the url key in your row-specific data. Use that instead of imageURL when setting up each cell.
Also note that it is a very bad idea to be loading the NSData object on the main thread for each cell. This will make your UI very choppy and unresponsive if the Internet connection is slow at all. There are many solutions to loading the images in the background.
Update:
Try this:
NSURL *url = feeds[indexPath.row][#"url"];
NSData *imageData = [NSData dataWithContentsIfURL:url];

iOS - How do I add search bar function to this array?

can someone please tell me how to add the search function to an array that contains the titles of rss news links that i have gathered using the xml parser in Xcode 4.6.2 here in the following code? All i basically want is to be able to go to the search bar in my viewcontroller whilst in the simulator or app, and be able to search through the different rss headlines which fill the tableview cell in the ns url array i have here in the code.
//
#import "SocialMasterViewController.h"
#import "SocialDetailViewController.h"
#interface SocialMasterViewController () {
NSXMLParser *parser;
NSMutableArray *feeds;
NSMutableDictionary *item;
NSMutableString *title;
NSMutableString *link;
NSString *element;
NSMutableArray *totalStrings;
NSMutableArray *filteredStrings;
BOOL isFiltered;
}
#end
#implementation SocialMasterViewController
-(void)gotosharing {
UIStoryboard *sharingStoryboard = [UIStoryboard storyboardWithName:#"Sharing" bundle:nil];
UIViewController *initialSharingVC = [sharingStoryboard instantiateInitialViewController];
initialSharingVC.modalTransitionStyle = UIModalTransitionStylePartialCurl;
[self presentViewController:initialSharingVC animated:YES completion:nil];
}
- (void)awakeFromNib
{
[super awakeFromNib];
}
- (void)viewDidLoad {
[super viewDidLoad];
self.mySearchBar.delegate = self;
self.myTableView.delegate = self;
self.myTableView.dataSource = self;
feeds = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:#"http://rssmix.com/u/3747019/rss.xml"
];
parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
[parser setDelegate:self];
[parser setShouldResolveExternalEntities:NO];
[parser parse];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table View
// table view and my data source's and delegate methods......
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"title"];
return cell;
static NSString *CellIdentifier =#"Cell";
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc] init];
title = [[NSMutableString alloc] init];
link = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[feeds addObject:[item copy]];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if ([element isEqualToString:#"title"]) {
[title appendString:string];
} else if ([element isEqualToString:#"link"]) {
[link appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSString *string = [feeds[indexPath.row] objectForKey: #"link"];
[[segue destinationViewController] setUrl:string];
}
}
#end
btw this is my masterviewcontroller.m file code
Looking forward to ur response guys :)
Anytime your search bar changes you want to update the contents of the table view.
So, first you filter the url strings then update tableView by reloading the data.
1) Make the calls when search bar changes:
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
[self filterURLsWithSearchBar:searchText];
[self.myTableView reloadData];
}
2) filter the strings you want to show
- (void)filterURLsWithSearchBar:(NSString *)searchText
{
[filteredStrings removeAllObjects];
for (NSString *rssUrl in totalStrings)
{
NSComparisonResult result = [rssUrl compare:searchText
options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch)
range:[rssUrl rangeOfString:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch)]];
if (result == NSOrderedSame) {
[self.filteredStrings addObject:rssUrl];
}
}
}
3) reload table data (needs to change the # of rows and the datasource)
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if ([self.mySerchBar.text isEqualToString:#""] || self.mySearchBar.text == NULL) {
return totalStrings.count;
}
else {
return filteredStrings.count;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"UITableViewCell"];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"UITableViewCell"];
}
if ([self.mySearchBar.text isEqualToString:#""]|| self.mySearchBar.text == NULL)
{
cell.textLabel.text = [totalStrings objectAtIndex:[indexPath row]];
}
else {
cell.textLabel.text = [filteredStrings objectAtIndex:[indexPath row]];
}
return cell;
}

empty tableview rows when parsing with NSXMLPaerser using ASIHTTPRequest

I'm pretty new iPhone development and i have a problem.
After several hours of searching and digging in the code I could understand the source of the problem (hope) but do not know how to solve it.
the problem is that the tableView cells loads before the parser is finish so the "[array count]" is nil.
When I set the 'number of rows in section' manually, the table does appear, but only after a few sec and scrolling up and down.
i have 2 classes, one for XMLParser and one for show the tableView.
According to what I read before I opened this question is that i need to reload the tavleview data but becuase i have 2 various classes i dont know how to do that.
any ideas?
Thanks in davance!
here is my XMLParser code:
- (void)parserDidStartDocument:(NSXMLParser *)parser
{
self.titles = [[NSMutableArray alloc]init];
self.descriptions = [[NSMutableArray alloc]init];
self.links = [[NSMutableArray alloc]init];
self.pubDate = [[NSMutableArray alloc]init];
}
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
}
BOOL isItem = NO;
BOOL isTitle = NO;
BOOL isDesription = NO;
BOOL isImg = NO;
BOOL isPubDate = NO;
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if ([elementName isEqualToString:#"item"]) {
isItem = YES;
}
if ([elementName isEqualToString:#"title"]) {
isTitle=YES;
self.titlesString = [[NSMutableString alloc]init];
}
if ([elementName isEqualToString:#"description"]) {
isDesription = YES;
self.descriptionString = [[NSMutableString alloc]init];;
self.data = [NSMutableData data];
}
if ([elementName isEqualToString:#"pubDate"]) {
isPubDate = YES;
self.pubDateString = [[NSMutableString alloc]init];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
if(isItem && isTitle){
[self.titlesString appendString:string];
}
if (isItem && isDesription) {
[self.descriptionString appendString:string];
}
if (isItem && isPubDate) {
[self.pubDateString appendString:string];
}
}
- (void)parser:(NSXMLParser *)parser foundCDATA:(NSData *)CDATABlock
{
if (self.data)
[self.data appendData:CDATABlock];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if ([elementName isEqualToString:#"item"]) {
isItem = NO;
[self.titles addObject:self.titlesString];
[self.descriptions addObject:self.descriptionString];
[self.pubDate addObject:self.pubDateString];
NSLog(#"%#,%#,%#,",self.titlesString,self.descriptionString,self.pubDate);
}
if ([elementName isEqualToString:#"title"]) {
isTitle=NO;
}
if ([elementName isEqualToString:#"description"]) {
isDesription = NO;
if ([self.data length] > 0)
{
NSString *htmlSnippet = [[NSString alloc] initWithData:self.data encoding:NSUTF8StringEncoding];
NSString *imageSrc = [self firstImgUrlString:htmlSnippet];
[self.links addObject:imageSrc];
}
self.data = nil;
}
if([elementName isEqualToString:#"pubDate"])
isPubDate = NO;
}
- (NSString *)firstImgUrlString:(NSString *)string
{
NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"(<img\\s[\\s\\S]*?src\\s*?=\\s*?['\"](.*?)['\"][\\s\\S]*?>)+?"
options:NSRegularExpressionCaseInsensitive
error:&error];
NSTextCheckingResult *result = [regex firstMatchInString:string
options:0
range:NSMakeRange(0, [string length])];
if (result)
return [string substringWithRange:[result rangeAtIndex:2]];
return nil;
}
and here's my show tableView code:
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"menuButton.png"] style:UIBarButtonItemStyleBordered target:self.viewDeckController action:#selector(toggleLeftView)];
NSURL *url;
if (!self.isGetLink)
url = [NSURL URLWithString:#"http://www.ynet.co.il/Integration/StoryRss2.xml"];
else
url = [NSURL URLWithString:self.linkForParsingString];
if (!self.xmlParser) {
self.xmlParser = [[XMLparser alloc]init];
[self.xmlParser LoadXMLWithURl:url];
}
self.isGetLink = NO;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (void)registerNib:(UINib *)nib forCellReuseIdentifier:(NSString *)identifier
{
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [self.xmlParser.titles count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CustomCell";
CustomCell *cell = (CustomCell*) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.lblTitle.text = [self.xmlParser.titles objectAtIndex:indexPath.row];
cell.lblTitle.font = [UIFont boldSystemFontOfSize:[UIFont systemFontSize]];
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:[self.xmlParser.links objectAtIndex:indexPath.row]]];
cell.imgView.image = [UIImage imageWithData:data];
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 82;
}
#pragma mark - Table view delegate
NSString *curnentDes;
NSString *currentTitle;
NSString *currentPubDate;
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
ReadViewController *rvc = [[ReadViewController alloc]initWithNibName:#"ReadViewController" bundle:nil];
curnentDes = [self.xmlParser.descriptions objectAtIndex:indexPath.row];
currentTitle = [self.xmlParser.titles objectAtIndex:indexPath.row];
currentPubDate = [self.xmlParser.pubDate objectAtIndex:indexPath.row];
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc]init];
[inputFormatter setDateFormat:#"EEE, dd MMM yyyy HH:mm:ss Z"];
NSDate *inputDate = [inputFormatter dateFromString:currentPubDate];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc]init];
[outputFormatter setDateFormat:#"dd/MM/yyyy HH:mm"];
NSString *outputDate = [outputFormatter stringFromDate:inputDate];
rvc.description = curnentDes;
rvc.stitle = currentTitle;
rvc.pubDate = outputDate;
[self.navigationController pushViewController:rvc animated:YES];
}
Pretty simple reload the table after your parsing is done, you are good to go. The reason your data comes after scrolling is your array is updated at a later point and then cellForRowAtIndex is called and array has content so you see rows.
Note: cellForRow is called for every row (hope you know that).
Using notification:
In your parser class
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
[[NSNotificationCenter defaultCenter ]postNotificationName:#"parsingComplete" object:nil];
}
In ViewDidLoad of your table view class add this code and add the other functions anywhere in ur class:
your viewDidLoad(edited)
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(parsingComplete) name:#"parsingComplete" object:nil];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"menuButton.png"] style:UIBarButtonItemStyleBordered target:self.viewDeckController action:#selector(toggleLeftView)];
NSURL *url;
if (!self.isGetLink)
url = [NSURL URLWithString:#"http://www.ynet.co.il/Integration/StoryRss2.xml"];
else
url = [NSURL URLWithString:self.linkForParsingString];
if (!self.xmlParser) {
self.xmlParser = [[XMLparser alloc]init];
[self.xmlParser LoadXMLWithURl:url];
}
self.isGetLink = NO;
}
//Function to handle notification:
-(void)parsingComplete
{
NSLog(#"parsing results: %#",self.xmlParser.titles);
//change your tableViewName
[yourTableView reloadData];
}
//removing notification:
-(void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
Reload the table once parsing is completed. Use delegate methods to reload the table view from didEndElement method. Try some think like this.
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if([elementName isEqualToString:#"Final Element"])
{
// Reload your table View using delegates
}
}

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