以编程方式/手动创建 MKPlacemark/CLPlacemark

Question

问题

我有一组地标信息（国家、城市等）和一个纬度/经度对。我想用它来创建一个 MKPlacemark 对象。

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讨论

看来这个类只能由

创建

- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate addressDictionary:(NSDictionary *)addressDictionary

谁的文档声明了

您可以为已拥有地址信息的实体（例如地址簿中的联系人）手动创建地标对象。创建地标对象显式避免了查询反向地理编码器对象以获取相同信息的需要。

完美！我已经进行了反向地理编码，并希望避免这样的查询。我可以在字典中添加什么？

有关可用于此字典键的字符串列表，请参阅 ABPerson 参考中的“地址属性”常量。中的所有键都应位于字典的顶层。

显示相关键

const ABPropertyID kABPersonAddressProperty;
const CFStringRef kABPersonAddressStreetKey;
const CFStringRef kABPersonAddressCityKey;
const CFStringRef kABPersonAddressStateKey;
const CFStringRef kABPersonAddressZIPKey;
const CFStringRef kABPersonAddressCountryKey;
const CFStringRef kABPersonAddressCountryCodeKey;

这与 MKPlacemark 的基本特征相差甚远：

访问位置数据

• 位置属性

访问地标属性

• 命名属性
• addressDictionary 属性
• ISOcountryCode 属性
• 国家财产
• postalCode 属性
• administrativeArea 属性
• subAdministrativeArea 属性
• 位置属性
• subLocality 属性
• 街道物业
• subThoroughfare 属性
• 区域属性

访问地理信息

• 内陆水产
• 海洋地产

访问地标信息

• areasOfInterest 属性

幸运的是，MKPlacemark 超类的实际头文件说明了地址字典：

// address dictionary properties

@property (nonatomic, readonly) NSString *name; // eg. Apple Inc.

@property (nonatomic, readonly) NSString *thoroughfare; // street address, eg. 1 Infinite Loop

@property (nonatomic, readonly) NSString *subThoroughfare; // eg. 1

@property (nonatomic, readonly) NSString *locality; // city, eg. Cupertino

@property (nonatomic, readonly) NSString *subLocality; // neighborhood, common name, eg. Mission District

@property (nonatomic, readonly) NSString *administrativeArea; // state, eg. CA

@property (nonatomic, readonly) NSString *subAdministrativeArea; // county, eg. Santa Clara

@property (nonatomic, readonly) NSString *postalCode; // zip code, eg. 95014

@property (nonatomic, readonly) NSString *ISOcountryCode; // eg. US

@property (nonatomic, readonly) NSString *country; // eg. United States

@property (nonatomic, readonly) NSString *inlandWater; // eg. Lake Tahoe

@property (nonatomic, readonly) NSString *ocean; // eg. Pacific Ocean

@property (nonatomic, readonly) NSArray *areasOfInterest; // eg. Golden Gate Park

所以，我创建了一个字典，然后像这样传递它：

return [[[MKPlacemark alloc] initWithCoordinate:aLocation.coordinate addressDictionary:addressDictionary] autorelease];

不幸的是，毕竟，自省表明信息没有坚持：

NSLog(@"placemark %@ from %@", placemark, addressDictionary);
NSLog(@"has %@", placemark.thoroughfare);

打印

2012-01-31 20:14:22.545 [15450:1403] placemark <+___,-___> +/- 0.00m from {
administrativeArea = __;
postalCode = _____;
subAdministrativeArea = ___;
subThoroughfare = __;
thoroughfare = "_____";
}
2012-01-31 20:14:22.545[15450:1403] has (null)

结论

所以，我快到最后了。有没有人想出如何创建自己的 MKPlacemark？谢谢。

Answer 1

你可以继承MKPlacemark:

在 MyPlacemark.h

@interface MyPlacemark : MKPlacemark

extern NSString * const kCustomPlacemarkAddressThoroughfareKey;
extern NSString * const kCustomPlacemarkAddressSubThoroughfareKey;
extern NSString * const kCustomPlacemarkAddressLocalityKey;
extern NSString * const kCustomPlacemarkAddressSubLocalityKey;
extern NSString * const kCustomPlacemarkAddressAdministrativeAreaKey;
extern NSString * const kCustomPlacemarkAddressSubAdministrativeAreaKey;
extern NSString * const kCustomPlacemarkAddressPostalCodeKey;
extern NSString * const kCustomPlacemarkAddressCountryKey;
extern NSString * const kCustomPlacemarkAddressCountryCodeKey;

@end

在 MyPlacemark.m：

#import "MyPlacemark.h"

@implementation MyPlacemark

NSString * const kCustomPlacemarkAddressThoroughfareKey = @"thoroughfare";
NSString * const kCustomPlacemarkAddressSubThoroughfareKey = @"subThoroughfare";
NSString * const kCustomPlacemarkAddressLocalityKey = @"locality";
NSString * const kCustomPlacemarkAddressSubLocalityKey = @"subLocality";
NSString * const kCustomPlacemarkAddressAdministrativeAreaKey = @"administrativeArea";
NSString * const kCustomPlacemarkAddressSubAdministrativeAreaKey = @"subAdministrativeArea";
NSString * const kCustomPlacemarkAddressPostalCodeKey = @"postalCode";
NSString * const kCustomPlacemarkAddressCountryKey = @"country";
NSString * const kCustomPlacemarkAddressCountryCodeKey = @"countryCode";

- (NSString *)thoroughfare
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressThoroughfareKey];
}

- (NSString *)subThoroughfare
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressSubThoroughfareKey];
}

- (NSString *)locality
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressLocalityKey];
}

- (NSString *)subLocality
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressSubLocalityKey];
}

- (NSString *)administrativeArea
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressAdministrativeAreaKey];
}

- (NSString *)subAdministrativeArea
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressSubAdministrativeAreaKey];
}

- (NSString *)postalCode
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressPostalCodeKey];
}

- (NSString *)country
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressCountryKey];    
}

- (NSString *)countryCode
{
    return [self.addressDictionary objectForKey:kCustomPlacemarkAddressCountryCodeKey];
}

@end

它看起来很难看，但这是迄今为止我发现的唯一可行的方法。