iOS_城市定位

技术点-利用CoreLoaction框架，实现城市定位功能。

原理：

利用苹果官方提供的CoreLocation框架实现城市定位的功能；

该框架主要包括两个比较有用的类：定位类CLLocationManager、地理编码类ClGeoCoder。

代码：

 1 //  Copyright © 2016年 刘勇虎. All rights reserved.
 2 //
 3 
 4 #import "ViewController.h"
 5 #import <CoreLocation/CoreLocation.h>
 6 
 7 @interface ViewController ()<CLLocationManagerDelegate>
 8 @property(strong,nonatomic)CLLocationManager *locationMananger;
 9 @property(strong,nonatomic)CLLocation *startPoint;
10 @property(strong,nonatomic)CLGeocoder *geoCode;
11 @property (weak, nonatomic) IBOutlet UILabel *cityName;
12 
13 @end
14 
15 @implementation ViewController
16 //    开始定位
17 - (IBAction)startLocationing:(UIButton *)sender {
18         [_locationMananger startUpdatingLocation];
19 }
20 
21 - (void)viewDidLoad {
22     [super viewDidLoad];
23     // Do any additional setup after loading the view, typically from a nib.
24     
25     
26     _geoCode = [[CLGeocoder alloc]init];
27     self.locationMananger = [[CLLocationManager alloc]init];
28     _locationMananger.delegate = self;
29     _locationMananger.desiredAccuracy = kCLLocationAccuracyBest;
30     //    向系统申请权限
31     [_locationMananger requestWhenInUseAuthorization];
32 
33     
34 }
35 
36 #pragma mark -- location delegate --
37 //更新定位
38 - (void)locationManager:(CLLocationManager *)manager
39     didUpdateToLocation:(CLLocation *)newLocation
40            fromLocation:(CLLocation *)oldLocation {
41     
42 //    反地理编码
43 [_geoCode reverseGeocodeLocation:newLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
44     if (placemarks && placemarks.count > 0) {
45         
46         CLPlacemark *newPlaceMark = [placemarks firstObject];
47         _cityName.text = newPlaceMark.locality;
48         [_locationMananger stopUpdatingLocation];
49     }
50 }];
51 }
52 //定位失败后回调
53 -(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
54     NSLog(@"error == %@",error);
55 }

修改info.Plist文件配置：