iOS_城市定位

技术点-利用CoreLoaction框架，实现城市定位功能。

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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。

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代码：

 //  Copyright © 2016年 刘勇虎. All rights reserved.
 //

 #import "ViewController.h"
 #import <CoreLocation/CoreLocation.h>

 @interface ViewController ()<CLLocationManagerDelegate>
 @property(strong,nonatomic)CLLocationManager *locationMananger;
 @property(strong,nonatomic)CLLocation *startPoint;
 @property(strong,nonatomic)CLGeocoder *geoCode;
 @property (weak, nonatomic) IBOutlet UILabel *cityName;

 @end

 @implementation ViewController
 //    开始定位
 - (IBAction)startLocationing:(UIButton *)sender {
         [_locationMananger startUpdatingLocation];
 }

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.

     _geoCode = [[CLGeocoder alloc]init];
     self.locationMananger = [[CLLocationManager alloc]init];
     _locationMananger.delegate = self;
     _locationMananger.desiredAccuracy = kCLLocationAccuracyBest;
     //    向系统申请权限
     [_locationMananger requestWhenInUseAuthorization];

 }

 #pragma mark -- location delegate --
 //更新定位
 - (void)locationManager:(CLLocationManager *)manager
     didUpdateToLocation:(CLLocation *)newLocation
            fromLocation:(CLLocation *)oldLocation {

 //    反地理编码
 [_geoCode reverseGeocodeLocation:newLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
     if (placemarks && placemarks.count > ) {

         CLPlacemark *newPlaceMark = [placemarks firstObject];
         _cityName.text = newPlaceMark.locality;
         [_locationMananger stopUpdatingLocation];
     }
 }];
 }
 //定位失败后回调
 -(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
     NSLog(@"error == %@",error);
 }

修改info.Plist文件配置：