/** *只显示省份一级 *provinceBlock:回调省份 */ (instancetype)provincePickerViewWithProvinceBlock:(void(^)(NSString*province))provinceBlock; /** *显示省份和市级 *cityBlock:回调省份和城市 */ (instancetype)cityPickerViewWithCityBlock:(void(^)(NSString*province,NSString*city))cityBlock; /** *显示省份和市级和区域