ios 定位是否可用的判断

- (void)locationManager: (CLLocationManager *)manager didFailWithError: (NSError *)error {

    

    NSString *errorString;

    [manager stopUpdatingLocation];

    NSLog(@"Error: %@",[error localizedDescription]);

    switch([error code]) {

        case kCLErrorDenied:

            //Access denied by user

            errorString = @"用户不让访问";

            //Do something...

            break;

        case kCLErrorLocationUnknown:

            //Probably temporary...

            errorString = @"定位关闭";

            //Do something else...

            break;

        default:

            errorString = @"获取不到位置信息，网络不稳定等";

            break;

    }

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:errorString delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];

    [alert show];

}