ios - 如何将iBeacon设置为仅在单个设备上广播一次本地通知？

每当我们进入或离开某个地区时，我都会显示本地通知

locationManager:didRangeBeacons:inRegion method of CLLocationManagerDelegate:

像这样

//local notification sent from transmitter to receiver

switch (beacon.proximity)
{
 case CLProximityNear:
   message = @"You are near the ibeacon device";
   bgColor = [UIColor blueColor];
   break;
 case CLProximityImmediate:
   message = @"You are very closer to the device..";
   bgColor = [UIColor colorWithRed:.0f green:.0f blue:230.0f alpha:1.0f];
   break;
}

现在，当接收方检测到发送方并发送本地通知时，接收方将获取本地通知。另外，我想将本地通知设置为一天，即接收方只能从发送方接收一次消息。非常感谢宝贵的建议。

注意:我将iPad mini用作发射器，将iPhone 5用作接收器。

最佳答案

您需要跟踪在didRangeBeaconsInRegion方法中检测到每个信标的时间，并使用软件过滤器忽略某些信标(如果最近发现过的话)。

here.显示了如何执行此操作的示例。其核心是:

  - (void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLRegion *)region
  {
      for (CLBeacon *beacon in beacons) {
          Boolean shouldSendNotification = NO;
          NSDate *now = [NSDate date];
          NSString *beaconKey = [NSString stringWithFormat:@"%@_%ld_%ld", [beacon.proximityUUID UUIDString], (long) beacon.major, (long) beacon.minor];
          NSLog(@"Ranged UUID: %@ Major:%ld Minor:%ld RSSI:%ld", [beacon.proximityUUID UUIDString], (long)beacon.major, (long)beacon.minor, (long)beacon.rssi);

          if ([beaconLastSeen objectForKey:beaconKey] == Nil) {
              NSLog(@"This beacon has never been seen before");
              shouldSendNotification = YES;
          }
          else {
              NSDate *lastSeen = [beaconLastSeen objectForKey:beaconKey];
              NSTimeInterval secondsSinceLastSeen = [now timeIntervalSinceDate:lastSeen];
              NSLog(@"This beacon was last seen at %@, which was %.0f seconds ago", lastSeen, secondsSinceLastSeen);
              if (secondsSinceLastSeen < 3600*24 /* one day in seconds */) {
                  shouldSendNotification = YES;
              }
          }

          if (shouldSendNotification) {
              [self sendLocalNotification];
          }
      }
  }