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：
时间： 2024-08-04 21:06:26