iOS开发拓展篇—CoreLocation地理编码

  1 //
  2 //  YYViewController.m
  3 //  地理编码
  4 //
  5 //  Created by XiaoZeng on 14-8-11.
  6 //  Copyright (c) 2014年 github. All rights reserved.
  7 //
  8 
  9 #import "ViewController.h"
 10 #import <CoreLocation/CoreLocation.h>
 11 
 12 @interface ViewController ()
 13 @property(nonatomic,strong)CLGeocoder *geocoder;
 14 #pragma mark-地理编码
 15 - (IBAction)geocode;
 16 @property (weak, nonatomic) IBOutlet UITextField *addressField;
 17 @property (weak, nonatomic) IBOutlet UILabel *longitudeLabel;
 18 @property (weak, nonatomic) IBOutlet UILabel *latitudeLabel;
 19 @property (weak, nonatomic) IBOutlet UILabel *detailAddressLabel;
 20 
 21 #pragma mark-反地理编码
 22 
 23 - (IBAction)reverseGeocode;
 24 @property (weak, nonatomic) IBOutlet UITextField *longitudeField;
 25 @property (weak, nonatomic) IBOutlet UITextField *latitudeField;
 26 @property (weak, nonatomic) IBOutlet UILabel *reverdeDetailAddressLabel;
 27 @end
 28 
 29 @implementation YYViewController
 30 
 31 #pragma mark-懒加载
 32 -(CLGeocoder *)geocoder
 33 {
 34     if (_geocoder == nil) {
 35         _geocoder = [[CLGeocoder alloc] init];
 36     }
 37     return _geocoder;
 38 }
 39 - (void)viewDidLoad
 40 {
 41     [super viewDidLoad];
 42 }
 43 /**
 44  *  地理编码：地名—>经纬度坐标
 45  */
 46 - (IBAction)geocode {
 47     // 1.获得输入的地址
 48     NSString *address = self.addressField.text;
 49     if (address.length == 0) return;
 50     
 51     // 2.开始地理编码
 52     // 说明：调用下面的方法开始编码，不管编码是成功还是失败都会调用block中的方法
 53     [self.geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {
 54         // 如果有错误信息，或者是数组中获取的地名元素数量为0，那么说明没有找到
 55         if (error || placemarks.count == 0) {
 56             self.detailAddressLabel.text=@"你输入的地址没找到，可能在月球上";
 57         }else   // 编码成功，找到了具体的位置信息
 58         {
 59             // 打印查看找到的所有的位置信息
 60                 /*
 61                     name:名称
 62                     locality:城市
 63                     country:国家
 64                     postalCode:邮政编码
 65                  */
 66             for (CLPlacemark *placemark in placemarks) {
 67                 NSLog(@"name=%@ locality=%@ country=%@ postalCode=%@", placemark.name, placemark.locality, placemark.country, placemark.postalCode);
 68             }
 69             
 70             // 取出获取的地理信息数组中的第一个显示在界面上
 71             CLPlacemark *firstPlacemark = [placemarks firstObject];
 72             // 详细地址名称
 73             self.detailAddressLabel.text = firstPlacemark.name;
 74             // 纬度
 75             CLLocationDegrees latitude = firstPlacemark.location.coordinate.latitude;
 76             // 经度
 77             CLLocationDegrees longitude = firstPlacemark.location.coordinate.longitude;
 78             self.latitudeLabel.text = [NSString stringWithFormat:@"%.2f",latitude];
 79             self.longitudeLabel.text = [NSString stringWithFormat:@"%.2f",longitude];
 80         }
 81     }];
 82 }
 83 
 84 /**
 85  *  反地理编码：经纬度坐标—>地名
 86  */
 87 - (IBAction)reverseGeocode {
 88     // 1.获得输入的经纬度
 89     NSString *longtitudeText = self.longitudeField.text;
 90     NSString *latitudeText = self.latitudeField.text;
 91     if (longtitudeText.length == 0 || latitudeText.length == 0) return;
 92     
 93     CLLocationDegrees latitude = [latitudeText doubleValue];
 94     CLLocationDegrees longitude = [longtitudeText doubleValue];
 95     
 96     CLLocation *location = [[CLLocation alloc] initWithLatitude:latitude longitude:longitude];
 97     // 2.反地理编码
 98     [self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
 99         if (error || placemarks.count == 0) {
100             self.reverdeDetailAddressLabel.text = @"你输入的地址没找到，可能在月球上";
101         }else//编码成功 
102         {
103             //显示最前面的地标信息
104             CLPlacemark *firstPlacemark = [placemarks firstObject];
105             self.reverdeDetailAddressLabel.text = firstPlacemark.name;
106             //经纬度
107             CLLocationDegrees latitude = firstPlacemark.location.coordinate.latitude;
108             CLLocationDegrees longitude = firstPlacemark.location.coordinate.longitude;
109             self.latitudeField.text = [NSString stringWithFormat:@"%.2f",latitude];
110             self.longitudeField.text = [NSString stringWithFormat:@"%.2f",longitude];
111         }
112     }];
113 }
114 
115 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
116 {
117     [self.view endEditing:YES];
118 }
119 @end