[英]How to parse Google weather API using NSXML?
我想使用NSXML解析Google Weather API,所以請為此提供一些指導。
這是我的網址
我已經采取了這樣的步驟:
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");
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[webData setLength: 0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"ERROR with theConenction");
[connection release];
[webData release];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connectio
{
NSLog(@"DONE. Received Bytes: %d", [webData length]);
NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
NSLog(@"thexml=============>%@", theXML);
[theXML release];
if(parser)
{
[parser release];
}
parser = [[NSXMLParser alloc]initWithData:webData];
[parser setDelegate: self];
[parser setShouldResolveExternalEntities: YES];
[parser parse];
[connection release];
[webData release];
}
嗨,如果您的代碼對您完全沒有幫助,則可以獲取此代碼
只是使用這種方法
-(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;
}
還有其他支持方法
-(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];
}
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {if(tmpString == nil &&!didGetHTML){tmpString = [[NSString alloc] initWithString:string]; } else if(!didGetHTML){NSString * t = [NSString stringWithString:tmpString]; if([tmpString keepCount]> 0){[tmpString版本]; tmpString = nil; } tmpString = [[NSString alloc] initWithFormat:@“%@%@”,t,string]; }}
-(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;
}
}
並只需從您編寫該方法的任何類中調用initwith url方法
只是您必須給根標簽對象標簽和特定對象標簽的元素標簽,然后給選擇器,然后在字典中獲取響應,然后將其接受到數組中,並根據您的鍵值顯示結果
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