ios - 屏幕关闭时的 iBeacon 事件

Question

我正在尝试触发基于 iBeacon 的事件

当应用程序在前台、后台运行但未挂起时(通过电源按钮关闭屏幕)，它工作正常

我可以在锁定屏幕上看到 NSLog 消息，但在设备屏幕关闭时看不到。

有办法吗？

AppDelegate.m:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    NSLog(@"applicationDidFinishLaunching");

    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.delegate = self;

    [_locationManager requestAlwaysAuthorization];

    CLBeaconRegion *region;

    region = [[CLBeaconRegion alloc] initWithProximityUUID:[[NSUUID alloc] initWithUUIDString:@"EBEFD083-70A2-47C8-9837-E7B5634DF524"] major: 9 minor: 103 identifier: @"region1"];
    region.notifyEntryStateOnDisplay = YES;
    region.notifyOnEntry = YES;
    region.notifyOnExit = YES;
    [_locationManager startMonitoringForRegion:region];
    [_locationManager startRangingBeaconsInRegion:region];

    return YES;
}

- (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);
    }
}

- (void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region
{
    if ( beacons.count > 0 )
    {
        NSLog(@"locationManager didRangeBeacons: %@",beacons.description);
    }
}

Info.plist(仅相关部分):

        <key>NSLocationAlwaysUsageDescription</key>
        <string>app location requested</string>
        <key>UIBackgroundModes</key>
        <array>
            <string>location</string>
            <string>voip</string>
            <string>bluetooth-peripheral</string>
            <string>bluetooth-central</string>
            <string>external-accessory</string>
        </array>

Answer 1

将 LocationManager 的 pausesLocationUpdatesAutomatically 属性设置为“NO”，将此属性设置为 NO 后，位置服务永远不会关闭。但您必须小心，因为将此属性设置为 NO 会显着增加设备的功耗。