进阶 13-6Map 定位管理器

#import "CoreLocationViewController.h"
//引入头文件
#import <CoreLocation/CoreLocation.h>
@interface CoreLocationViewController ()<CLLocationManagerDelegate>//遵循协议
/*  声明位置管理器属性 */
@property (strong,nonatomic) CLLocationManager *locationManager;
@end

@implementation CoreLocationViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.locationManager = [[CLLocationManager alloc] init];
    
    //判断你是否打开定位服务
    if (![CLLocationManager locationServicesEnabled]) {
        NSLog(@"定位服务当前尚未打开，请设置打开");
        return;
    }
    //如果没有授权定位服务，则请求用户授权
    if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined) {
        /** 在info.plist中添加如下字段中的任意一个
         *  ①NSLocationWhenInUseUsageDescription  YES
         *  ②NSLocationAlwaysUsageDescription  YES
         *  如果两个同时添加，则默认为第①个，但是如果只添加了第②个的话
         */
        [self.locationManager requestAlwaysAuthorization];
    }
    //如果被授权
    else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorizedAlways){
        //设置代理
        self.locationManager.delegate = self;
        /** 定位精度：枚举类型
         *  kCLLocationAccuracyBest;最精确的
         *  kCLLocationAccuracyNearestTenMeters;十米误差范围
         *  kCLLocationAccuracyHundredMeters;百米误差范围
         *  kCLLocationAccuracyKilometer;千米误差范围
         *  kCLLocationAccuracyThreeKilometers;三千米
         */
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
        
        //定位距离（每隔多少米定位一次，单位：米）
        CLLocationDistance distance = 10.0;//每隔多少米定位一次
        self.locationManager.distanceFilter = distance;
        
        //启动定位服务
        [self.locationManager startUpdatingLocation];
    }
}
@end