异步获取地址

/根绝经纬度获取地点信息 - (NSString*)GetAddressByCoordinate:(double)latitude longitude:(double)longitud { NSLog(@"加载eeeeee"); NSString *ld = [[NSString alloc] initWithFormat:@"%f",latitude]; NSString *lt = [[NSString alloc] initWithFormat:@"%f",longitud]; NSString *ldt=[NSString stringWithFormat:@"%@,%@",ld,lt];//[[ld stringByAppendingFormat:@","] stringByAppendingFormat:lt]; NSString *url1=@"http://maps.google.com/maps/api/geocode/json?latlng="; NSString *url2=@"&sensor=true&language=zh-CN"; NSString *urlRequest=[NSString stringWithFormat:@"%@%@%@",url1,ldt,url2];//[[url1 stringByAppendingFormat:ldt] stringByAppendingFormat:url2]; NSLog(@"urlRequest:%@",urlRequest); NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:urlRequest] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; // create the connection with the request // and start loading the data NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection) { // Create the NSMutableData to hold the received data. // receivedData is an instance variable declared elsewhere. receivedData = [[NSMutableData data] retain]; } else { // Inform the user that the connection failed. NSLog(@"fail"); } //NSString *jsonString = [[NSString alloc] // initWithBytes:[receivedData bytes] // length:[receivedData length] // encoding:NSASCIIStringEncoding]; // NSLog(@"jsonString",jsonString); // NSString *jsonString = [[NSString alloc] initWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil]; // NSDictionary * jsonDic = [jsonString JSONValue]; // NSArray *dict = [jsonDic valueForKeyPath:@"results.formatted_address"]; // // NSString *address=[dict objectAtIndex:0]; return @"address"; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // This method is called when the server has determined that it // has enough information to create the NSURLResponse. // It can be called multiple times, for example in the case of a // redirect, so each time we reset the data. // receivedData is an instance variable declared elsewhere. [receivedData setLength:0]; } //接收NSData数据 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Append the new data to receivedData. // receivedData is an instance variable declared elsewhere. [receivedData appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { // release the connection, and the data object [connection release]; // receivedData is declared as a method instance elsewhere [receivedData release]; // inform the user NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription], [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]); } //接收完毕,显示结果 - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"加载次数:dddddd"); NSString *jsonString = [[NSString alloc] initWithBytes:[receivedData bytes] length:[receivedData length] encoding:NSUTF8StringEncoding]; NSLog(@"jsonString",jsonString); //<a href="http://maps.google.com/maps?saddr=">http://maps.google.com/maps?saddr=</a>{%E6%B7%B1%E5%9C%B3}&daddr={%E5%A4%A9%E6%B4%A5} 导航 //NSString *jsonString = [[NSString alloc] initWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil]; NSDictionary * jsonDic = [jsonString JSONValue]; //: format not a string literal and no format arguments //NSDictionary * dict = [jsonDic objectForKey:@"results"];//valueForKeyPath NSArray *dict = [jsonDic valueForKeyPath:@"results.formatted_address"]; NSString *address=[dict objectAtIndex:0]; curAddress=address; [addAnnotation setTitle:@"当前位置"]; [addAnnotation setSubtitle:address]; [connection release]; [receivedData release]; } 系统自带方法 <title/> //MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate ]; // geoCoder.delegate = self; // [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"zh-CN", nil] forKey:@"AppleLanguages"]; // [geoCoder start]; <title/>- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error{ NSLog(@"MKReverseGeocoder has failed."); } - (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark { NSString *address = [NSString stringWithFormat:@"%@ %@ %@ %@ %@%@", placemark.country, placemark.administrativeArea, placemark.locality, placemark.subLocality, placemark.thoroughfare, placemark.subThoroughfare]; NSLog(@"经纬度所对应的详细:%@", address); [addAnnotation setTitle:@"当前位置"]; [addAnnotation setSubtitle:address]; geocoder = nil; }