iOS 设备定位功能可用的判断

if ([CLLocationManager locationServicesEnabled] &&
                ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorized
                || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined)) {
                //定位功能可用
               CLLocationManager  *locationManger = [[CLLocationManager alloc] init];
                locationManger.delegate = self;
                [locationManger startUpdatingLocation];
            }
 else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied){
        NSlog("定位功能不可用");
        }