从RSS源中的iOS应用

Question

我想创建一个简单的RSS阅读器显示“说明”，我想从RSS源获取“description”标签，并在我的应用程序显示出来，任何帮助吗？

是不是最好使用NSXMLParser或任何其他解析器，使我的工作容易吗？

我使用的源代码是：iOS programming RSS reader tutorial

Answer 1

与教程人离开什么。一切工作正常呐。他们 只是留下来使用说明项目。对 ...？

这里从教程云：

@interface ViewController(){ 

NSXMLParser *parser; 
    NSMutableArray *feeds; 
    NSMutableDictionary *item; 
    NSMutableString *title; 
    NSMutableString *link; 
    NSString *element; 

NSMutableString *desc; // Description . 
} 

只需粘贴此代码。作品般的魅力：

#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]; 
    } 
} 

-(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"]; 
     [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]; 
    } 
} 


-(void) parserDidEndDocument:(NSXMLParser *)parser{ 
    [self.tableView reloadData]; 
} 

使用此参数说明随时随地获得 的RSSFeed项目的说明。

这里是它完成：

-(void) tableView: (UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 
    NSString *string = [feeds[indexPath.row] objectForKey: @"description"]; 

    stringUrl = [feeds[indexPath.row] objectForKey:@"link"]; 
    NSLog(@"Description %@", string); 

    actionSheet = [[UIActionSheet alloc] initWithTitle:string delegate:self cancelButtonTitle:Nil destructiveButtonTitle:@"OK" otherButtonTitles:@"GoTo URL", nil]; 
    actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent; 

    [actionSheet showInView:self.view]; 

} 

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex; 
{ 
    self.actionSheet.delegate = self; 
    switch (buttonIndex) { 
     case 0: 
       NSLog(@"ButtonIndex at 0"); 
       break; 

     case 1: 
      NSLog(@"ButtonIndex at 1"); 
      //Add your Segue functionalities over here to open link on the browser . 

    } 
       break; 
     } 

} 

如果你有这里的任何问题，PLZ使用 “％@” 来回串显示所有让我知道:::