从未调用过LocationManager的didEnterRegion

Question

我已经厌倦了发现这个问题，但无法理解为什么没有调用Location Manager的委派方法didEnterRegion或didExitRegion。我在我的iPhone上测试了这个，但它不起作用。请告诉我我错过了什么。我的源代码是：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
   self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];

    manager = [[CLLocationManager alloc] init];
    manager.delegate = self;
    dist = 100;
    coord = CLLocationCoordinate2DMake(24.004686, 74.554088);
    region=[[CLRegion alloc] initCircularRegionWithCenter:coord radius:dist identifier:@"emanuele"];
    [manager startMonitoringForRegion:region desiredAccuracy:10];
    return YES;
}

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{
    NSLog(@"Enter Region.");
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Got it..." message:@"You have Entered the Location." delegate:nil cancelButtonTitle:@"OK"  otherButtonTitles: nil];
    [alert show];
//    [alert release];
}
- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
    NSLog(@"didExitRegion");
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Got it..." message:@"You have Exited the Location." delegate:nil cancelButtonTitle:@"OK"  otherButtonTitles: nil];
    [alert show];
//    [alert release];
}

有人能找出问题出在哪里吗？？我已经搜索了很多演示和源代码，但大多数都以didUpdateToLocation结尾，在我的例子中调用了它，但是我对didEnter和didExit有问题。我还实现了didFailWithError，但它没有做到这一点。请给出不调用这两个方法的任何线索。或者给我任何调用这些方法的链接，我没有找到这些方法的示例/源代码。任何帮助都将不胜感激。

Answer 1

在viewDidLoad中，添加以下代码

self.beaconRegion.notifyOnEntry=YES;
self.beaconRegion.notifyOnExit=YES;
self.beaconRegion.notifyEntryStateOnDisplay=YES;
[self.locationManager startMonitoringForRegion:self.beaconRegion];
[self.locationManager requestStateForRegion:self.beaconRegion];

我希望这能解决你的问题。

Answer 2

只有在一般设置中启用了后台应用程序刷新后，我才能获得didEnterZone和didExitZone。

Answer 3

您的头文件是否声明为CLLocationManagerDelegate？

设置监控区域后，应通过删除该代码元素进行测试，然后在按如下方式启动时检查UIApplicationLaunchProctionsLocationKey键：

 if ([launchOptions objectForKey:@"UIApplicationLaunchOptionsLocationKey"]){

        NSLog(@"UIApplicationLaunchOptionsLocationKey - fired");
        if(locman == nil){
            locman = [[CLLocationManager alloc]init];


        locman.delegate = self;
        locman.distanceFilter = kCLLocationAccuracyBest;
        }

    }

然后将调用location manager代表，并且didEnter和didExit应触发ok。