NSXMLParser的问题

时间：2014-06-05 12:37:55

标签： ios objective-c ios7 xml-parsing nsxmlparser

我正在使用NSXMLParser来解析XML文件，以便我可以在表视图中显示来自RSS提要的数据。但是，标题数据被正确解析并传递给适当的数组，但在将值传递给单元格标题后，每个标题后面会出现三个句点。我在将值传递给单元格之前将值记录到控制台，并且文本行中没有句点。此外，无论如何，发布日期都返回null。

FeedContoller.m：

@interface FeedController2 ()

@property (nonatomic, strong) NSArray* profileImages;

@end

@implementation FeedController2

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];


    titarry=[[NSMutableArray alloc] init];
    linkarray=[[NSMutableArray alloc] init];
    NSString *rssaddr=@"http://cazhigh.com/caz/gold/?feed=rss2";
    NSURL *url=[NSURL URLWithString:rssaddr];
    xmlparser =[[NSXMLParser alloc] initWithContentsOfURL:url];
    [xmlparser setDelegate:self];
    [xmlparser parse];

    NSString* boldFontName = @"GillSans-Bold";
    [self styleNavigationBarWithFontName:boldFontName];
    self.title = @"Blog Feed";

    self.feedTableView.dataSource = self;
    self.feedTableView.delegate = self;
    self.feedTableView.backgroundColor = [UIColor whiteColor];
    self.feedTableView.separatorColor = [UIColor colorWithWhite:0.9 alpha:0.6];
}

/*
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}
*/

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    //return [titarry count];
    if(titarry.count <= 5){
        return titarry.count;
    }else{
        return 5;
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    static NSString *CellIdentifier = @"FeedCell2";

    FeedCell2* cell = [tableView dequeueReusableCellWithIdentifier:@"FeedCell2"];

    if (cell == nil) {
        cell = [[FeedCell2 alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] ;
    }

    cell.nameLabel.text=[titarry objectAtIndex:indexPath.row];
    NSLog(@"Title: %@", [titarry objectAtIndex:indexPath.row]); //Log title from array
    NSLog(@"Date Posted: %@", [datearray objectAtIndex:indexPath.row]); //Log date posted
    NSLog(@"Link Address: %@", [linkarray objectAtIndex:indexPath.row]); //Log link address
    //cell.accessoryType=UITableViewCellSelectionStyleBlue;
    return cell;
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {


    XMLViewController *second = [[XMLViewController alloc] initWithNibName:@"XMLViewController" bundle:nil];
    [self.navigationController pushViewController:second animated:YES];
    NSURL *url=[NSURL URLWithString:[linkarray objectAtIndex:indexPath.row]];
    NSURLRequest *req=[NSURLRequest requestWithURL:url];
    second.XMLWebView.scalesPageToFit=YES;
    [second.XMLWebView loadRequest:req];//here we have to perform changes try to do some things here

}


-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    return 200;
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict;
{

    classelement=elementName;

    if([elementName isEqualToString:@"item"])
    {
        itemselected=YES;
        mutttitle=[[NSMutableString alloc] init];
        mutstrlink=[[NSMutableString alloc] init];
        mutstrdate=[[NSMutableString alloc] init];
    }
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName;
{
    if([elementName isEqualToString:@"item"])
    {
        itemselected=NO;

        [titarry addObject:mutttitle];
        [linkarray addObject:mutstrlink];
        [datearray addObject:mutstrdate];

    }

}


- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string;
{
    if (itemselected)
    {
        if ([classelement isEqualToString:@"title"])
        {
            [mutttitle appendString:string];
        }
        else if ([classelement isEqualToString:@"link"])
        {
            [mutstrlink appendString:string];
        }else if ([classelement isEqualToString:@"pubDate"])
        {
            [mutstrdate appendString:string];
        }
    }
}

- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError;
{
    UIAlertView *alt=[[UIAlertView alloc] initWithTitle:@"RSS Reader"
                                                message:[NSString stringWithFormat:@"%@",parseError]
                                               delegate:nil
                                      cancelButtonTitle:@"Close"
                                      otherButtonTitles:nil];

    [alt show];


}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)styleNavigationBarWithFontName:(NSString*)navigationTitleFont{

    UIImageView* searchView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"search.png"]];
    searchView.frame = CGRectMake(0, 0, 20, 20);

    UIBarButtonItem* searchItem = [[UIBarButtonItem alloc] initWithCustomView:searchView];

    self.navigationItem.rightBarButtonItem = searchItem;
}

-(IBAction)dismissView:(id)sender{
    [self dismissViewControllerAnimated:YES completion:nil];
}

@end

XML：

<item>
<title>Back-to-school issue of Blue and Gold in the mail</title>
<link>http://cazhigh.com/caz/gold/?p=2896</link>
<comments>http://cazhigh.com/caz/gold/?p=2896#comments</comments>
<pubDate>Thu, 29 Aug 2013 12:35:40 +0000</pubDate>
<dc:creator>...</dc:creator>
<category>...</category>
<category>...</category>
<category>...</category>
<guid isPermaLink="false">http://cazhigh.com/caz/gold/?p=2896</guid>
<description>
<![CDATA[
<img width="150" height="150" src="http://cazhigh.com/caz/gold/wp-content/uploads/2013/08/BluGold_BacktoSchool2013_cover-150x150.jpg" class="attachment-thumbnail wp-post-image" alt="Blue and Gold (Back to School 2013)" style="display: block; margin-bottom: 5px; clear:both;" />Be on the lookout for the September 2013 edition of the Blue and Gold newsletter, which should be arriving in the mail soon.  Included in the newsletter are district policies and notifications that we urge you to review, become familiar with and keep for your reference throughout the school year. The issue also provides some [&#8230;]
]]>
</description>
<content:encoded>
<![CDATA[
<img width="150" height="150" src="http://cazhigh.com/caz/gold/wp-content/uploads/2013/08/BluGold_BacktoSchool2013_cover-150x150.jpg" class="attachment-thumbnail wp-post-image" alt="Blue and Gold (Back to School 2013)" style="display: block; margin-bottom: 5px; clear:both;" /><div id="attachment_2898" style="width: 241px" class="wp-caption alignright"><a href="http://cazhigh.com/caz/gold/wp-file-browser-top/blueandgold/Blue%20and%20Gold%20(September%202013)"><img class="size-medium wp-image-2898 " alt="Blue and Gold (Back to School 2013)" src="http://cazhigh.com/caz/gold/wp-content/uploads/2013/08/BluGold_BacktoSchool2013_cover-231x300.jpg" width="231" height="300" /></a><p class="wp-caption-text">Blue and Gold (Back to School 2013)</p></div> <p itemprop="name"><span style="font-size: 13px;">Be on the lookout for the September 2013 edition of the Blue and Gold newsletter, which should be arriving in the mail soon. </span></p> <div itemprop="description articleBody"> <p>Included in the newsletter are district policies and notifications that we urge you to review, become familiar with and keep for your reference throughout the school year.</p> <p>The issue also provides some updates on work undertaken in Cazenovia schools — on everything from curricula to facilities — over the summer break, as well as &#8220;welcome back&#8221; messages from Superintendent of Schools Robert S. Dubik, Cazenovia High School Principal Eric Schnabl and Assistant Principal Susan Vickers, Cazenovia Middle School Principal Jean Regan and Burton Street Elementary Principal Mary-Ann MacIntosh.</p> <p>If you have questions related to the policies or notifications included in the newsletter, please call the district office at (315) 655-1317.</p> <p>The newsletter is also <span style="color: #000080;"><a title="link to Blue and Gold (September 2013)" href="http://cazhigh.com/caz/gold/wp-file-browser-top/blueandgold/Blue%20and%20Gold%20(September%202013)" target="_blank"><span style="color: #000080;"><b>available online</b></span></a></span>.</p> </div>
]]>
</content:encoded>
<wfw:commentRss>http://cazhigh.com/caz/gold/?feed=rss2&p=2896</wfw:commentRss>
<slash:comments>0</slash:comments>
</item>

调试： enter image description here

1 个答案:

答案 0 :(得分：0)

但是我还没弄清楚最初会导致＆＃34; ...＆＃34;在每个标题或如何解决之后，我已经做了一个简单的工作，这项工作就好了。它接受字符串，并从字符串中减去最后三个字符，然后输出到表中，如下所示：

NSString *RSSTitle = nil;
RSSTitle = [titarry objectAtIndex:indexPath.row];
RSSTitle = [RSSTitle substringToIndex:[RSSTitle length] - 3];
cell.nameLabel.text= RSSTitle;
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