Ios CLLocationAccuracyBest]； [新地区发布]； } 否则{ NSLog（@“区域监控不可用”）； } }

这项工作源自“区域”模板。

这是您将获得的最佳精度。区域匹配仅使用细胞塔三角测量，因此在密集区域，它可能在50-100米处触发，而在稀疏区域，它可能需要100米

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如果您想要更详细的信息，那么您将不得不使用直接定位服务。但这会消耗电池，所以选择你的毒药。

iOS模拟器对于带有退出/进入功能的geofence更新是出了名的糟糕。您可以确认这一点的一种方法是在应用程序上设置geofence作为您的当前位置。然后，在iOS模拟器的调试菜单中，按location，然后按Freeway Drive。您的设备现在将模拟在高速公路上行驶，如果您的模拟器与我的一样，它将不会注册didExitRegion事件

为什么?？区域主要由苹果的隐藏算法决定，该算法使用Wi-Fi、手机发射塔和手机上请求位置的其他应用程序。因为模拟器不使用Wi-Fi或手机发射塔。。。区域监控将是非常不可能的

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要测试区域退出后代码的其余部分是否正常工作，您可以创建一个按钮或其他东西，手动触发locationManager:didExitRegion:method。我还强烈建议在您的设备上编译该项目，方法是将其插入并从iPhone模拟器更改为iOS设备。然后，您可以拔下设备的插头，从手机上运行应用程序进行测试。

我在iPhone上部署了应用程序，设置了一个15-25米的区域，在该区域外走了整整50米，什么都没有。有什么建议吗？

- (void)viewDidLoad {
    [super viewDidLoad];

  // Create empty array to add region events to.
  updateEvents = [[NSMutableArray alloc] initWithCapacity:0];

  // Create location manager with filters set for battery efficiency.
  locationManager = [[CLLocationManager alloc] init];
  locationManager.delegate = self;
  locationManager.distanceFilter = kCLLocationAccuracyBest; //could try KLDistanceFilterNone;
  locationManager.desiredAccuracy = kCLLocationAccuracyBest;

  // Start updating location changes.
          [locationManager startUpdatingLocation];
}

- (void)viewDidAppear:(BOOL)animated {
  // Get all regions being monitored for this application.
  NSArray *regions = [[locationManager monitoredRegions] allObjects];

  // Iterate through the regions and add annotations to the map for each of them.
          for (int i = 0; i < [regions count]; i++) {
                    CLRegion *region = [regions objectAtIndex:i];
  RegionAnnotation *annotation = [[RegionAnnotation alloc] initWithCLRegion:region];
                    [regionsMapView addAnnotation:annotation];
                    [annotation release];
          }
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
  NSLog(@"didFailWithError: %@", error);
}


- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
  NSLog(@"didUpdateToLocation %@ from %@", newLocation, oldLocation);

  // Work around a bug in MapKit where user location is not initially zoomed to.
          if (oldLocation == nil) {
  // Zoom to the current user location.
                    MKCoordinateRegion userLocation = MKCoordinateRegionMakeWithDistance(newLocation.coordinate, 100.0, 100.0);
                    [regionsMapView setRegion:userLocation animated:YES];
          }
}


- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region  {
  NSString *event = [NSString stringWithFormat:@"didEnterRegion %@ at %@", region.identifier, [NSDate date]];

          [self updateWithEvent:event];
}


- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
  NSString *event = [NSString stringWithFormat:@"didExitRegion %@ at %@", region.identifier, [NSDate date]];
          [self updateWithEvent:event];
//implement local notification:
    UIApplication *app                = [UIApplication sharedApplication];
    UILocalNotification *notification = [[UILocalNotification alloc] init];
    [[UIApplication sharedApplication] cancelAllLocalNotifications];

    if (notification == nil)
        return;
    notification.alertBody = [NSString stringWithFormat:@"Did You Lock Your House?"];
    notification.alertAction = @"Lock House";
    notification.soundName = UILocalNotificationDefaultSoundName;
    notification.applicationIconBadgeNumber = 1;
    [app presentLocalNotificationNow:notification];

    [notification release];
// ends here

//following is an alert for the case of exiting boundary whilst app is in foreground
    UIAlertView *alr=[[UIAlertView alloc] initWithTitle:@"Reminder didExitRegion" message:region.identifier delegate:nil cancelButtonTitle:nil otherButtonTitles:@"Ok",nil];

    [alr show];

    [alr release];
    //ends here
}

- (void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error {
  NSString *event = [NSString stringWithFormat:@"monitoringDidFailForRegion %@: %@", region.identifier, error];

          [self updateWithEvent:event];
}

- (IBAction)addRegion {
  if ([CLLocationManager regionMonitoringAvailable]) {
  // Create a new region based on the center of the map view.
  CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(regionsMapView.centerCoordinate.latitude, regionsMapView.centerCoordinate.longitude);
  CLRegion *newRegion = [[CLRegion alloc] initCircularRegionWithCenter:coord
                                                                                                                                                                              radius:25.0
                                                                                                                                                                   identifier:[NSString stringWithFormat:@"%f, %f", regionsMapView.centerCoordinate.latitude, regionsMapView.centerCoordinate.longitude]];

  // Create an annotation to show where the region is located on the map.
                    RegionAnnotation *myRegionAnnotation = [[RegionAnnotation alloc] initWithCLRegion:newRegion];
                    myRegionAnnotation.coordinate = newRegion.center;
                    myRegionAnnotation.radius = newRegion.radius;

                    [regionsMapView addAnnotation:myRegionAnnotation];

                    [myRegionAnnotation release];

  // Start monitoring the newly created region.
                    [locationManager startMonitoringForRegion:newRegion desiredAccuracy:kCLLocationAccuracyBest];

                    [newRegion release];
          }
  else {
  NSLog(@"Region monitoring is not available.");
          }
}