Detailed Explanation of iOS Native Map Geocoding and Anti Geocoding of

When we want to realize the function in App: input the land name, encode it as longitude and latitude, and realize the navigation function.

Then, I need to use the geocoding function in the native map, while Core Location mainly includes positioning and geocoding (including anti-coding) functions.

Import in File

#import <CoreLocation/CoreLocation.h>

Geocoding:

/** 
  Geocoding  
 */
- (void)geocoder { 
   
  CLGeocoder *geocoder=[[CLGeocoder alloc]init]; 
   
  NSString *addressStr = @" Baoan District, Shenzhen City, Guangdong Province ";// Location information  
   
  [geocoder geocodeAddressString:addressStr completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) { 
    if (error!=nil || placemarks.count==0) { 
      return ; 
    } 
    // Create placemark Object  
    CLPlacemark *placemark=[placemarks firstObject]; 
    // Longitude  
    NSString *longitude =[NSString stringWithFormat:@"%f",placemark.location.coordinate.longitude]; 
    // Latitude  
    NSString *latitude =[NSString stringWithFormat:@"%f",placemark.location.coordinate.latitude]; 
     
    NSLog(@" Longitude: %@ Latitude: %@",longitude,latitude); 
     
  }]; 
   
}

Geographic back coding:

/** 
  Geographic back coding  
 */
- (void)reverseGeocoder{ 
  // Create a geocoding object  
  CLGeocoder *geocoder=[[CLGeocoder alloc]init]; 
   
  // Longitude  
  NSString *longitude = @"113.23"; 
  // Latitude  
  NSString *latitude = @"23.16"; 
   
   
  // Creation location  
  CLLocation *location=[[CLLocation alloc]initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]]; 
   
   
  // Inverse geocoding  
  [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) { 
    // Judge whether there is an error or placemarks Whether it is empty or not  
    if (error !=nil || placemarks.count==0) { 
      NSLog(@"%@",error); 
      return ; 
    } 
    for (CLPlacemark *placemark in placemarks) { 
      // Detailed address  
      NSString *addressStr = placemark.name; 
      NSLog(@" Detailed address 1 : %@",addressStr); 
      NSLog(@" Detailed address 2 : %@",placemark.addressDictionary); 
      NSLog(@" Detailed address 3 : %@",placemark.locality); 
    } 
     
  }]; 
}