- 使用CLGeocoder可以完成“地理編碼”和“反地理編碼”
- 地理編碼：根據給定的地名，獲得具體的位置信息（比如經度和緯度，以及地址的全稱）
- 反地理編碼：根據給定的經度和緯度，獲取具體的位置信息
（一）地理編碼
-
具體的做法:（就兩步）
1.創建地理編碼對象：導入框架#import <CoreLocation/CoreLocation.h> CLGeocoder *geocoder = [[CLGeocoder alloc]init]; 2.利用地理編碼對象編碼：聲明一個@property(nonatomic,strong) CLGeocoder *geocoder;屬性調用一個地理編碼方法:（很重要）
[self.geocoder geocodeAddressString:self.addressFiled.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error)
地理編碼方法：
編碼展示
下面是具體的代碼：（在storyBoard里面畫的，1個button,1個UITextFiled,3個UILabel）
#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>
@interface ViewController ()<CLLocationManagerDelegate>
/*
需要編碼的地址容器
*/
@property (weak, nonatomic) IBOutlet UITextField *addressFiled;
/*
經度容器
*/
@property (weak, nonatomic) IBOutlet UILabel *longitudeLabel;
/*
緯度容器
*/
@property (weak, nonatomic) IBOutlet UILabel *latitudeLabel;
/*
詳情容器
*/
@property (weak, nonatomic) IBOutlet UILabel *detailAddressLabel;
/*
監聽地理編碼點擊事件
*/
- (IBAction)geocoderBtnClick;
@property(nonatomic,strong) CLGeocoder *geocoder;
@end
@implementation ViewController
//1.創建地理編碼對象
-(CLGeocoder *)geocoder
{
if (!_geocoder) {
_geocoder = [[CLGeocoder alloc]init];
}
return _geocoder;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.addressFiled.clearButtonMode = UITextFieldViewModeAlways;
self.addressFiled.placeholder = @" 請輸入地理位置";
}
- (IBAction)geocoderBtnClick {
//獲取用戶輸入的位置
NSString *addressString = self.addressFiled.text;
NSLog(@"%@",addressString);
if (addressString == nil || addressString.length == 0) {
NSLog(@"請輸入地址");
return;
}
//2.利用地理編碼對象編碼
//根據傳入的地址獲取該地址的對應的經緯度信息
[self.geocoder geocodeAddressString:self.addressFiled.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
//placemarks 地標 地標數組里面存放著地標，每一個地標包含了該位置的經緯度，以及城市/區域/國家代碼/郵編等等....
if (placemarks.count == 0 || error != nil) {
return;
}
//獲取數組里面第一個信息
CLPlacemark *placemark = [placemarks firstObject];
self.latitudeLabel.text = [NSString stringWithFormat:@" %f", placemark.location.coordinate.latitude];
self.longitudeLabel.text = [NSString stringWithFormat:@" %f",placemark.location.coordinate.longitude];
NSArray *array = placemark.addressDictionary[@"FormattedAddressLines"];
NSMutableString *stringAddstring = [NSMutableString string];
for (NSString *string in array) {
[stringAddstring appendString:string];
}
self.detailAddressLabel.text = stringAddstring;
NSLog(@"%@ %@ %f %f",placemark.name,placemark.addressDictionary,placemark.location.coordinate.latitude,placemark.location.coordinate.longitude);
}];
}
@end
（二）反地理編碼
1.創建地理編碼對象：導入框架#import <CoreLocation/CoreLocation.h>
CLGeocoder *geocoder = [[CLGeocoder alloc]init];
2.利用地理編碼對象編碼：聲明一個@property(nonatomic,strong) CLGeocoder *geocoder;屬性
調用一個反地理編碼方法:（很重要）
[self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error)
反編碼
-
下面是具體的代碼
#import "ViewController.h" #import <CoreLocation/CoreLocation.h> @interface ViewController ()<CLLocationManagerDelegate> - (IBAction)clickButton; @property (weak, nonatomic) IBOutlet UITextField *latitudeValue; @property (weak, nonatomic) IBOutlet UITextField *longitudeValue; @property (weak, nonatomic) IBOutlet UILabel *labelText; @property(nonatomic,strong) CLGeocoder *geocoder; @end @implementation ViewController -(CLGeocoder *)geocoder { if (!_geocoder) { _geocoder = [[CLGeocoder alloc]init]; } return _geocoder; } - (void)viewDidLoad { [super viewDidLoad]; } - (IBAction)clickButton { //1.獲取用戶輸入的經緯度 NSString *latitudeString = self.latitudeValue.text; NSString *longitudeValueString = self.longitudeValue.text; if (latitudeString == nil || latitudeString.length == 0 || longitudeValueString == nil || longitudeValueString.length == 0) { NSLog(@"請輸入經緯度"); return; } //2.根據用戶輸入的經緯度創建CLLocation對象 CLLocation *location = [[CLLocation alloc]initWithLatitude:[latitudeString doubleValue] longitude:[longitudeValueString doubleValue]]; //3.根據CLLocation對象獲取相應的地表信息 [self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) { for (CLPlacemark *placemark in placemarks) { self.labelText.text = placemark.locality; NSLog(@"哈哈"); } }]; } @end
