I am not able to parse media content tag in below rss
http://news.yahoo.com/rss/
tried this......
if ([elementName isEqualToString:#"media:thumbnail"])
{
NSString *imgURL=[attributeDict valueForKey:#"url"];
NSLog(#"imgURL %#",imgURL);
}
Related
I have a list of RSS feeds and I need to display the detail of each feed in iPhone. I got all RSS feeds from the server which I'm displaying in tableview. Now on selecting a row I need to display the discription of RSS Feed which is coming from Server in HTML content like:-
<img border=\"0\" hspace=\"10\" align=\"left\" style=\"margin-top:3px;margin-right:5px;\" src=\"http://timesofindia.indiatimes.com/photo/4881843.cms\" />Cadila Pharmaceutical will seek the govt's nod in two days for initiating clinical trials for a vaccine against swine flu.<img width='1' height='1' src='http://timesofindia.feedsportal.com/c/33039/f/533968/s/1f181b11/mf.gif' border='0'/><div class='mf-viral'><table border='0'><tr><td valign='middle'><img src=\"http://res3.feedsportal.com/images/emailthis2.gif\" border=\"0\" /></td><td valign='middle'><img src=\"http://res3.feedsportal.com/images/bookmark.gif\" border=\"0\" /></td></tr></table></div><br/><br/><img src=\"http://da.feedsportal.com/r/133515347892/u/0/f/533968/c/33039/s/1f181b11/a2.img\" border=\"0\"/><img width=\"1\" height=\"1\" src=\"http://pi.feedsportal.com/r/133515347892/u/0/f/533968/c/33039/s/1f181b11/a2t.img\" border=\"0\"/>
How do I display this HTML Content in our iPhone UI, as this will contain text,hyperlink and images.
Is it proper way to use UIWebview in this case, as UIWebView is heavy weight.
Please read this blog : http://www.raywenderlich.com/2636/how-to-make-a-simple-rss-reader-iphone-app-tutorial,
It is useful for you.
you can do something like below.
first of all
descLbl.text=[self flattenHTML:descLbl.text];//descLbl.text is a text in which you are getting that HTML description...
now in flattenHTML method write like below...
- (NSString *)flattenHTML:(NSString *)html {
NSScanner *thescanner;
NSString *text = nil;
thescanner = [NSScanner scannerWithString:html];
while ([thescanner isAtEnd] == NO) {
[thescanner scanUpToString:#"<" intoString:NULL];
// find end of tag
[thescanner scanUpToString:#">" intoString:&text];
html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:#"\n"] withString:#" "];
// replace the found tag with a space
//(you can filter multi-spaces out later if you wish)
html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:#"%#>", text] withString:#" "];
} // while //
return html;
}
let me know it is working or not..
Happy coding!!!!
If you are planning to show HTML entities as it is, i would suggest to go with UIWebView. You can pass this HTML as a string in method loadHTMLString:
If you want the user to view the content as a web page, then loading the url in UIWebView is the best and easiest way.
Like this:
UIWebView *webView = [[UIWebView alloc] init];
NSURL *pageurl = [NSURL URLWithString:http://www.google.com];
NSURLRequest *request = [NSURLRequest requestWithURL:pageurl];
[webView loadRequest:request];
You can simply use RSSKit library.
I don't know how to parse HTML page content in iPhone SDK?
I have an iPhone app, in this app I need to show the image and data from the HTML page. I have an HTML page URL, I need to get data from the HTML page URL. Can anyone please guide me to parse HTML content from HTML page and show in iPhone app?
Can you please help me?
EDIT
I have an website in HTML format like this http://www.example.com/mobile/403.html page. I want to develop a native iPhone app for this website. My client wont give the response in XML feed so i need to use this site and parse the HTML contents. This page having many images, live data and tables. Till now i didn't parsed HTML page/content in iPhone SDK. So i need your help to do this? Can you please help me? I hope it is clear comparing with old question. Thanks in advance.
You can add the the image url to the NSMutableArray as code below..
NSMutableArray *array = [[NSMutableArray alloc] init];
NSString *response = [[NSString alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"index1" ofType:#"html"] encoding:NSUTF8StringEncoding error:nil];
// NSLog(#"response == %#", response);
NSString *regexStr = #"<a href=\"([^>]*)\">";
//NSString *regexStr = #"<A HREF=\"([^>]*)\">";
NSError *error;
NSInteger i =0;
// NSInteger length =0;
while (i<[response length]) {
NSRegularExpression *testRegex = [NSRegularExpression regularExpressionWithPattern:regexStr options:NSRegularExpressionCaseInsensitive error:&error];
if( testRegex == nil ) NSLog( #"Error making regex: %#", error );
NSTextCheckingResult *result = [testRegex firstMatchInString:response options:0 range:NSMakeRange(i, [response length]-i)];
// NSLog(#"result == %#",result);
NSRange range = [result rangeAtIndex:1];
if (range.location == 0) {
break;
}
NSString * imageUrl = [response substringWithRange:range];
if ([imageUrl hasSuffix:#".jpg"] || [imageUrl hasSuffix:#".gif"] || [imageUrl hasSuffix:#".tiff"] || [imageUrl hasSuffix:#".JPG"] || [imageUrl hasSuffix:#".JPEG"] || [imageUrl hasSuffix:#".png"] || [imageUrl hasSuffix:#".PNG"] || [imageUrl hasSuffix:#".GIF"] || [imageUrl hasSuffix:#".TIFF"]) {
// NSLog(#"%#",imageUrl);
// imageUrl = [imageUrl stringByReplacingOccurrencesOfString:#"/syneye_Portfolio/" withString:#""];
[array addObject:imageUrl];
//[array retain];
}
i= range.location;
//NSLog(#"%i",range.location);
i=i+range.length;
}
You should get the HTML thanks to a networking framework (AFNetworking for instance) and parse it with one of the following options:
custom code
some HTML parsing framework (i don't know any)
loading the HTML in a hidden UIWebView and doing some Javascript inside with stringByEvaluatingJavaScriptFromString:
I still don't understand exactly what you want, but this is what's possible with urls and html pages:
1) The page can be loaded into Safari. Of course a user can do this if the user has the url. But also a native app can launch Safari and supply Safari with the url of the page to load. A native app cannot however launch Safari and give it the actual html page to load, it must the url.
2) A native app can use UIWebView to either a) download and display a html page given a url or: b) If the html exists on the device, then the html page is given to UIWebView then the UIWebView will display it directly.
3) If the intention is to just extract a bit of text or an image or two from the html and then display it,then search for a few postings/tutorials then you can a) load the html page in a hidden UIWebView and use Javascript to access the dom elements or b) if its xhmlt use an xml parser to extract the html tags you are looking for or c) see if there are html parsing frameworks available for html or d) do a hack and string seach for the html tokens in the html directly.
4) Parse the full HTML and display all its contents yourself. Unless this is a very very simple html, without a full set of features and can't handle javascript etc. etc. Do you have a large team and years free in which to write what would effectively be your own browser.
EDIT:
You still keep talking about parsing as if parsing is the same thing as displaying it.
If you just want to display the http page at the url use UIWebView. The UIWebView will parse it AND display it. There's no need for you to parse it yourself. Or launch Safari from you app (but you won't be able to return to your app afterwards).
You say you can't use UIWebView? Why not?
To actually try and parse and display the HTML page yourself would be madness.
Been searching the net for an example of how to convert HTML string markup into Plain text.
I get my information from a feed which contains HTML, I then display this information in a Text View. does the UITextView have a property to convert HTML or do I have to do it in code. I tried:
NSString *str = [NSString stringWithCString:self.fullText encoding:NSUTF8StringEndcoding];
but doesn't seem to work. Anyone got any ideas?
You can do it by parsing the html by using NSScanner class
- (NSString *)flattenHTML:(NSString *)html {
NSScanner *theScanner;
NSString *text = nil;
theScanner = [NSScanner scannerWithString:html];
while ([theScanner isAtEnd] == NO) {
[theScanner scanUpToString:#"<" intoString:NULL] ;
[theScanner scanUpToString:#">" intoString:&text] ;
html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:#"%#>", text] withString:#""];
}
//
html = [html stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
return html;
}
Hope this helps.
If you are using UIWebView then it will be easier to parse HTML to text:
fullArticle = [webView stringByEvaluatingJavaScriptFromString:#"document.body.getElementsByTagName('article')[0].innerText;"]; // extract the contents by tag
fullArticle = [webView stringByEvaluatingJavaScriptFromString:#"document.body.innerText"]; // extract text inside body part of HTML
you can't do it directly i guess.. however you can use NSXML Parser and parse the HTML and retrieve exactly what you want...
If you need to present the text in read-only fashion, why not use UIWebView?
I am using the NSXMLParser to get new RSS stories from a feed and am displaying them in a UITableView. However now I want to take ONLY the images, and display them in a UIScrollView/UIImageView (3 images side-by side). I am completely lost. I am using the following code to obtain 1 image from a URL.
NSURL *theUrl1=[NSURL URLWithString:#"http://farm3.static.flickr.com/2586/4072164719_0fa5695f59.jpg"];
JImage *photoImage1=[[JImage alloc] init];
[photoImage1 setContentMode:UIViewContentModeScaleAspectFill];
[photoImage1 setFrame:CGRectMake(0, 0, 320, 170)];
[photoImage1 initWithImageAtURL:theUrl1];
[imageView1 addSubview:photoImage1];
[photoImage1 release];
This is all I have accomplished, and it works, for one image, and I have to specify the exact URL. What would you recommend I do to accomplish this?
Further to my other answer, which uses some helper classes and kinda assumes you're storing stuff with Core Data, here's a pure NSXMLParser way to do it.
In this example I'm assuming you have three UIImageViews setup with tags (100,101,102) so we can access them. First off, the code that starts the parser:
// Set the URL with the images, and escape it for creating NSURL
NSString *rssURLString = #"http://feeds.gettyimages.com/channels/RecentEditorialEntertainment.rss";
NSString *escapedURL = [rssURLString stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
NSURL *rssURL = [NSURL URLWithString:escapedURL];
// rssParser is an NSXMLParser instance variable
if (rssParser) [rssParser release];
rssParser = [[NSXMLParser alloc] initWithContentsOfURL:rssURL];
[rssParser setDelegate:self];
success = [rssParser parse]; // return value not used
At this point the parsing starts and NSXMLParser will fire off calls to it's delegate methods as it finds different start and end elements in the XML.
In this example I am only writing the didStartElement method:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
// look for an attribute called url
if ([attributeDict objectForKey:#"url"]) {
currentString = [attributeDict objectForKey:#"url"];
NSLog(#"Image URL: %#", currentString);
NSString* escapedURL = [currentString stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:escapedURL]]];
UIImageView * tmpImageView = (UIImageView*)[scrollView viewWithTag:100+imageCount];
[tmpImageView setImage:image];
NSLog(#"images found: %d", imageCount);
imageCount++;
if (imageCount>2) [rssParser abortParsing];
}
}
Here we look to see if the attributeDict (an NSDictionary object) contains a url attribute. If so, we grab it into currentString and then escape it, just incase it has characters that NSURL will barf on. Then we create an image from that URL and set the appropriate UIImageView image based on the tag numbers. imageCount is a counter; once we've done three images we tell the NSXMLParser to abort parsing the XML.
If your XML puts the URL inside element tags like:
<image>http://example.com/image.jpg</image>
You'll need to do a bit more work with didEndElement and foundCharacters. See the quite excellent Introduction to Event-Driven XML Programming Guide for Cocoa.
I knocked together a quick and dirty app to demo this, you can grab it here.
it sounds like you need to first identify the xml tag that identifies the images in your xml document. you should be able to do this by typing whatever API call you're using into a browser address bar.
once you've done that you can make an array of image urls from the nsxmlparser delegate method that receives new data.
once you have the array of image url's you can do something similar to what you are doing above except that you would use NSURL *theUrl1=[myArray objectAtIndex:...
you can arrange the images just by changing their centre location: image.center = CGPointMake(160,240)..
hope that helps. there are apple docs for nsxmlparser.
You can also try dictionary implementation while fetching data from API call. First you have to identify xml tag that identifies images in xml document, then you can assign each image with its corresponding story as image's key into a dictionary. It will make sure that for particular story only its associated image will be displayed. Then u can use this information later in your application as the requirement varies.
NSMutableDictionary *mutDict = [[NSMutableDictionary allloc]init];
if([elementName isEqualToString:#"story_image"])
{
[mutDict setObject:currentImage forKey:currentStory];
}
I want to suggest you to use JSON instead of xml as it is lightweight data-interchange
format. It would save lot of formatting and effort also.
You can visit this page
http://code.google.com/p/json-frame
It is definitely going to help you.
You have to just download the framework and then use in your application.
To get the live data you have to do same thing as in XMLParsing
NSString *jsonString = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
NSDictionary *JDict = [jsonString JSONValue];
or
NSArray * JArr = [jsonString JSONValue];
depending upon what your data-feed contains.
I've been using NSXMLParser myself and storing the results using CoreData. I use a version of Björn Sållarp's Parser class from his CoreData example code.
My images end up as NSData/Binary in a SQLite database, but they might just as well get put into an array of UIImage for immediate display.
Extract from Parser.m: (from Björn Sållarp)
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if ([elementName isEqualToString:#"imagetag"])
{
UIImage *newImage = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:currentString]]];
NSData *imageData = UIImagePNGRepresentation(newImage);
[currentSearchResult setImage:imageData];
currentString = nil;
return;
}
Called from my view with:
NSString *searchURL = #"http://www.feedurl.com/feed/address/feed.xml";
NSURL *xmlURL = [NSURL URLWithString:searchURL];
Parser *xmlParse = [[Parser alloc] initWithContext:managedObjectContext];
[xmlParse parseXMLFileAtURL:xmlURL parseError:&parseError];
That code assumes your XML document contains image URLs with the tag format:
<imagetag>http://example.com/path/to/image.png</imagetag>
Even if you're not using CoreData, working through the example at that link would be instructional for processing XML with NSXMLParser.
I am new to iphone development .I want parse an image url from a xml file and display it in a RSS feed.There are three image url but i want to retrieve only one url and display it.
<entry>
<id>xxxxx</id>
<title>xxx xxxx xxxx</title>
<content>xxxxxxxxxxx</content>
<media:group>
<media:thumbnail url="http://tiger.jpg"/>
<media:thumbnail url="http://lion.jpg"/>
<media:thumbnail url="http://elephan.jpg"/>
</media:group>
</entry>
for parsing it
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
currentElement = [elementName copy];
if ([elementName isEqualToString:#"entry"]) {
entry = [[NSMutableDictionary alloc] init];
currentTitle = [[NSMutableString alloc] init];
currentDate = [[NSMutableString alloc] init];
NSLog(#"inside image1 ");
}else if([elementName isEqualToString:#"media:thumbnail"])
{
NSString* myUrl = [NSString stringWithString:[attributeDict objectForKey:#"url"]];
}
}.
I want to retrieve only tiger image.Please help me out.Thanks.
In this perticular instance you could set a class variable instead of the current local myUrl and once you get a value in it. In the code below this assumes you never initialize myURL anywhere else.
if (myURL == nil)
myUrl = [attributeDict objectForKey:#"url"];
However this will only work the way you expect if you always want the first thumbnail URL. Unless you have some guarantee (which you haven't mentioned) that you will always want the first URL then there really isn't anything you can do to catch cases when you don't want the first URL since all of the thumbnail URLs tags and attributes are the same save for the URL.