- (IBAction)geocodeQuery:(id)sender
{NSString *queryStr = nil;// 从界面文本框输入地址字符串if (_textField.text == nil || [_textField.text length] == 0) {return ;}CLGeocoder *geocoder = [[CLGeocoder alloc] init];[geocoder geocodeAddressString:queryStr completionHandler:^(NSArray *placemarks, NSError *error) {NSLog(@"查询记录数:%i",[placemarks count]);if ([placemarks count] > 0) {CLPlacemark *placemark = [placemarks objectAtIndex:0];CLLocationCoordinate2D coordinate = placemark.location.coordinate;// 生成经纬度字符串NSString *strCoordinate = [NSString stringWithFormat:@"经度：%3.5f,纬度：%3.5f",coordinate.latitude,coordinate.longitude];NSDictionary *addressDict = placemark.addressDictionary;NSString *address = [addressDict objectForKey:(NSString *)kABPersonAddressStreetKey];address = address == nil ? @"" : address;NSString *state = [addressDict objectForKey:(NSString *)kABPersonAddressStateKey];state = state == nil ? @"" : state;NSString *city = [addressDict objectForKey:(NSString *)kABPersonAddressCityKey];city = city == nil ? @"" : city;//  获取地标对应的可读的文字信息，一般返回到UI显示NSString *streetInfo = [NSString stringWithFormat:@"%@\n%@\n%@\n%@\n",strCoordinate,state,address,city];}}];
}

 CLRegion *region = [[CLRegion alloc] initCircularRegionWithCenter:_currLocation.coordinate radius:1000.0f identifier:@"GeocodeRegion"];CLGeocoder *geocoder = [[CLGeocoder alloc] init];[geocoder geocodeAddressString:queryStr inRegion:region completionHandler:^(NSArray *placemarks, NSError *error) {.......}];