Question

我正在使用CLLocationManager进行示例项目。

我致电startMonitoringForRegion。然后，我开始用其他设备模拟信标，并调用didEnterRegion。

在didEnterRegion中，我致电startRangingBeaconsInRegion并且工作正常。

然后，我暂停信标发射器并调用didExitRegion。在didExitRegion我致电stopRangingBeaconsInRegion。

如果我再次启动信标发射器，则不会调用didEnterRegion。

我在Apple文档中找到了这个：

stopRangingBeaconsInRegion：停止指定信标区域的通知传送。

stopRangingBeaconsInRegion可能会停止受监控区域的通知吗？

我在没有stopRangingBeaconsInRegion的情况下尝试相同并且工作正常。

谢谢

添加更多信息：

NSUUID *UUID = [[NSUUID alloc] initWithUUIDString:@"77777777-1717-2727-7777-777777777777"];
NSString *identifier = @"MyBeaconRegion";
CLBeaconRegion *region = [[CLBeaconRegion alloc] initWithProximityUUID:UUID identifier:identifier];
[_locationManager startMonitoringForRegion:region];

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region {
    NSLog(@"didEnterRegion");
    [_locationManager startRangingBeaconsInRegion:(CLBeaconRegion*)region];
    NSLog(@"StartRangingBeacons");
}

- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
    NSLog(@"didExitRegion");
    [_locationManager stopRangingBeaconsInRegion:(CLBeaconRegion*)region];
    NSLog(@"StopRangingBeacons");

}

- (void)locationManager:manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region {
    for (CLBeacon *beacon in beacons) {
        NSLog(@"Ranging Beacon: %@ and proximity: %f", beacon.proximityUUID.UUIDString, beacon.accuracy);
    }
}

还有一些日志：

2015-01-13 09:46:30.559 RegionMonitoring[188:5314] didEnterRegion
2015-01-13 09:46:30.561 RegionMonitoring[188:5314] StartRangingBeacons
2015-01-13 09:46:31.579 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.008799
2015-01-13 09:46:32.575 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.011362
2015-01-13 09:46:33.580 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.012814
2015-01-13 09:46:34.580 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.012909
2015-01-13 09:46:35.579 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.012915
2015-01-13 09:46:36.579 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.011501
2015-01-13 09:46:37.576 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.010177
2015-01-13 09:46:38.576 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.013618
2015-01-13 09:46:39.578 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 09:46:40.573 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 09:46:41.578 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 09:46:42.575 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 09:46:43.578 RegionMonitoring[188:5314] didExitRegion
2015-01-13 09:46:43.579 RegionMonitoring[188:5314] StopRangingBeacons
2015-01-13 09:46:43.581 RegionMonitoring[188:5314] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000

然后，我打开灯塔，没有任何反应。

如果我尝试使用此代码：

- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
    NSLog(@"didExitRegion");
    //[_locationManager stopRangingBeaconsInRegion:(CLBeaconRegion*)region];
    //NSLog(@"StopRangingBeacons");
}

工作正常：

2015-01-13 10:15:45.945 RegionMonitoring[364:11017] didEnterRegion
2015-01-13 10:15:45.947 RegionMonitoring[364:11017] StartRangingBeacons
2015-01-13 10:15:46.960 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:15:47.960 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:15:48.961 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:15:49.958 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:15:50.960 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:51.958 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:52.960 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:53.956 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:54.960 RegionMonitoring[364:11017] didExitRegion
2015-01-13 10:15:54.962 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:55.955 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:56.960 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:15:57.959 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:02.960 RegionMonitoring[364:11017] didEnterRegion
2015-01-13 10:16:02.962 RegionMonitoring[364:11017] StartRangingBeacons
2015-01-13 10:16:02.963 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:16:02.971 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:16:03.979 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.040842
2015-01-13 10:16:04.979 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.036694
2015-01-13 10:16:05.978 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: 0.036051
2015-01-13 10:16:06.977 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:07.977 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:08.974 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:09.977 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:10.973 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:11.977 RegionMonitoring[364:11017] didExitRegion
2015-01-13 10:16:11.978 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:12.974 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000
2015-01-13 10:16:13.977 RegionMonitoring[364:11017] Ranging Beacon: 77777777-1717-2727-7777-777777777777 and proximity: -1.000000

Answer 1

代码看起来正确。我怀疑发生了什么事情，你只是在停止测距后看到新检测的延迟。如果你等了15分钟，你会看到第二次区域进入事件吗？

在前台测距绝对加快了信标检测的速度，因为它告诉操作系统做恒定的蓝牙扫描以寻找信标。测距会导致检测在几秒钟内发生。如果没有测距，iOS使用15分钟的扫描周期来寻找信标，这可能会被iPhone 5+上的蓝牙硬件过滤器加速。硬件过滤器不是100％可靠，因此检测时间最长可延迟15分钟。

详情请见此处： http://developer.radiusnetworks.com/2013/11/13/ibeacon-monitoring-in-the-background-and-foreground.html

Answer 2

每startMonitoringForRegion is not calling didEnterRegion if the app is started within the region，＆＃34; didEnterRegion是一个阈值事件，在输入某个区域时触发。想一想：一个表明你在一个地区内的事件会不断发生。＆＃34;也许它没有被解雇的原因是因为当你致电startRangingBeaconsInRegion时，你已经在该地区，因此didEnterRegion没有被召唤。

stopRangingBeaconsInRegion可能会停止受监控区域的通知吗？

2 个答案: