I am have rss page from wether site.
<item>
<title>Запорожье: Вечер 03 Mar, Sun</title>
<link>http://www.gismeteo.ru/city/daily/5093/?462419</link>
<description>Облачно, температура 1..3 С, давление 753..755 мм рт.ст., ветер Юго-Западный, 6 м/с</description>
<category>Погода</category>
<enclosure url="http://img.gismeteo.ru/images/icons/new/d.sun.c2.png" length="2000" type="image/gif" />
<source url="http://informer.gismeteo.ru/rss/34601.xml">GISMETEO.RU: Погода в г. Запорожье</source>
<guid>418461</guid>
</item>
It is my code
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if([elementName isEqualToString:#"title"]){
xmlStringFileObject.titleString = nodecontent;
}
else if([elementName isEqualToString:#"description"]){
xmlStringFileObject.descriptionString = nodecontent;
}
else if([elementName isEqualToString:#"category"])
{
self.xmlStringFileObject.categoryString = nodecontent;
}
if([elementName isEqualToString:#"item"])
{
[outputData addObject:xmlStringFileObject];
}
nodecontent=[[NSMutableString alloc]init];
}
It works good but i cant parsing image and load him to UIImageView
I need a parsing image from this
<enclosure url="http://img.gismeteo.ru/images/icons/new/d.sun.c2.png" length="2000" type="image/gif" />. Help me please.
Look how i did it
NSString* imageURL = urlString; //http://img.gismeteo.ru/images/icons/new/d.sun.c2.png
NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:imageURL]];
UIImage *img = [[UIImage alloc] initWithData:imageData];Or you do not know how to get url string from xml?
UIImageView *imageView = [[UIImageView alloc] initWithImage:img];
Or you do not know how to get url string from xml?
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
if([elementName isEqualToString:#"source"])
NSString *urlString = [attributeDict objectForKey:#"url"];
}
Related
I am trying NSXMLParser for getting values from an XML for first time. But I have a problem.
Below my XML:
<Library>
<Book>
<ID>1</ID>
<TITLE>Test</TITLE>
</Book>
</Library>
and parser code:
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *) elementName namespaceURI:(NSString *)namespaceURI qualifiedNam(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if([elementName isEqualToString:#"Book"])
{
NSLog(#"%#", [attributeDict valueForKey:#"ID"]);
}
}
The result ID is null. Can you help me please?
Unfortunately, NSXMLParser doesn't work this way. It traverses over the elements in XML in document order, so by the time the "Book" element starts, it hasn't reached the "ID" element yet. Your code would work if the XML looked like
<Book Id="1">
...
</Book>
but I suppose you have no control over the XML. Then you need a more sophisticated solution. I believe the following would work:
Add these instance variables
NSString *currentElement, *bookID, *bookTitle;
NSMutableString *elementValue;
Implement the following methods:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *) elementName namespaceURI:(NSString *)namespaceURI qualifiedNam(NSString *)qName attributes:(NSDictionary *)attributeDict {
currentElement = elementName;
elementValue = nil;
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
// Append characters to element value
if (!elementValue) elementValue = [NSMutableString stringWithCapacity:100];
[elementValue appendString:string];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName {
if ([#"Id" isEqualToString:elementName]) {
bookID = [elementValue copy];
} else if ([#"Title" isEqualToString:elementName]) {
bookTitle = [elementValue copy];
} else if ([#"Book" isEqualToString:elementName]) {
// end of Book element, do something with bookID and bookTitle
}
}
Follow the below code.You will understand.
In your .h part
//Step 1 : Add the Delegate classes
First of all you should add <NSXMLParserDelegate>
//Step 2 : Create necessary objects
NSXMLParser *parser;
NSMutableData *ReceviedData;
NSMutableString *currentStringValue;
NSMutableArray *arrayID;
In your .m part
//Step 3 - Allocate your all Arrays in your viewDidLoad method
arrayId = [NSMutableArray alloc]init];
//Step 4 - Create Connection in your viewDidLoad Like
[self createConnection:#"http://www.google.com"];//give your valid url.
-(void)createConnection:(NSString *)urlString
{
NSURL *url = [NSURL URLWithString:urlString];
//Step 5 - parser delegate methods are using NSURLConnectionDelegate class or not.
BOOL success;
if (!parser)
{
parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
parser.delegate = self;
parser.shouldResolveExternalEntities = YES;
success = [parser parse];
NSLog(#"Success : %c",success);
}
}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
NSLog(#"Current Element Name : %#",elementName);
if ([elementName isEqualToString:#"ID"])
{
NSLog(#"The Result is==%#",elementName);
}
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
currentStringValue = [[NSMutableString alloc] initWithString:string];
NSLog(#"Current String Value : %#",currentStringValue);
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if ([elementName isEqualToString:#"ID"])
{
[arrayResult addObject:currentStringValue];
}
currentStringValue = nil;
}
I have written the below code to parse RSS feeds. but i keep getting EXC_BAD_ACCESS in foundCharacter method when it tries to compare element with #"title".Any idea where am i going wrong?
NSMutableDictionary * item;
NSMutableString * title;
NSMutableString * link;
NSString *element;
NSMutableArray *feeds;
-(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];
}
}
-(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"];
[feeds addObject:[item copy]];
NSLog(#"feeds :: %#",feeds);
}
}
-(void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
if ([element isEqualToString:#"title"]) {
[title appendString:string];`enter code here`
}else if ([element isEqualToString:#"link"]){
[link appendString:string];
}
}
I think the mistake is in this line:
element = elementName;
You have to init the variable element. So write this one:
element = [[NSString alloc] initWithString:elementName];
Then it should work.
I am making an app for my site, which I need to include images in the table view.
RSS picture I'm trying to find:
<description>
<![CDATA[
<img width="1100" height="1010" src="http://www.x86cam.com/wp-content/uploads/2013/11/twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u.png" class="attachment- wp-post-image" alt="twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u" style="display: none" />I will not give any links, but I just need to warn y’all. Watch out for spoilers all over sites. Source: Here
]]>
</description>
I don't know how I would find the image tag in this.
#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];
image = [[NSMutableString alloc] init];
pubDate = [[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"];
[item setObject:pubDate forKey:#"pubDate"];
[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];
}else if ([element isEqualToString:#"pubDate"]){
[pubDate appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
I would like the app to parse the XML and find the <img> tag in the <description> and then get the src=""
Anyone willing and able to help me on this?
The image link your are looking to extract is inside a CDATA block, but rss parser ignores CDATA block.
If you need to extract the string from CDATA, you could use this block in foundCDATA:
- (void)parser:(NSXMLParser *)parser foundCDATA:(NSData *)CDATABlock
{
NSMutableString *cdstring = [[NSMutableString alloc] initWithData:CDATABlock encoding:NSUTF8StringEncoding];
}
now the mutablestring "cdstring" will be containing:
"img width="1100" height="1010" src="http://www.x86cam.com/wp-content/uploads/2013/11/twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u.png" class="attachment- wp-post-image" alt="twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u" style="display: none" />I will not give any links, but I just need to warn y’all. Watch out for spoilers all over sites. Source: Here"
now just search for src=" using stringcontainsstring and extract the link
-cheers :)
P.S: if you can ask the provider of rss feed to give it in normal block without CDATA, you can extract the link easily by using following method:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes: (NSDictionary *)attributeDict
// In this method parameter 'attributeDict' will return you all the sub attributes of main attribute.
// In your case its 'url' of Picture.
// I hope this will help you. Check this out.
if ([element isEqualToString:#"img"]){
[attributeDict valueForKey:<#"src">]
}
Hope it helps
I have some difficulties to understand how to use NSXMLParser despite all the tutos I've watched...
I have the following XML file with for example :
<rss>
<channel>
<title>The Title</title>
<link>A URL</link>
<language>English</language>
<item>
<name>John</name>
<title>John4034</title>
<city>LA</city>
<country>USA</country>
</item>
....
<item>
<name>Marc</name>
<title>Marc2942</title>
<city>London</city>
<country>England</country>
</item>
</channel>
</rss>
I aim to stock all the items in a NSMutableArray of Item. My class Item has 4 NSString (name, title, city, country).
Here is my XMLParser.m file :
- (id) loadXMLbyURL : (NSString *) urlString
{
items = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:urlString];
NSData *data = [NSData dataWithContentsOfURL:url];
parser = [[NSXMLParser alloc] initWithData:data];
parser.delegate = self;
[parser parse];
return self;
}
- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
currentNodeContent = (NSMutableString *) [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}
- (void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if([elementName isEqualToString:#"item"]) currentItem = [Item alloc];
}
- (void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if([elementName isEqualToString:#"name"]) [currentItem setName:currentNodeContent];
if([elementName isEqualToString:#"title"]) [currentItem setTitle:currentNodeContent];
if([elementName isEqualToString:#"city"]) [currentItem setCity:currentNodeContent];
if([elementName isEqualToString:#"country"]) [currentItem setCountry:currentNodeContent];
}
if([elementName isEqualToString:#"item"])
{
[self.items addObject:currentItem];
currentItem = nil;
currentNodeContent = nil;
}
}
But with all this, I have 2 issues :
My array of items only contains 108 indexes whereas my XML file got 299.
I've no data in my items properties... everything is (null) when I try to print it in the log.
Please help !
If anybody has the same problem, I finally found the solution.
The problem of non-checking all the XML file was because of a PCDATA error in the XML file.
The problem of getting nothing in the NSStrings has been solved in this thread : NSXMLParser issue : don't get all data?
I want to get the updates from a website based on the titles and links which is in xml format.
I have tried with the code below but it's not working. In console it is showing the message:
2011-11-03 14:45:05.987 tabbar[673:e903] * Terminating app due to
uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFString
isEqualtostring:]: unrecognized selector sent to instance 0x5746830'
If I run again, the table view is loading but there is no data in the table cells.
It is showing this message at the line if ([elementName isEqualtostring:#"item"]):
program received signal SIGABRT
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
classelement = elementName;
if ([elementName isEqualtostring:#"item"])
{
itemselected = YES;
multitle = [[NSMutableString alloc]init];
mullink = [[NSMutableString alloc]init];
}
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedname:(NSString *)qName
{
if ([elementName isEqualToString:#"item"])
{
itemselected = NO;
[titlearray addObject:multitle];
[linkarray addObject:mullink];
[multitle release];
[mullink release];
[self.tbl reloadData];
}
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
if (itemselected)
{
if ([classelement isEqualToString:#"title"])
{
NSLog(#"%#",string);
[multitle appendString:multitle];
}
else if([classelement isEqualToString:#"link"])
{
[multitle appendString:string];
}
}
}
If you are reading directly from a website more than likely you are getting "invalid" characters. As soon as the parser see's these invalid characters it will crash. I would suggest looking at using "HPPLE Parser". It works much better and wont crash if invalid characters come in.
Hpple information here: http://blog.objectgraph.com/index.php/2010/02/24/parsing-html-iphone-development/
Finally I got it. What I did is I have taken two NSMutableArrays and two NSMutableStrings and I appended the items to the strings, and later those strings I appended to the two arrays.
(void)viewDidLoad
{
titlearray = [[NSMutableArray alloc]init];
linkarray = [[NSMutableArray alloc]init];
NSString *rssaddress =#"http://www.greenday.com/rss";
NSURL *url = [NSURL URLWithString:rssaddress];
xmlparser = [[NSXMLParser alloc]initWithContentsOfURL:url];
[xmlparser setDelegate:self];
[xmlparser parse];
[super viewDidLoad];
}
(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
classelement = elementName;
if([elementName isEqualToString:#"item" ])
{
itemselected = YES;
titlestrng = [[NSMutableString alloc]init];
linkstrng = [[NSMutableString alloc]init];
}
}
(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if([elementName isEqualToString:#"item" ])
{
itemselected = NO;
[titlearray addObject:titlestrng];
[linkarray addObject:linkstrng];
[titlestrng release];
[linkstrng release];
[self.tb reloadData];
}
}
(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
if(itemselected)
{
if([classelement isEqualToString:#"title"])
{
[titlestrng appendString: string];
NSLog(#"%#",titlestrng);
}
else if ([classelement isEqualToString:#"link"])
{
[linkstrng appendString:string];
NSLog(#"%#",linkstrng);
}
}
}