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NSXMLParser 및 Geonames

2010-06-03 4 views
1

iPhone SDK에서 NSXMLParser를 사용하여 Geonames에서 호출을 구문 분석하려고합니다. 나는 이것을 전에 사용했지만 어떤 이유로 웹 브라우저에서 다시 결과를 얻었지만 빈 사전을 다시 얻는다. 누군가 내가 잘못하고있는 것을 지적 해 주실 수 있습니까?NSXMLParser 및 Geonames

아래 코드는 내가 사용하고있는 코드와 다시 브라우저에 붙여 넣는 결과입니다. 당신이있어

<?xml version="1.0" encoding="UTF-8" standalone="no"?> 
<geonames> 
<totalResultsCount>2808</totalResultsCount> 
<code> 
<postalcode>02101</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.370567</lat> 
<lng>-71.026964</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02108</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.357603</lat> 
<lng>-71.068432</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02109</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.360027</lat> 
<lng>-71.054495</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02110</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.357636</lat> 
<lng>-71.051417</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02111</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.350348</lat> 
<lng>-71.0629</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02114</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.361111</lat> 
<lng>-71.06823</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02115</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.342706</lat> 
<lng>-71.092215</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02116</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.349201</lat> 
<lng>-71.076798</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02118</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.336162</lat> 
<lng>-71.072854</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02128</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.364197</lat> 
<lng>-71.025694</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02199</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.347873</lat> 
<lng>-71.082543</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02210</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.348921</lat> 
<lng>-71.046511</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02215</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.347088</lat> 
<lng>-71.102689</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>22713</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>38.538241</lat> 
<lng>-78.142285</lng> 
<adminCode1>VA</adminCode1> 
<adminName1>Virginia</adminName1> 
<adminCode2>047</adminCode2> 
<adminName2>Culpeper</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>24592</postalcode> 
<name>South Boston</name> 
<countryCode>US</countryCode> 
<lat>36.696335</lat> 
<lng>-78.918829</lng> 
<adminCode1>VA</adminCode1> 
<adminName1>Virginia</adminName1> 
<adminCode2>083</adminCode2> 
<adminName2>Halifax</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02102</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.338947</lat> 
<lng>-70.919635</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02103</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.338947</lat> 
<lng>-70.919635</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02104</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.338947</lat> 
<lng>-70.919635</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02105</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.338947</lat> 
<lng>-70.919635</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
<code> 
<postalcode>02106</postalcode> 
<name>Boston</name> 
<countryCode>US</countryCode> 
<lat>42.354318</lat> 
<lng>-71.073449</lng> 
<adminCode1>MA</adminCode1> 
<adminName1>Massachusetts</adminName1> 
<adminCode2>025</adminCode2> 
<adminName2>Suffolk</adminName2> 
<adminCode3/> 
<adminName3/> 
</code> 
</geonames>

출처

2010-06-03 Xcoder

답변

1

: 아래

#pragma mark - 
#pragma mark - Parcer Services 

-(void)beginLoadingFeed{ 
//[self startLoadingWithMessage:@"Loading Results...."]; 
NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(loadFeed) object:nil]; 
[operationQueue addOperation:operation]; 
[operation release]; 
} 

- (void)loadFeed{ 
NSString *path = [NSString stringWithFormat:@"http://ws.geonames.org/postalCodeSearch?placename=%@&long&maxRows=20",self.location]; 
[Logger log:@"Geonames Query: %@",path]; 
[self parseXMLFileAtURL:path]; 
[self performSelectorOnMainThread:@selector(didfinishedLoadingFeed) withObject:nil waitUntilDone:YES]; 
} 

-(void)didfinishedLoadingFeed{ 

} 

- (void)parserDidStartDocument:(NSXMLParser *)parser{ 
[Logger log:@"found file and started parsing"]; 
} 


//Called when the parser runs into an open tag (<tag>) 
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { 

if ([elementName isEqualToString:@"code"]) { 
    currentResult = [NSMutableDictionary dictionary]; 
} else { 
    currentElement = [elementName copy]; 
} 

} 

//This is just to resolve random HTML entities 
- (NSData *)parser:(NSXMLParser *)parser resolveExternalEntityName:(NSString *)entityName systemID:(NSString *)systemID { 
return [entityName dataUsingEncoding:NSASCIIStringEncoding]; 
} 


- (void)parseXMLFileAtURL:(NSString *)URL{ 
self.results = [[[NSMutableArray alloc] init] autorelease]; 
NSURL *xmlURL = [NSURL URLWithString:URL]; 
NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; 
[parser setDelegate:self]; 
[parser parse]; 
[parser autorelease]; 
} 

- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError { 
NSString * errorString = [NSString stringWithFormat:@"Unable to connect to web site (Error code %i)", [parseError code]]; 
[Logger log:@"error parsing : %@", errorString]; 
[self stopLoadingView]; 
[self showMessage:@"Error loading content" withTitle:@"Error Loading"]; 
} 



/*** Called when the parser runs into a close tag (</tag>). If it is the Result tag that is closing, we should add the currentResult to the array, and then forget about it ***/ 
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { 
if ([elementName isEqualToString:@"code"]) { 
    [self.results addObject:currentResult]; 
    currentResult = nil; 
} 
} 


- (void)parserDidEndDocument:(NSXMLParser *)parser { 
[Logger log:@"all done!"]; 
[Logger log:@"results array has %d items", [self.results count]]; 
[Logger log:@"Results:%@",results]; 
[theTableView reloadData]; 
[self stopLoadingView]; 
}

사전에

덕분에 용어 "보스턴"에 대한 검색을 수행 할 때 위와 같은 호출을 사용하여 브라우저에서 돌아 오는 결과입니다 currentResult에 결코 데이터가 주어지지 않기 때문에 널 사전을 얻습니다. didStartElement 및 didEndElement 방법은 실제로 <foo>bar</foo> 태그 안에있는 내용을 제공하지 않습니다.

요소의 실제 내용을 가져 오려면 - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string 메서드를 사용하십시오.

출처

2010-06-04 06:34:59

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