Iphone 如何使用NSXML解析googleweatherapi？

我想用NSXML解析google weather API，所以请给我一些指导

这是

我已经采取了这样的措施：

NSURL *url = [NSURL URLWithString:@"http://www.google.com/ig/api?weather=Ahemdabad"];

 NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
 [theRequest setHTTPMethod:@"POST"];
 NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

 if(theConnection){
  webData = [[NSMutableData data] retain];
  NSLog( @"connection established");
 }
 else {
  NSLog(@"theConnection is NULL");
 }

---

嘿，ankit，你可以得到这个代码，如果它对你有帮助的话，不需要建立连接

就用这个方法

-(id)initWithURL:(NSURL*)url arrayRootObjectTags:(NSArray*)arrTags sel:(SEL)seletor andHandler:(NSObject*)handler{
    if(self = [super init] ){
        self.mainArray=arrTags;
        self.MainHandler=handler;
        self.targetSelector=seletor;
        NSLog(@"%@",[url description]);
        NSURLRequest *req=[NSURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageNotAllowed timeoutInterval:30];                 
        con=[[NSURLConnection alloc] initWithRequest:req delegate:self];
        if(con){
            myWebData=[[NSMutableData data] retain];
        } else {
            [MainHandler performSelector:@selector(targetSelector:) withObject:nil];
        }
    }
    return self;
}

还有另一种支撑方法

-(void)parser:(NSXMLParser*)parser didStartElement:(NSString*)elementName namespaceURI:(NSString*)namespaceURI qualifiedName:(NSString*)qualifiedName attributes:(NSDictionary*)attributeDict {
    if([elementName isEqualToString:@"html"] || [elementName isEqualToString:@"HTML"]){
        didGetHTML=YES; [self parserDidEndDocument:parser];
    } else if([[mainArray objectAtIndex:0] isEqualToString:elementName] && [[mainArray objectAtIndex:1] isEqualToString:elementName] && !didGetHTML) {
        objectsArray=[[NSMutableArray alloc] init];
        tmpD=[[NSMutableDictionary alloc] init];
        if(tmpOther==nil) tmpOther=[[NSMutableDictionary alloc] init];      
    } else if([[mainArray objectAtIndex:0] isEqualToString:elementName] && !didGetHTML ) {
        objectsArray=[[NSMutableArray alloc] init];
        if(tmpOther==nil) tmpOther=[[NSMutableDictionary alloc] init];      
    } else if([[mainArray objectAtIndex:1] isEqualToString:elementName] && !didGetHTML ) {
        tmpD=[[NSMutableDictionary alloc] init];
    } else if([mainArray containsObject:elementName] && !didGetHTML){
        [tmpD setValue:[attributeDict valueForKey:@"data"] forKey:elementName];
    }
}

-voidparser:NSXMLParser*解析器foundCharacters:NSString*字符串{ iftmpString==nil&&！didGetHTML{ tmpString=[[NSString alloc]initWithString:string]； }否则，如果！didGetHTML{ NSString*t=[nsstringwithstring:tmpString]； 如果[tmpString retainCount]>0{[tmpString release]；tmpString=nil；} tmpString=[[NSString alloc]initWithFormat:@%@%@，t，string]； } }

只需调用initWithURL方法，您就可以从该类编写此方法

-(id)initWithURL:(NSURL*)url arrayRootObjectTags:(NSArray*)arrTags sel:(SEL)seletor andHandler:(NSObject*)handler{
    if(self = [super init] ){
        self.mainArray=arrTags;
        self.MainHandler=handler;
        self.targetSelector=seletor;
        NSLog(@"%@",[url description]);
        NSURLRequest *req=[NSURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageNotAllowed timeoutInterval:30];                 
        con=[[NSURLConnection alloc] initWithRequest:req delegate:self];
        if(con){
            myWebData=[[NSMutableData data] retain];
        } else {
            [MainHandler performSelector:@selector(targetSelector:) withObject:nil];
        }
    }
    return self;
}

您只需给出特定对象标记的根标记object tag和element tag，还需要给出选择器，然后在dictionary中获取响应，他们在数组中获取响应，并根据键的值显示结果

Google weather API于2012年关闭->

-(void)parser:(NSXMLParser*)parser didEndElement:(NSString*)elementName namespaceURI:(NSString*)namespaceURI qualifiedName:(NSString*)qualifiedName {
    if([[mainArray objectAtIndex:0] isEqualToString:elementName] && [[mainArray objectAtIndex:1] isEqualToString:elementName] && !didGetHTML){
        [objectsArray addObject:tmpD];
    } else if([elementName isEqualToString:[mainArray objectAtIndex:1]] && !didGetHTML){
        [objectsArray addObject:tmpD];
        [tmpD release]; tmpD=nil;
    } else if([mainArray containsObject:elementName] && !didGetHTML) {
        if(![tmpD valueForKey:elementName]){
            [tmpD setValue:tmpString forKey:elementName];
        }
        [tmpString release]; tmpString=nil;     
    } else {
        [tmpOther setValue:tmpString forKey:elementName];
        [tmpString release]; tmpString=nil;
    }
}