IOS 定位CoreLocation代码

-(void)startLocation{

    //0.判断
    if (![CLLocationManager locationServicesEnabled]) {
        NSLog(@"没有定位 或者没有打开定位");
    }

    //1.创建一个定位对象
    manager = [[CLLocationManager alloc]init];
    //设置GPS的精确度
    manager.desiredAccuracy = kCLLocationAccuracyBest;

    //下面是精确度从高到低(越精确越耗电)
    //kCLLocationAccuracyBestForNavigation   //(最精确)
    //kCLLocationAccuracyBest;
    //kCLLocationAccuracyNearestTenMeters;
    //kCLLocationAccuracyHundredMeters;
    //kCLLocationAccuracyKilometer;
    //kCLLocationAccuracyThreeKilometers;

    //2.设置代理 目的值GPS有数据来调用代理方法
    manager.delegate = self;

    //3.更新位置数据
    [manager startUpdatingLocation];
}

//4.结束定位
-(void)stopLocation{
    [manager stopUpdatingLocation];
    manager = nil;
}

#pragma mark - 每次GPS更新位置信息都会被触发
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
    for(CLLocation *loc in locations){
        //CLLocation 就是一次经纬度 , 方向 海拔 等信息
        //loc.coordinate就是取的经纬度
        CLLocationCoordinate2D l = loc.coordinate;
        CLLocationDegrees lat = l.latitude;
        CLLocationDegrees lng = l.longitude;
        //海拔
        CLLocationDistance altitude = loc.altitude;

        NSLog(@"GPS (%f, %f, %f)", lat, lng, altitude);
    }
}