定位管理器的访问

 

 

   //定位管理器
    
    _locationManager=[[CLLocationManager alloc]init];
    if (![CLLocationManager locationServicesEnabled]) {
        NSLog(@"定位服务当前可能尚未打开，请设置打开！");
    }
    //如果没有授权则请求用户授权
    if ([CLLocationManager authorizationStatus]==kCLAuthorizationStatusNotDetermined){
        [_locationManager requestWhenInUseAuthorization];
    }else if([CLLocationManager authorizationStatus]==kCLAuthorizationStatusAuthorizedWhenInUse){
        //设置代理
        _locationManager.delegate=self;
        //设置定位精度
        _locationManager.desiredAccuracy=kCLLocationAccuracyBest;
        //定位频率,每隔多少米定位一次
        CLLocationDistance distance=1000.0;//十米定位一次
        _locationManager.distanceFilter=distance;
        //启动跟踪定位
        [_locationManager startUpdatingLocation];
    }