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 > 0) {
        
        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：