定位和反查位置信息要加载两个动态库 CoreLocation.framework 和 MapKit.framework 一个获取坐标一个提供反查,可以通过配置NSLocationAlwaysUsageDescription或者 NSLocationWhenInUseUsageDescription来告诉用户使用定位服务的目的，并且注意这个配置是必须的

import "ViewController.h"

import <UIKit/UIKit.h>

import <CoreLocation/CoreLocation.h>

import <MapKit/MapKit.h>

@interface ViewController ()<CLLocationManagerDelegate>

@property (nonatomic, strong) CLLocationManager *locationManager;
@property (nonatomic, strong) UIButton *button;

@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.

  self.button = [UIButton buttonWithType:UIButtonTypeSystem];
  _button.frame = CGRectMake(0, 100, 100, 30);
  [_button setTitle:@"定位" forState:0];
  [_button addTarget:self action:@selector(_startLocation) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:_button];
  }

• (void)_startLocation {

  self.locationManager = [[CLLocationManager alloc] init];
  self.locationManager.delegate = self;
  self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
  self.locationManager.distanceFilter = 10.0f;
  [self.locationManager startUpdatingLocation];
  [self.locationManager requestWhenInUseAuthorization];
  }

实现locationManager的代理方法

• (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations {

  CLLocation *newLocation = locations[0];

  CLLocationCoordinate2D oCoordinate = newLocation.coordinate;
  NSLog(@"经度：%f， 纬度： %f",oCoordinate.longitude,oCoordinate.latitude);
  [self.locationManager stopUpdatingLocation];

  CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
  [geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {

    for (CLPlacemark *place in placemarks) {
        
        NSDictionary *location = [place addressDictionary];
        
        NSLog(@"国家：%@",[location objectForKey:@"Country"]);
        NSLog(@"城市：%@",[location objectForKey:@"State"]);
        NSLog(@"区：%@",[location objectForKey:@"SubLocality"]);
        
        NSLog(@"位置：%@",place.name);
        NSLog(@"国家：%@",place.country);
        NSLog(@"城市：%@",place.locality);
        NSLog(@"区：%@",place.subLocality);
        NSLog(@"街道：%@",place.thoroughfare);
        NSLog(@"子街道：%@",place.subThoroughfare);
    }
  

  }];
  }