iOS 使用定位

首先需要在info.plist中添加：
NSLocationAlwaysUsageDescription、NSLocationWhenInUseUsageDescription
都设置为Yes

同时，导入CoreLocation.framework

在这里我新建了LocationManager的类

• LocationManager.h

#import <Foundation/Foundation.h>
@class CLLocation;

@protocol LocationManagerDelegate <NSObject>
/**
 *  代理方法定位成功
 *
 *  @param currentCity 获取当前的城市
 *  @param location    CLLocation.coordinate可获取坐标
 */
-(void )LocationManagerWithCurrentCity:(NSString *)currentCity CLLocation:(CLLocation *)location;
/**
 *  代理方法定位失败
 */
-(void)LocationManagerLocateFail;

@end

@interface LocationManager : NSObject

//单例
+(LocationManager *)sharedInstance;

// 开始定位
-(void)locate;

@property (nonatomic, weak) id <LocationManagerDelegate> delegate;
@end

• LocationManager.m

#import "LocationManager.h"
#import "CoreLocation/CoreLocation.h" //定位

@interface LocationManager ()<CLLocationManagerDelegate>

@property (nonatomic ,strong) CLLocationManager *locationManager;
@property (nonatomic ,copy  ) NSString          *currentCity;
@end

@implementation LocationManager

+(LocationManager *)sharedInstance{
    
    static LocationManager *shareObj = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        shareObj = [[LocationManager alloc]init];
    });
    
    return shareObj;
}

-(instancetype)init{
    if(self = [super init]){
        
        self.locationManager = [[CLLocationManager alloc] init] ;
        self.locationManager.delegate = self;
        // 判断定位操作是否被允许
        if([CLLocationManager locationServicesEnabled]) {
//            self.locationManager.distanceFilter=1.0;
            self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
            self.locationManager.distanceFilter  = 10;
            if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8) {
                [self.locationManager requestWhenInUseAuthorization];//使用程序其间允许访问位置数据（iOS8定位需要）
                [self.locationManager requestWhenInUseAuthorization]; //使用中授权
            }
            
        }else {
            //提示用户无法进行定位操作
            UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"提示" message:@"定位不成功 ,请确认开启定位" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
            [alertView show];
        }
    }
    return self;
}

#pragma mark - 定位
- (void)locate{
    // 开始定位
    [self.locationManager startUpdatingLocation];
    
}

//实现定位协议回调方法 

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
    
    //系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
    [self.locationManager stopUpdatingLocation];
    
    //此处locations存储了持续更新的位置坐标值，取最后一个值为最新位置，如果不想让其持续更新位置，则在此方法中获取到一个值之后让locationManager stopUpdatingLocation
    
    CLLocation *currentLocation = [locations lastObject];
    
    //将经度显示到label上
    XLog(@"%@",[NSString stringWithFormat:@"%lf", currentLocation.coordinate.longitude])  ;
    //将纬度现实到label上
    XLog(@"%@", [NSString stringWithFormat:@"%lf", currentLocation.coordinate.latitude])  ;

    
    // 获取当前所在的城市名
    
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    
    //根据经纬度反向地理编译出地址信息
    
    [geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *array, NSError *error)
     {

         if (array.count > 0)
         {
             
             CLPlacemark *placemark = [array objectAtIndex:0];
             
 //                           NSLog(@"name,%@",place.name);                       // 位置名
 //                           NSLog(@"thoroughfare,%@",place.thoroughfare);       // 街道
 //                           NSLog(@"subThoroughfare,%@",place.subThoroughfare); // 子街道
 //                           NSLog(@"locality,%@",place.locality);               // 市
 //                           NSLog(@"subLocality,%@",place.subLocality);         // 区
 //                           NSLog(@"country,%@",place.country);                 // 国家
             
             NSString *city = placemark.locality;
             
             if (!city) {
                 //四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
                 city = placemark.administrativeArea;
             }
             
             NSString *currentCity = [city stringByReplacingOccurrencesOfString:@"市" withString:@""];
             self.currentCity = currentCity;
             if([self.delegate respondsToSelector:@selector(LocationManagerWithCurrentCity:CLLocation:)]){
                 [self.delegate LocationManagerWithCurrentCity:self.currentCity CLLocation:currentLocation];
             }
             
         }
         
         else if (error == nil && [array count] == 0)
         {
             NSLog(@"No results were returned.");
         }
         
         else if (error != nil)
         {
             NSLog(@"An error occurred = %@", error);
         }
         
         
     }];
    
    //系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
    [manager stopUpdatingLocation];
    
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    
//    [MBProgressHUD showError:@"定位失败"];
    if ([self.delegate respondsToSelector:@selector(LocationManagerLocateFail)]) {
        [self.delegate LocationManagerLocateFail];
    }
    
    if (error.code == kCLErrorDenied) {
        // 提示用户出错原因，可按住Option键点击 KCLErrorDenied的查看更多出错信息，可打印error.code值查找原因所在
    }
}

@end