Question

我的问题是：如何在手机锁定（没有显示屏开启）或背景设置时从中央启用连续监听？

首先，我正在使用iBeaconDemo由Christopher Mann @ https://github.com/csmann/iBeaconDemo提供，我不赞成编写这个演示，但我用它来理解iBeacons和Region Monitoring。这是一个很棒的演示，但我希望它能够启用后台监控，以便在您进入近距离时显示本地通知。

我在我的Capabilities（info.plist）文件中启用了蓝牙中心，蓝牙 - 外围设备和位置，并将.notifyOnDisplay，notifyOnEntry和notifyOnExit设置为YES，并且发现我在应用程序位于前台时获得了结果或在锁定屏幕上（在手机锁定时按下主屏幕按钮）但在后台（手机未锁定）或手机锁定（无显示）时无法进行监听。

这是我的appDelegate的didEnterBackground方法（注意：这是一个不同的本地通知，每次都能正常工作但与我进入该区域时想要显示的通知不一样：

    - (void)applicationDidEnterBackground:(UIApplication *)application {
    NSLog(@"Application entered background state.");
    [[UIApplication sharedApplication] cancelAllLocalNotifications];

    // create local notification and present it immediately
    UILocalNotification *notification = [self createLocalNotification:@"Bring app back to foreground"];
    [[UIApplication sharedApplication] presentLocalNotificationNow:notification];
}

以下是我想在后台发布的通知，一旦我进入该区域，我只需要弹出1个通知（为了测试目的，每个放1个）：

    - (void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region {

    // identify closest beacon in range
    if ([beacons count] > 0) {
        CLBeacon *closestBeacon = beacons[0];
        if (closestBeacon.proximity == CLProximityImmediate) {
            /**
             Provide proximity based information to user.  You may choose to do this repeatedly
             or only once depending on the use case.  Optionally use major, minor values here to provide beacon-specific content
             */

            [self fireUpdateNotificationForStatus:[NSString stringWithFormat:@"Range: %li \n Beacon Name: %@ \n You are in the immediate vicinity of the Beacon.", (long)closestBeacon.rssi, ((CLBeaconRegion*)region).identifier]];

            [[UIApplication sharedApplication] presentLocalNotificationNow:[self createLocalNotification:@"Immediate LN"]];


        } else if (closestBeacon.proximity == CLProximityNear) {
            // detect other nearby beacons
            // optionally hide previously displayed proximity based information
            [self fireUpdateNotificationForStatus:[NSString stringWithFormat: @"Range: %li \n Beacon Name: %@ \n There are Beacons nearby.", (long)closestBeacon.rssi, ((CLBeaconRegion*)region).identifier]];

            [[UIApplication sharedApplication] presentLocalNotificationNow:[self createLocalNotification:@"Near LN"]];

        } else if (closestBeacon.proximity == CLProximityFar) {

            [self fireUpdateNotificationForStatus:[NSString stringWithFormat:@"Range: %li \n Beacon Name: %@ \n You are far away from the %@th beacon in store %@!", (long)closestBeacon.rssi, ((CLBeaconRegion*)region).identifier, closestBeacon.minor, closestBeacon.major]];

            [[UIApplication sharedApplication] presentLocalNotificationNow:[self createLocalNotification:@"Far LN"]];

        }

    } else {
        // no beacons in range - signal may have been lost
        // optionally hide previously displayed proximity based information
        [self fireUpdateNotificationForStatus:@"There are currently no Beacons within range."];
    }
}

最后，这是fireUpdateNotificationsForStatus方法，这可能有用：

    - (void)fireUpdateNotificationForStatus:(NSString*)status {
    // fire notification to update displayed status
    [[NSNotificationCenter defaultCenter] postNotificationName:kLocationUpdateNotification
                                                        object:Nil
                                                      userInfo:@{@"status" : status}];
}

如果还有其他任何有用的帮助，请随时告诉我。谢谢你的时间！

Answer 1

假设用户已收到通知（您使用日志记录而不是通知对此进行了测试，对吗？）并且您的问题是后台处理：

iOs和后台扫描有点古怪，你可以做一些事情：

在您的应用中设置了UiBackgroundModes =位置权限
region.notifyEntryStateOnDisplay = YES确保您在屏幕解锁时收到didRangeBeacons（您好像有）
locationManager.pausesLocationUpdatesAutomatically = NO;否则当iOs决定用户不再移动时偶尔会关闭测距
也使用startUpdatingLocation，expectAccuracy = kCLLocationAccuracyThreeKilometers;你也会得到无用的GPS线，但它显然让iOs不能停止灯塔测距。

另见http://airfy.svbtle.com/battery-friendly-indoor-positioning-with-ibeacon

蓝牙中央区域监控背景和/或锁定（无显示）

1 个答案: