I am making a little weather app using the Yahoo api. This api gives me an XML file back. My problem is now how I can parse this file ? Here is my code that I have so far.
AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) { NSLog(@"success"); XMLParser.delegate = self; [XMLParser parse]; NSLog(@"xmlParser is %@",XMLParser); } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser *XMLParser) { NSLog(@"failure with error %@",error); }];
You can find the XML file over here.
Hope that anybody can help me
If you are looking to parse XMLs using NSXMLParser you'll need to have a class that implements the NSXMLParserDelegate. You can use your ViewController for this:
@interface ViewController : UIViewController <NSXMLParserDelegate>
Then using the SAX methods provided by this protocol you can parse this XML when you run [XMLParser parse]. Here is an example for your xml:
- (IBAction) makeRequest:(id)sender { NSLog(@"Making request"); NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://weather.yahooapis.com/forecastrss?w=2442047&u=c"]]; AFXMLRequestOperation *operation = [AFXMLRequestOperation XMLParserRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) { XMLParser.delegate = self; [XMLParser parse]; } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser *XMLParser) { NSLog(@"failure with error %@",error); }]; [operation start]; } #pragma mark - Parsing lifecycle - (void)startTheParsingProcess:(NSData *)parserData { NSXMLParser *parser = [[NSXMLParser alloc] initWithData:parserData]; //parserData passed to NSXMLParser delegate which starts the parsing process [parser setDelegate:self]; [parser parse]; // starts the event-driven parsing operation. } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { if ([elementName isEqualToString:@"yweather:astronomy"]) { NSLog(@"Sunrise: %@, Sunset: %@", [attributeDict valueForKey:@"sunrise"], [attributeDict valueForKey:@"sunset"]); } } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{ self.tmpInnerTagText = string; // Make a temp NSString to store the text in-between tags } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:@"title"]) { NSLog(@"%@", self.tmpInnerTagText); } if ([elementName isEqualToString:@"description"]) { NSLog(@"%@", self.tmpInnerTagText); } } - (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError { NSLog(@"Paser Error = %@", parseError); //TODO: Create Alert message error }
Also to get AFNetworking to support the RSS xml you are using I had to add "application/rss+xml" to the acceptableContentTypes following the instructions from this site: http://www.suushmedia.com/simple-rss-reader-with-afnetworking/
Hope this helps
Better Solution: I found here
NSPropertyListFormat format; NSArray *myObjects = [NSPropertyListSerialization propertyListWithData:responseObject options:NSPropertyListMutableContainers format:&format error:NULL]; //If the root object of the plist is dictionary NSDictionary *myObjects = [NSPropertyListSerialization propertyListWithData:responseObject options:NSPropertyListMutableContainers format:&format error:NULL];
