ios - Clocationmanager Didupdatelocation 委托(delegate)在没有互联网的情况下不会被调用

Question

我目前正在开发基于位置的 iOS 应用程序。我正在使用 diduplatelocation 委托(delegate)方法来显示用户的当前位置。当我将我的设备连接到互联网时，它工作正常。但是当我断开互联网时，它的行为很奇怪并且 didupdatelocation 没有被进一步调用。请给出解决方案。已编辑，包含代码详细信息

- (void)viewDidLoad
{
    [super viewDidLoad];
    locationManager = [[CLLocationManager alloc]init]; // initializing locationManager
    locationManager.delegate = self; // we set the delegate of locationManager to self. 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest; // setting the accuracy

    [locationManager startUpdatingLocation];  //requesting location updates
}

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    UIAlertView *errorAlert = [[UIAlertView alloc]initWithTitle:@"Error" message:@"There was an error retrieving your location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [errorAlert show];
    NSLog(@"Error: %@",error.description);
}
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *crnLoc = [locations lastObject];
    latitude.text = [NSString stringWithFormat:@"%.8f",crnLoc.coordinate.latitude];
    longitude.text = [NSString stringWithFormat:@"%.8f",crnLoc.coordinate.longitude];
    altitude.text = [NSString stringWithFormat:@"%.0f m",crnLoc.altitude];
    speed.text = [NSString stringWithFormat:@"%.1f m/s", crnLoc.speed];
}

Answer 1

@ANSHAD 根据您的评论，如果您使用的是没有 GPS 的旧 iPad，则获取位置数据的唯一方法是使用 WiFi，因此如果您关闭 WiFi，您将无法获得位置更新。如果你想要没有 WiFi 的 GPS，你可以购买一个外部 GPS 模块 see here