iOS CoreLocation框架第三章—— CLGeocoder(地理编码器)和CLPlacemark(获取位置信息)

1.使用CLGeocoder可以完成“地理编码”和“反地理编码”

地理编码：根据给定的地名，获得具体的位置信息（比如经纬度、地址的全称等）
反地理编码：根据给定的经纬度，获得具体的位置信息

（1）地理编码方法

　　- (void)geocodeAddressString:(NSString *)addressString completionHandler:(CLGeocodeCompletionHandler)completionHandler;

- (void)geocodeAddressString:(NSString *)addressString inRegion:(nullable CLRegion *)region completionHandler:(CLGeocodeCompletionHandler)completionHandler;

- (void)geocodeAddressDictionary:(NSDictionary *)addressDictionary completionHandler:(CLGeocodeCompletionHandler)completionHandler;

（2）反地理编码方法

　　- (void)reverseGeocodeLocation:(CLLocation *)location completionHandler:(CLGeocodeCompletionHandler)completionHandler;

2.CLGeocodeCompletionHandler

　　当地理\反地理编码完成时，就会调用CLGeocodeCompletionHandler

　　


这个block传递2个参数
error ：当编码出错时（比如编码不出具体的信息）有值
placemarks ：里面装着CLPlacemark对象

3.CLPlacemark

说明：CLPlacemark的字面意思是地标，封装详细的地址位置信息

地理位置 　　　　@property (nonatomic, readonly) CLLocation *location;　　
区域　　　　　　 @property (nonatomic, readonly) CLRegion *region;
详细的地址信息 @property (nonatomic, readonly) NSDictionary *addressDictionary;
地址名称　　　　@property (nonatomic, readonly) NSString *name;
城市　　　　　　@property (nonatomic, readonly) NSString *locality;
国家 @property (nonatomic, readonly, copy, nullable) NSString *country; // eg. United States
海洋 @property (nonatomic, readonly, copy, nullable) NSString *ocean; // eg. Pacific Ocean

@property (nonatomic, readonly, copy, nullable) NSString *thoroughfare; // street name, eg. Infinite Loop
@property (nonatomic, readonly, copy, nullable) NSString *subThoroughfare; // eg. 1

@property (nonatomic, readonly, copy, nullable) NSString *subLocality; // neighborhood, common name, eg. Mission District
@property (nonatomic, readonly, copy, nullable) NSString *administrativeArea; // state, eg. CA
@property (nonatomic, readonly, copy, nullable) NSString *subAdministrativeArea; // county, eg. Santa Clara
@property (nonatomic, readonly, copy, nullable) NSString *postalCode; // zip code, eg. 95014
@property (nonatomic, readonly, copy, nullable) NSString *ISOcountryCode; // eg. US
@property (nonatomic, readonly, copy, nullable) NSString *inlandWater; // eg. Lake Tahoe

@property (nonatomic, readonly, copy, nullable) NSArray<NSString *> *areasOfInterest; // eg. Golden Gate Park