ios 简单的rss 解析应用demo

1.主文件: RootViewController.h

#import <UIKit/UIKit.h>@interface RootViewController : UITableViewController {NSMutableArray *rssList;NSMutableDictionary *currentItem;NSMutableString *currentContents;    }@property (nonatomic, retain) NSMutableArray *rssList;@end

#import "RootViewController.h"#import "InternetNewsAppDelegate.h"#import "DetailViewController.h"@implementation RootViewController@synthesize rssList;#pragma mark -#pragma mark View lifecycle- (void)viewDidLoad {    [super viewDidLoad];    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.    // self.navigationItem.rightBarButtonItem = self.editButtonItem;self.title = @"国际要闻";self.rssList = [[NSMutableArray alloc] init];//NSXMLParser *firstParser = [[NSXMLParser alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://rss.sina.com.cn/news/world/focus15.xml"]];    NSXMLParser *firstParser = [[NSXMLParser alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://www.alibuybuy.com/feed"]];firstParser.delegate = self;   [firstParser parse];}#pragma mark -#pragma mark NSXMLParser delegate Methods- (void)parserDidStartDocument:(NSXMLParser *)parser{NSLog(@"startParser----------------------");}- (void)parserDidEndDocument:(NSXMLParser *)parser{NSLog(@"end:----------------------");[parser release];NSLog(@"%@",rssList);}- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{if([elementName isEqualToString:@"item"]){currentItem = [[NSMutableDictionary alloc] init];}else if (currentItem != NULL){currentContents = [[NSMutableString alloc] init];}}- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{if([elementName isEqualToString:@"item"]){[rssList addObject:currentItem];[currentItem release];}else if (currentContents && currentItem){[currentItem setObject:currentContents forKey:elementName];[currentContents release];currentContents = nil;}}- (void)parser:(NSXMLParser *)parser foundCDATA:(NSData *)CDATABlock{if(currentItem && currentContents){currentContents = [[NSMutableString alloc] initWithData:CDATABlock encoding:NSUTF8StringEncoding];}}- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{if(currentItem && currentContents){[currentContents appendString:string];}}/*- (void)viewWillAppear:(BOOL)animated {    [super viewWillAppear:animated];}*//*- (void)viewDidAppear:(BOOL)animated {    [super viewDidAppear:animated];}*//*- (void)viewWillDisappear:(BOOL)animated {[super viewWillDisappear:animated];}*//*- (void)viewDidDisappear:(BOOL)animated {[super viewDidDisappear:animated];}*//* // Override to allow orientations other than the default portrait orientation.- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {// Return YES for supported orientations.return (interfaceOrientation == UIInterfaceOrientationPortrait);} */#pragma mark -#pragma mark Table view data source// Customize the number of sections in the table view.- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {    return 1;}// Customize the number of rows in the table view.- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    return [rssList count];}// Customize the appearance of table view cells.- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {        static NSString *CellIdentifier = @"Cell";        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];    if (cell == nil) {        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];    }        // Configure the cell...cell.textLabel.text = [[rssList objectAtIndex:indexPath.row] objectForKey:@"title"];    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;        return cell;}/*// Override to support conditional editing of the table view.- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {    // Return NO if you do not want the specified item to be editable.    return YES;}*//*// Override to support editing the table view.- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {        if (editingStyle == UITableViewCellEditingStyleDelete) {        // Delete the row from the data source.        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];    }       else if (editingStyle == UITableViewCellEditingStyleInsert) {        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.    }   }*//*// Override to support rearranging the table view.- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {}*//*// Override to support conditional rearranging of the table view.- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {    // Return NO if you do not want the item to be re-orderable.    return YES;}*/#pragma mark -#pragma mark Table view delegate//当点击cell后利用 NSNotificationCenter将消息传递给 DetailViewController- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {        NSString *des = [[rssList objectAtIndex:indexPath.row]objectForKey:@"description"];        DetailViewController *detailView = [[DetailViewController alloc] init];    NSLog(@"%@", self.navigationController.view);    [[self navigationController] pushViewController:detailView animated:YES];          [[NSNotificationCenter defaultCenter] postNotificationName:@"onClicked" object:des];        [detailView release];}#pragma mark -#pragma mark Memory management- (void)didReceiveMemoryWarning {    // Releases the view if it doesn't have a superview.    [super didReceiveMemoryWarning];        // Relinquish ownership any cached data, images, etc that aren't in use.}- (void)viewDidUnload {    // Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.    // For example: self.myOutlet = nil;}- (void)dealloc {[rssList release];    [super dealloc];}@end

DetailViewController (详细展示页)

////  DetailViewController.m//  InternetNews////  Created by zhang peng on 13-4-16.////#import "DetailViewController.h"#import "RootViewController.h"#import "InternetNewsAppDelegate.h"@implementation DetailViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];    if (self) {                label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 300, 800)];        label.numberOfLines = 10;                       InternetNewsAppDelegate *del = [(InternetNewsAppDelegate *)[UIApplication sharedApplication] delegate];        NSLog(@"%@", self.view);                [self.view addSubview:label];        //label.text = del.des;                        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(test:) name:@"onClicked" object:nil];    }    return self;}- (void) test:(NSNotification*) notification{    NSLog(@"%@", notification);    label.text = notification.object;    [label sizeToFit];}- (void)viewDidLoad{    [super viewDidLoad];// Do any additional setup after loading the view.}- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}/*// Only override drawRect: if you perform custom drawing.// An empty implementation adversely affects performance during animation.- (void)drawRect:(CGRect)rect{    // Drawing code}*/@end