地理编码/反地理编码(Obj-C)

Geocoder
地理编码 : 人文信息转化为地理信息的过程
反地理编码 : 地理信息转换为人文信息的过程

• 地理编码步骤:
  1.创建地理编码者 (CLGeocoder)
  2.地理编码 geocodeAddress...

• 反地理编码步骤:
  1.创建地理编码者(CLGeocoder)
  2.地理信息转位置对象
  3.反地理编码取值 reverseGeocodeLocation

• 地理编码 简单界面搭建:

geocoder.png

#import "GeocoderViewController.h"
#import 

@interface GeocoderViewController ()
// 地址输入框
@property (weak, nonatomic) IBOutlet UITextField *address_TF;
// 纬度文本
@property (weak, nonatomic) IBOutlet UILabel *latitude_Label;
// 经度文本
@property (weak, nonatomic) IBOutlet UILabel *longitude_Label;
// 详情文本
@property (weak, nonatomic) IBOutlet UILabel *detail_Label;

@end

@implementation GeocoderViewController

- (IBAction)geocoderBtnClick:(id)sender {
    
    // 创建地理编码者
    CLGeocoder *geocoder = [[CLGeocoder alloc]init];
    // 地理编码
    [geocoder geocodeAddressString:self.address_TF.text completionHandler:^(NSArray * _Nullable placemarks, NSError * _Nullable error) {
        
        // (泛型) NSArray * _Nullable placemarks  存放地标对象的数组  _Nullable可能为空,所以需要做非空判断
        if ( placemarks.count == 0 || error) {
            NSLog(@"查询失败: %@",error);
            return ;
        }
        
        // 可能有重名,所以结果是一个数组
        CLPlacemark *place = placemarks.lastObject;
        
        // 设置数据
        self.latitude_Label.text = [NSString stringWithFormat:@"%f",place.location.coordinate.latitude];
        self.longitude_Label.text = [NSString stringWithFormat:@"%f",place.location.coordinate.longitude];
        self.detail_Label.text = [NSString stringWithFormat:@"%@",place.name];
        
    }];
    
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
@end

演示结果:

geocoder_result.png

• 反地理编码 简单界面搭建:

reverseGeoCoder.png

#import "ReverseGeocoderViewController.h"
#import 

@interface ReverseGeocoderViewController ()
@property (weak, nonatomic) IBOutlet UITextField *latitude_TF;
@property (weak, nonatomic) IBOutlet UITextField *longitude_TF;
@property (weak, nonatomic) IBOutlet UILabel *city_Label;

@end

@implementation ReverseGeocoderViewController


- (IBAction)reverseGeoCoderBtnClick:(id)sender {
    
    // 创建地理编码者
    CLGeocoder *geocoder = [[CLGeocoder alloc]init];

    // 获取位置信息对应的位置对象
    CLLocation *location = [[CLLocation alloc]initWithLatitude:[self.latitude_TF.text floatValue] longitude:[self.longitude_TF.text floatValue]];
    
    // 转换人文信息
    [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray * _Nullable placemarks, NSError * _Nullable error) {
        
        // 非空处理
        if (placemarks.count == 0 || error) {
            NSLog(@"查询失败");
            return ;
        }
        
        CLPlacemark *place = placemarks.lastObject;
        
        self.city_Label.text = place.locality;

    }];
    
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

演示结果:

reverseGeoCoder_result.png

CLPlacemark 地标对象属性介绍:

// 位置对象，包含地理信息
@property (nonatomic, readonly, copy, nullable) CLLocation *location;
// 区域，范围
@property (nonatomic, readonly, copy, nullable) CLRegion *region;
// 时区
@property (nonatomic, readonly, copy, nullable) NSTimeZone *timeZone NS_AVAILABLE(10_11,9_0);
// 地址字典 以字典的形式包含地址（人文信息）
@property (nonatomic, readonly, copy, nullable) NSDictionary *addressDictionary;

// address dictionary properties
@property (nonatomic, readonly, copy, nullable) NSString *name; // 名称
@property (nonatomic, readonly, copy, nullable) NSString *thoroughfare; // 街道名  
@property (nonatomic, readonly, copy, nullable) NSString *subThoroughfare; // 门牌号
@property (nonatomic, readonly, copy, nullable) NSString *locality; // 城市 
@property (nonatomic, readonly, copy, nullable) NSString *subLocality; // 区
@property (nonatomic, readonly, copy, nullable) NSString *administrativeArea; // 州，省
@property (nonatomic, readonly, copy, nullable) NSString *subAdministrativeArea; // 郡,县  
@property (nonatomic, readonly, copy, nullable) NSString *postalCode; // 邮政编码
@property (nonatomic, readonly, copy, nullable) NSString *ISOcountryCode; // ISO国家代号
@property (nonatomic, readonly, copy, nullable) NSString *country; // 国家
@property (nonatomic, readonly, copy, nullable) NSString *inlandWater; // 内河
@property (nonatomic, readonly, copy, nullable) NSString *ocean; // 海洋
@property (nonatomic, readonly, copy, nullable) NSArray *areasOfInterest; // 感兴趣的点