问题描述
我正在使用Yahoo api创建一个小天气应用程序。这个api给了我一个XML文件。
我现在的问题是如何解析这个文件?
这是我到目前为止的代码。
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);
}];
您可以在。
希望有人能帮助我
推荐答案
如果您希望使用NSXMLParser解析XML,则需要一个实现NSXMLParserDelegate的类。你可以使用你的ViewController:
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>
然后使用此协议提供的SAX方法,您可以在运行<$ c $时解析此XML c> [XMLParser parse] 。以下是xml的示例:
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
}
同时获取AFNetworking为了支持您正在使用的RSS xml,我必须按照本网站的说明将application / rss + xml添加到acceptableContentTypes:
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/
希望这有帮助
这篇关于使用AFNetworking解析XML文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!