iBeacon didEnterRegion 在后台并锁定时未触发

Question

我有一个 iBeacon 配置为：

NSUUID *proximityUUID = [[NSUUID alloc] initWithUUIDString:kUUID];
self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:proximityUUID identifier:kIdentifier];
self.beaconRegion.notifyEntryStateOnDisplay = NO;    
self.beaconRegion.notifyOnEntry = YES;
self.beaconRegion.notifyOnExit = YES;

当我的应用关闭并且设备被锁定时，didEnterRegion 永远不会被触发：

locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{
    [self sendLocalNotificationForBeaconRegionHello:(CLBeaconRegion *)region];
}

- (void)sendLocalNotificationForBeaconRegionHello:(CLBeaconRegion *)region
{
    UILocalNotification *notification = [UILocalNotification new];

    notification.alertBody = [NSString stringWithFormat:@"Welcome - %@", region.identifier];
    notification.alertAction = NSLocalizedString(@"View", nil);
    notification.soundName = UILocalNotificationDefaultSoundName;
    notification.fireDate = nil;
    notification.hasAction = false;

    [[UIApplication sharedApplication] presentLocalNotificationNow:notification];
}

即使应用程序已关闭且手机已锁定，也会调用 didExitRegion。我只有在解锁手机时进入区域时才会收到通知。

任何想法可能是什么问题？

谢谢

Answer 1

我怀疑该方法正在被调用，但由于某种原因通知被吞下（尽管代码看起来不错）。尝试添加如下方法来帮助弄清楚发生了什么：

- (void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{
    if(state == CLRegionStateInside) {
        NSLog(@"locationManager didDetermineState INSIDE for %@", region.identifier);
    }
    else if(state == CLRegionStateOutside) {
       NSLog(@"locationManager didDetermineState OUTSIDE for %@", region.identifier);
    }
    else {
        NSLog(@"locationManager didDetermineState OTHER for %@", region.identifier);
    }
}

在didExitRegion 中查看您的代码以进行比较也很有用，并了解有关您如何测试进入/退出条件（包括等待时间）的详细信息。