Ios 无法筛选google地图

我试图将google places auto complete限制在印度，但无法进行筛选，请有人提供帮助。
我的谷歌地图框架， #进口

     GMS_ASSUME_NONNULL_BEGIN

        /**
     * The type filters that may be applied to an autocomplete request to          restrict results to different
      * types.
     */
        typedef NS_ENUM(NSInteger, GMSPlacesAutocompleteTypeFilter) {
     /**
      * All results.
     */
    kGMSPlacesAutocompleteTypeFilterNoFilter,
    /**
   * Geeocoding results, as opposed to business results.
   */
    kGMSPlacesAutocompleteTypeFilterGeocode,
    /**
   * Geocoding results with a precise address.
   */
       kGMSPlacesAutocompleteTypeFilterAddress,
     /**
    * Business results.
   */
     kGMSPlacesAutocompleteTypeFilterEstablishment,

     /**
   * Results that match the following types:
   * "locality",
   * "sublocality"
   * "postal_code",
   * "country",
   * "administrative_area_level_1",
   * "administrative_area_level_2"
   */
  kGMSPlacesAutocompleteTypeFilterRegion,
  /**
   * Results that match the following types:
   * "locality",
   * "administrative_area_level_3"
   */
  kGMSPlacesAutocompleteTypeFilterCity,
};

/**
 * This class represents a set of restrictions that may be applied to autocomplete requests. This
 * allows customization of autocomplete suggestions to only those places that are of interest.
 */
@interface GMSAutocompleteFilter : NSObject

/**
 * The type filter applied to an autocomplete request to restrict results to different types.
 * Default value is kGMSPlacesAutocompleteTypeFilterNoFilter.
 */
@property(nonatomic, assign) GMSPlacesAutocompleteTypeFilter type;

/**
 * The country to restrict results to. This should be a ISO 3166-1 Alpha-2 country code (case
 * insensitive). If nil, no country filtering will take place.
 */
@property(nonatomic, copy) NSString *GMS_NULLABLE_PTR INDIA;


@end

GMS_ASSUME_NONNULL_END

---

我试图限制谷歌的地方自动完成到印度，但无法过滤，请有人建议帮助

来自文档：

- (NSString* _Nullable) country [read, write, copy]

该国将限制选举结果

这应该是ISO 3166-1 Alpha-2国家代码（不区分大小写）。如果为零，则不会进行国家/地区筛选

对于印度，你应该：

  yourFilter.country =@"IN";

这是国家名单