-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
    NSLog(@"@@@@@@@@@@搜索动作开始向web发请求@@@@@@@@@@");
    [self.searchBar resignFirstResponder];
    NSString *search = searchBar.text;
    NSString *urlString = [@"http://www.webxml.com.cn/WebServices/WeatherWebService.asmx/getWeatherbyCityName?theCityName=" stringByAppendingString:search];
    NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:60.0];
    self.data = [[NSMutableData data]retain];
    [NSURLConnection connectionWithRequest:request delegate:self];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    NSLog(@"@@@@@@@@@@收到Web服务器的响应@@@@@@@@@@");
    [data setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData    *)incomingData{
    NSLog(@"@@@@@@@@@@Web服务器返回的数据如下@@@@@@@@@@");
    NSLog(@"%@",incomingData);
    [data appendData:incomingData];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
    NSLog(@"@@@@@@@@@@对一个XML元素开始解析@@@@@@@@@@");
    NSXMLParser *paser = [[NSXMLParser alloc]initWithData:data];
    [paser setDelegate:self];
    Elements = [NSMutableArray arrayWithCapacity:0];
    [paser parse];
    [paser release];
    [data release];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    NSLog(@"Query failed with error : %@",[error localizedDescription]);
    [data release];
}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict{
    NSLog(@"@@@@@@@@@@对一个XML元素开始解析@@@@@@@@@@");
    Element = @"";
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName{
    NSLog(@"@@@@@@@@@@对一个XML元素完成解析@@@@@@@@@@");
    [Elements addObject:Element];
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
    NSLog(@"@@@@@@@@@@@解析过程中拼接字符串@@@@@@@@@@@@");
    NSLog(@"%@",string);
    Element = [Element stringByAppendingString:string];
}
-(void)parserDidEndDocument:(NSXMLParser *)parser{
    NSLog(@"@@@@@@@@@@@@@@@打印最后的数组@@@@@@@@@@@@@");
    NSLog(@"%@",Elements);
    city.text = [[[Elements objectAtIndex:0] stringByAppendingString:@" "] stringByAppendingString:[Elements objectAtIndex:1]];
    date.text = [Elements objectAtIndex:6];
    detail.text = [[[Elements objectAtIndex:10] stringByAppendingString:@"\n"] stringByAppendingString:[Elements objectAtIndex:11]];
}