ios - 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)和一对纬度/经度。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

谁的文档状态状态

You can create placemark objects manually for entities for which you already have address information, such as contacts in the Address Book. Creating a placemark object explicitly avoids the need to query the reverse geocoder object for the same information.

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

For a list of strings that you can use for the keys of this dictionary, see the “Address Property” constants in ABPerson Reference. All of the keys in should be at the top level of the dictionary.

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 的基本特征相去甚远:

Accessing the Location Data

• 位置属性

Accessing the Placemark Attributes

• 命名属性
• addressDictionary 属性
• ISOcountryCode 属性
• 国家属性(property)
• 邮政编码属性
• administrativeArea属性
• subAdministrativeArea 属性
• 地方属性(property)
• subLocality属性
• 大道属性(property)
• subThoroughfare 属性
• 区域属性

Accessing Geographic Information

• 内陆水域 Assets
• 海洋属性(property)

Accessing Landmark Information

• areasOfInterest 属性

幸运的是，MKPlacemark 父类(super class)的实际头文件说明了地址字典的一些内容:

// 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，反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，我快结束了。有没有人知道如何创建自己的 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 中:

#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

它看起来很丑，但这是迄今为止我发现的唯一可行的方法。