iphone - CLPlacemark的“名称”

我试图了解CLPlacemark以及何时/如何为添加到地图的图钉标注创建信息。在几年前我在More iOS 3开发中阅读之前，他们对地址进行反向地理编码并构建了该地址（街道，邮政编码，州等）。首先，我需要自己构建此字符串吗？我试图找出如何获取某些已知事物的位置名称，例如在下面的代码中搜索苹果商店：

NSString *address = @"1 stockton, san francisco, ca";
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
        [geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {

    [placemarks enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        NSLog(@"obj description: %@", [obj description]);

        CLPlacemark *aPlacemark = (CLPlacemark *)obj;
        NSLog(@"%@", [aPlacemark.addressDictionary description]);
        NSLog(@"name: %@", ((CLPlacemark *)obj).name);
    }];
];

当我打印出描述时，我看到控制台显示：

Apple Store, San Francisco, 1 Stockton St, San Francisco, CA  94108-5805, United States @ <+37.78584545,-122.40651752> +/- 100.00m, region (identifier <+37.78584545,-122.40652161> radius 18.96) <+37.78584545,-122.40652161> radius 18.96m

它在哪里获得旧金山Apple Store的名称？我认为这将是CLPlacemark.name属性，但这是null。因此，在尝试弄清如何创建name属性时，我发现：

        NSLog(@"%@", [aPlacemark.addressDictionary description]);

我得到的输出：

City = "San Francisco";
Country = "United States";
CountryCode = US;
FormattedAddressLines =     (
    "Apple Store, San Francisco",
    "1 Stockton St",
    "San Francisco, CA  94108-5805",
    "United States"
);
PostCodeExtension = 5805;
State = California;
Street = "1 Stockton St";
SubAdministrativeArea = "San Francisco";
SubLocality = "Union Square";
SubThoroughfare = 1;
Thoroughfare = "Stockton St";
ZIP = 94108;

由此可见，在addressDictionary的FormattedAddressLines键中，标题也在那里。

所以我想我的两个问题是：

1）如果有一个位置（即Apple Store），如何获取位置名称？

2）我是否需要构建我的字符串，因为地址字典似乎已经对我有用了？

谢谢！

最佳答案

要回答您的第一个问题，请使用CLPlacemark的areasOfInterest属性。

至于第二个问题，那完全取决于您，以及如何格式化字符串。如果要使用addressDictionary属性中的字符串来构建它，则一定要这样做。您可以选择零件，并在完成处理程序中全部创建一个字符串。

另外，您提到要创建一个注释以显示在地图上。我个人继承了MKAnnotation的子类，并使用它来快速创建要显示在地图上的注释。

MyAnnotation.h

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>

@interface MyAnnotation : NSObject <MKAnnotation> {
    NSString *_name;
    NSString *_address;
    CLLocationCoordinate2D _coordinate;
}

@property (copy) NSString *name;
@property (copy) NSString *address;
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

- (id)initWithName:(NSString*)name address:(NSString*)address coordinate:(CLLocationCoordinate2D)coordinate;

@end

MyAnnotation.m

#import "MyAnnotation.h"

@implementation MyAnnotation
@synthesize name = _name;
@synthesize address = _address;
@synthesize coordinate = _coordinate;

- (id)initWithName:(NSString*)name address:(NSString*)address coordinate:(CLLocationCoordinate2D)coordinate
{
    if ((self = [super init])) {
        _name = [name copy];
        _address = [address copy];
        _coordinate = coordinate;
    }
    return self;
}

- (NSString *)title
{
    return _name;
}

- (NSString *)subtitle
{
    return _address;
}

@end

声明一个NSMutableArray来保存所有注释，并在完成处理程序中放入initWithName:address:coordinate:，您可以快速获取可以添加到地图的注释数组。

NSString *address = @"1 stockton, san francisco, ca";
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error)
{
   NSMutableArray *annotationArray = [NSMutableArray array];
   for (CLPlacemark *aPlacemark in placemarks)
   {
      NSString *nameString = // Get your name from an array created by aPlacemark.areasOfInterest;
      NSString *addressString = // Put your address string info you get from the placemark here.
      CLLocationCoordinate2D coordinate = aPlacemark.location.coordinate;
      MyAnnotation *annotation = [[MyAnnotation alloc] initWithName:nameString address:addressString coordinate:coordinate];
      [annotationArray addObject:annotation];
   }
   // Now save annotationArray if you want to use it later
   // Add it to your MapView with [myMapView addAnnotations:annotationArray];
}];

希望有帮助！