iOS 地理编码和反地理编码

1.UI搭建,import头文件

#import <CoreLocation/CoreLocation.h>

2.添加成员变量,并连线

- (IBAction)geocodeButton;
@property (weak, nonatomic) IBOutlet UITextField *inputAddress;
@property (weak, nonatomic) IBOutlet UITextField *longitude;
@property (weak, nonatomic) IBOutlet UITextField *latitude;
@property (weak, nonatomic) IBOutlet UITextView *detailAddress;


- (IBAction)unGeocodeButton;
@property (weak, nonatomic) IBOutlet UITextField *reverseLongitude;
@property (weak, nonatomic) IBOutlet UITextField *reverseLatitude;
@property (weak, nonatomic) IBOutlet UITextView *reverseDetailAddress;

3.添加地理编码和反地理编码的方法

/**
 *  懒加载
 */
- (CLGeocoder *)geocoder
{
    if (_geocoder == nil) {
        _geocoder = [[CLGeocoder alloc]init];
    }
    return _geocoder;
}

/**
 *  键盘处理
 */
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.view endEditing:YES];
}

/**
 *  地理编码
 */
- (IBAction)geocodeButton {
    NSString *address = self.inputAddress.text;
    [self.geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {
        // 地址为空,直接返回
        if (!address) return ;
        if (error) { // 输入的地址有错误
            self.detailAddress.text = @"你输入的地址可能不存在";
        }else{
            // 遍历查询到的地标
            NSLog(@"总共有%d个地标符合要求",placemarks.count);
            for (int i = 0; i < placemarks.count; i++) {
                CLPlacemark *placemark = placemarks[i];
                NSLog(@"%@",placemark);
            }
            
            // 取地标数组的第一个为最终结果
            CLPlacemark *placemark = [placemarks firstObject];
            self.detailAddress.text = placemark.name;
            self.latitude.text =[NSString stringWithFormat:@"%.1f", placemark.location.coordinate.latitude];
            self.longitude.text = [NSString stringWithFormat:@"%.1f", placemark.location.coordinate.longitude];
        }
    }];
}

/**
 *  反地理编码
 */
- (IBAction)unGeocodeButton {
    // 经纬度转换
    CLLocationDegrees longitude =  [self.reverseLongitude.text doubleValue];
    CLLocationDegrees latitude = [self.reverseLatitude.text doubleValue];
    CLLocation *location = [[CLLocation alloc]initWithLatitude:latitude longitude:longitude];
    
    // 反地理编码
    [self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        if (location == nil) return;
        if (error) {
            NSLog(@"你输入的经纬度有误");
        }else{
            // 遍历地标数组
            NSLog(@"总共有%d个地标符合要求",placemarks.count);
            for (int i; i < placemarks.count; i++) {
                CLPlacemark *placemark = placemarks[i];
                NSLog(@"%@",placemark);
            }
            
            // 取地标数组的第一个为最终结果
            CLPlacemark *placemark =[placemarks firstObject];
            self.reverseDetailAddress.text = placemark.name;
        }

    }];
}