Loading RSS feed items in a table view... Please HELP :)
I am still stuck with loading some RSS data in a table view. None of the template I found do what I want and I'm managing in amending them...
Is there an easy way to populate data in a table view from a RSS feed?
I mean I have a home screen based on a view-based application with a clean artwork. Then, I have 3 buttons leading to 3 different setions.
Then, on each section, I'm trying to load some items into a table from a RSS feed but I'm not managing to do it...
Could someone please walk me through?
I'm really new to iPhone & Objective C dev...
Many thanks to everyone!!!!
Here is one .h on one of the 3 sections
Code:
#import <UIKit/UIKit.h>
#import "MProjectAppDelegate.h"
#import "ArticleViewController.h"
@interface EntreesViewController : UIViewController {
ArticleViewController *showArticleViewController;
IBOutlet UITableView * newsTable;
UIActivityIndicatorView * activityIndicator;
CGSize cellSize;
NSXMLParser * rssParser;
NSMutableArray * stories;
// a temporary item; added to the "stories" array one at a time, and cleared for the next one
NSMutableDictionary * item;
// it parses through the document, from top to bottom...
// we collect and cache each sub-element value, and then save each item to our array.
// we use these to track each current item, until it's ready to be added to the "stories" array
NSString * currentElement;
NSMutableString * currentTitle, * currentDate, * currentSummary, * currentLink;
IBOutlet UIButton *menu;
IBOutlet UIButton *retourEntrees;
}
-(IBAction)retourEntreesClick:(id)sender;
//
@property(nonatomic, retain) ArticleViewController *showArticleViewController;
@end
And the .m which goes with it
Code:
#import "EntreesViewController.h"
#import "ArticleViewController.h"
@implementation EntreesViewController
@synthesize showArticleViewController;
-(IBAction)retourEntreesClick:(id)sender
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:10.0];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft
forView:[self view]
cache:YES];
[self.view removeFromSuperview];
[UIView commitAnimations];
NSLog(@"Exiting view function OK");
}
- (void)viewDidLoad {
NSLog(@"ViewDidLoad OK");
// Add the following line if you want the list to be editable
// self.navigationItem.leftBarButtonItem = self.editButtonItem;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
NSLog(@"Number of Section OK");
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [stories count];
NSLog(@"Stories Count OK");
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = @"MyIdentifier";
NSLog(@"Identifier OK");
//
// Setting up the Cell
//
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
}
// Set up the cell
int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
[cell setText:[[stories objectAtIndex: storyIndex] objectForKey: @"title"]];
// Setting up the arrow at the end of the line
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
return cell;
//
// End of Cell definition on the main menu page
//
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic
int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
NSString * storySummary = [[stories objectAtIndex: storyIndex] objectForKey: @"link"];
// storySummary = [storySummary stringByReplacingOccurrencesOfString:@" " withString:@""];
// storySummary = [storySummary stringByReplacingOccurrencesOfString:@"\n" withString:@""];
// storySummary = [storySummary stringByReplacingOccurrencesOfString:@" " withString:@""];
NSLog(@"summary: %@", storySummary);
//
// Open in a new NIB
if (self.showArticleViewController == nil) {
ArticleViewController *tmpViewController = [[ArticleViewController alloc] initWithNibName:@"ArticleViewController" bundle:nil];
self.showArticleViewController = tmpViewController;
[tmpViewController release];
}
[self.navigationController pushViewController:showArticleViewController animated:YES];
[self.showArticleViewController.detailDescription setText:storySummary];
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if ([stories count] == 0) {
NSString * path = @"http://mini-marmiton.com/mini-marmiton-rss-provider.php";
[self parseXMLFileAtURL:path];
}
cellSize = CGSizeMake([newsTable bounds].size.width, 60);
}
- (void)viewWillDisappear:(BOOL)animated {
}
- (void)viewDidDisappear:(BOOL)animated {
}
- (void)parserDidStartDocument:(NSXMLParser *)parser{
NSLog(@"found file and started parsing");
}
- (void)parseXMLFileAtURL:(NSString *)URL
{
stories = [[NSMutableArray alloc] init];
//you must then convert the path to a proper NSURL or it won't work
NSURL *xmlURL = [NSURL URLWithString:URL];
// here, for some reason you have to use NSClassFromString when trying to alloc NSXMLParser, otherwise you will get an object not found error
// this may be necessary only for the toolchain
rssParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
// Set self as the delegate of the parser so that it will receive the parser delegate methods callbacks.
[rssParser setDelegate:self];
// Depending on the XML document you're parsing, you may want to enable these features of NSXMLParser.
[rssParser setShouldProcessNamespaces:NO];
[rssParser setShouldReportNamespacePrefixes:NO];
[rssParser setShouldResolveExternalEntities:NO];
[rssParser parse];
}
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {
NSString * errorString = [NSString stringWithFormat:@"Unable to download story feed from web site (Error code %i )", [parseError code]];
NSLog(@"error parsing XML: %@", errorString);
UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Error loading content" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
//NSLog(@"found this element: %@", elementName);
currentElement = [elementName copy];
if ([elementName isEqualToString:@"item"]) {
// clear out our story item caches...
item = [[NSMutableDictionary alloc] init];
currentTitle = [[NSMutableString alloc] init];
currentDate = [[NSMutableString alloc] init];
currentSummary = [[NSMutableString alloc] init];
currentLink = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
//NSLog(@"ended element: %@", elementName);
if ([elementName isEqualToString:@"item"]) {
// save values to an item, then store that item into the array...
[item setObject:currentTitle forKey:@"title"];
[item setObject:currentLink forKey:@"link"];
[item setObject:currentSummary forKey:@"summary"];
[item setObject:currentDate forKey:@"date"];
[stories addObject:[item copy]];
NSLog(@"adding story: %@", currentTitle);
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
//NSLog(@"found characters: %@", string);
// save the characters for the current item...
if ([currentElement isEqualToString:@"title"]) {
[currentTitle appendString:string];
} else if ([currentElement isEqualToString:@"link"]) {
[currentLink appendString:string];
} else if ([currentElement isEqualToString:@"description"]) {
[currentSummary appendString:string];
} else if ([currentElement isEqualToString:@"pubDate"]) {
[currentDate appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
NSLog(@"all done!");
NSLog(@"stories array has %d items", [stories count]);
[newsTable reloadData];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
}
- (void)dealloc {
NSLog(@"dealloc OK");
[currentElement release];
[rssParser release];
[stories release];
[item release];
[currentTitle release];
[currentDate release];
[currentSummary release];
[currentLink release];
[super dealloc];
}
@end
I am still stuck with loading some RSS data in a table view. None of the template I found do what I want and I'm managing in amending them...
Is there an easy way to populate data in a table view from a RSS feed?
I mean I have a home screen based on a view-based application with a clean artwork. Then, I have 3 buttons leading to 3 different setions.
Then, on each section, I'm trying to load some items into a table from a RSS feed but I'm not managing to do it...
Could someone please walk me through?
I'm really new to iPhone & Objective C dev...
Many thanks to everyone!!!!
Here is one .h on one of the 3 sections
Code:
#import <UIKit/UIKit.h>
#import "MProjectAppDelegate.h"
#import "ArticleViewController.h"
@interface EntreesViewController : UIViewController {
ArticleViewController *showArticleViewController;
IBOutlet UITableView * newsTable;
UIActivityIndicatorView * activityIndicator;
CGSize cellSize;
NSXMLParser * rssParser;
NSMutableArray * stories;
// a temporary item; added to the "stories" array one at a time, and cleared for the next one
NSMutableDictionary * item;
// it parses through the document, from top to bottom...
// we collect and cache each sub-element value, and then save each item to our array.
// we use these to track each current item, until it's ready to be added to the "stories" array
NSString * currentElement;
NSMutableString * currentTitle, * currentDate, * currentSummary, * currentLink;
IBOutlet UIButton *menu;
IBOutlet UIButton *retourEntrees;
}
-(IBAction)retourEntreesClick:(id)sender;
//
@property(nonatomic, retain) ArticleViewController *showArticleViewController;
@end
And the .m which goes with it
Code:
#import "EntreesViewController.h"
#import "ArticleViewController.h"
@implementation EntreesViewController
@synthesize showArticleViewController;
-(IBAction)retourEntreesClick:(id)sender
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:10.0];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft
forView:[self view]
cache:YES];
[self.view removeFromSuperview];
[UIView commitAnimations];
NSLog(@"Exiting view function OK");
}
- (void)viewDidLoad {
NSLog(@"ViewDidLoad OK");
// Add the following line if you want the list to be editable
// self.navigationItem.leftBarButtonItem = self.editButtonItem;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
NSLog(@"Number of Section OK");
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [stories count];
NSLog(@"Stories Count OK");
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = @"MyIdentifier";
NSLog(@"Identifier OK");
//
// Setting up the Cell
//
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
}
// Set up the cell
int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
[cell setText:[[stories objectAtIndex: storyIndex] objectForKey: @"title"]];
// Setting up the arrow at the end of the line
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
return cell;
//
// End of Cell definition on the main menu page
//
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic
int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
NSString * storySummary = [[stories objectAtIndex: storyIndex] objectForKey: @"link"];
// storySummary = [storySummary stringByReplacingOccurrencesOfString:@" " withString:@""];
// storySummary = [storySummary stringByReplacingOccurrencesOfString:@"\n" withString:@""];
// storySummary = [storySummary stringByReplacingOccurrencesOfString:@" " withString:@""];
NSLog(@"summary: %@", storySummary);
//
// Open in a new NIB
if (self.showArticleViewController == nil) {
ArticleViewController *tmpViewController = [[ArticleViewController alloc] initWithNibName:@"ArticleViewController" bundle:nil];
self.showArticleViewController = tmpViewController;
[tmpViewController release];
}
[self.navigationController pushViewController:showArticleViewController animated:YES];
[self.showArticleViewController.detailDescription setText:storySummary];
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if ([stories count] == 0) {
NSString * path = @"http://mini-marmiton.com/mini-marmiton-rss-provider.php";
[self parseXMLFileAtURL:path];
}
cellSize = CGSizeMake([newsTable bounds].size.width, 60);
}
- (void)viewWillDisappear:(BOOL)animated {
}
- (void)viewDidDisappear:(BOOL)animated {
}
- (void)parserDidStartDocument:(NSXMLParser *)parser{
NSLog(@"found file and started parsing");
}
- (void)parseXMLFileAtURL:(NSString *)URL
{
stories = [[NSMutableArray alloc] init];
//you must then convert the path to a proper NSURL or it won't work
NSURL *xmlURL = [NSURL URLWithString:URL];
// here, for some reason you have to use NSClassFromString when trying to alloc NSXMLParser, otherwise you will get an object not found error
// this may be necessary only for the toolchain
rssParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
// Set self as the delegate of the parser so that it will receive the parser delegate methods callbacks.
[rssParser setDelegate:self];
// Depending on the XML document you're parsing, you may want to enable these features of NSXMLParser.
[rssParser setShouldProcessNamespaces:NO];
[rssParser setShouldReportNamespacePrefixes:NO];
[rssParser setShouldResolveExternalEntities:NO];
[rssParser parse];
}
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {
NSString * errorString = [NSString stringWithFormat:@"Unable to download story feed from web site (Error code %i )", [parseError code]];
NSLog(@"error parsing XML: %@", errorString);
UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Error loading content" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
//NSLog(@"found this element: %@", elementName);
currentElement = [elementName copy];
if ([elementName isEqualToString:@"item"]) {
// clear out our story item caches...
item = [[NSMutableDictionary alloc] init];
currentTitle = [[NSMutableString alloc] init];
currentDate = [[NSMutableString alloc] init];
currentSummary = [[NSMutableString alloc] init];
currentLink = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
//NSLog(@"ended element: %@", elementName);
if ([elementName isEqualToString:@"item"]) {
// save values to an item, then store that item into the array...
[item setObject:currentTitle forKey:@"title"];
[item setObject:currentLink forKey:@"link"];
[item setObject:currentSummary forKey:@"summary"];
[item setObject:currentDate forKey:@"date"];
[stories addObject:[item copy]];
NSLog(@"adding story: %@", currentTitle);
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
//NSLog(@"found characters: %@", string);
// save the characters for the current item...
if ([currentElement isEqualToString:@"title"]) {
[currentTitle appendString:string];
} else if ([currentElement isEqualToString:@"link"]) {
[currentLink appendString:string];
} else if ([currentElement isEqualToString:@"description"]) {
[currentSummary appendString:string];
} else if ([currentElement isEqualToString:@"pubDate"]) {
[currentDate appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
NSLog(@"all done!");
NSLog(@"stories array has %d items", [stories count]);
[newsTable reloadData];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
}
- (void)dealloc {
NSLog(@"dealloc OK");
[currentElement release];
[rssParser release];
[stories release];
[item release];
[currentTitle release];
[currentDate release];
[currentSummary release];
[currentLink release];
[super dealloc];
}
@end
Loading RSS feed items in a table view... Please HELP :)
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