我正在整理一个应用程序，当用户离开家时会触发通知。所以我已经实现了半径为 25 的区域监控。我遇到的问题是在模拟时（iPhone 模拟器 5.0），我设置了一个自定义位置（家）来设置区域边界。然后在区域边界之外输入另一个自定义位置，即在街道的尽头。但是该应用程序没有注册该区域的退出。只有当我设置家庭位置和地区，然后更改为 Apple 总部时，它才会注册并发出通知。该应用程序在后台模式下切换到显着的位置变化。但是在前台或后台时它有同样的问题。我正在寻找的，比如“提醒”应用程序，是让应用程序在退出/离开区域边界（即走到街道尽头）后很快发出通知。
这是我的一些 viewcontroller.m 文件：
- (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.");
}
}
这项工作源自“区域”模板。