当我在该地区时，CLRegionState 是未知的

Question

我正在测试 iBeacon，我使用了 didDetermineState: 方法，当我在该区域内时，CLRegionState 是 CLRegionStateUnknown，谁能告诉我为什么？

我的蓝牙已打开并在我为 CLBeaconStateUnknown 定位信标时检测到信标，发送方和接收方在范围内（1 米），这是我的实现

-(void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{

    switch (state) {
    case CLRegionStateInside:
        currentBeconRegion = (CLBeaconRegion *)region;
        [self.locationManager startRangingBeaconsInRegion:currentBeconRegion];
        NSLog(@"INSIDE the Region");//not logging
        break;
    case CLRegionStateOutside:
        NSLog(@"OUTSIDE the Region");
        break;
    case CLRegionStateUnknown:
    default:
        NSLog(@"Region state UNKNOWN!!!"); //Logging on console
        statusLabel.text = @"Region state UNKNOWN!!!";
    //[self.locationManager stopRangingBeaconsInRegion:beaconRegion];           
    [self.locationManager startRangingBeaconsInRegion:beaconRegion];//Suceessfully ranging the beacon

        break;
    }
}

Answer 1

我之前也遇到过同样的问题，答案是我只是忘记打电话了：

[self.locationManager startMonitoringForRegion:beaconRegion];

一开始我错误地认为如果你开始测距：

[self.locationManager startRangingBeaconsInRegion:beaconRegion];

...并在locationManager:didRangeBeacons:inRegion: 方法中获取rssi、准确性和UUID 的数据，CLLocationManager 应该能够确定手机在那个区域，但显然不是。因此，当询问状态时，使用：

[self.locationManager requestStateForRegion:beaconRegion];

像你一样，我在locationManager:didDetermineState:forRegion: 中获得了该地区的CLRegionStateUnknown。

Answer 2

这篇文章是基于 iOS 8 编写的，将来可能会改变：

我在这里发布答案，以防其他人遇到与我相同的问题。我总共花了将近 4 个小时才意识到这是因为我的手机处于飞行模式。

tl;博士

如果开启飞行模式，则不会收到区域通知

Answer 3

我已经重新启动了我的两个设备并重新安装了应用程序，但仍然遇到同样的问题，而且它没有触发 didEnterRegion: 和 didExitRegion:。

- (void)viewDidLoad
 {

 [super viewDidLoad];    
//set peripheralManager delegate
self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self
                                                                 queue:nil
                                                               options:nil];


//Set location managaer delegate
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;


uuid = [[NSUUID alloc] initWithUUIDString:@"E01D235B-A5DB-4717-8D2F-28D5B48931F1"];

// Setup a new region with that UUID and same identifier as the broadcasting beacon
self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid identifier:@"testRegion"];
self.beaconRegion.notifyEntryStateOnDisplay = YES;
self.beaconRegion.notifyOnEntry = YES;
self.beaconRegion.notifyOnExit = YES;

}


#pragma mark -
#pragma mark - Peripheral Manager Delegates

-(void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral
{
switch (peripheral.state) {
    case CBPeripheralManagerStatePoweredOn:
        [self.locationManager startMonitoringForRegion:self.beaconRegion];
        break;
    case CBPeripheralManagerStatePoweredOff:
         statusLabel.text = @"Bluetooth is Off";
        [self clearFileds];
        [self.locationManager stopMonitoringForRegion:self.beaconRegion];
        break;
    case CBPeripheralManagerStateUnknown:
    default:
        statusLabel.text = @"Bluetooth is Unsupported";
        [self clearFileds];
        [self.locationManager stopMonitoringForRegion:self.beaconRegion];
        break;
   }

 }

#pragma mark -
#pragma mark - Location Manager Delecate Methods

-(void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region
{

[self.locationManager requestStateForRegion:self.beaconRegion];

}

 -(void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{

switch (state) {
    case CLRegionStateInside:
        currentBeconRegion = (CLBeaconRegion *)region;
        [self.locationManager startRangingBeaconsInRegion:currentBeconRegion];
        NSLog(@"INSIDE the Region");
        break;
    case CLRegionStateOutside:
        NSLog(@"OUTSIDE the Region");
        break;
    case CLRegionStateUnknown:
    default:
        NSLog(@"Region state UNKNOWN!!!");
        statusLabel.text = @"Region state UNKNOWN!!!";
       [self.locationManager stopRangingBeaconsInRegion:self.beaconRegion];
        break;
    }
}
-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region
{
//check if we're ranging the correct beacon
if (![self.beaconRegion isEqual:region]) { return;}

NSLog(@"didEnterRegion");
if([region isKindOfClass:[CLBeaconRegion class]])
{
    currentBeconRegion = (CLBeaconRegion *)region;
    if ([beaconRegion.identifier isEqualToString:@"testRegion"])
    {

        //send local notificaation
        UILocalNotification *notice = [[UILocalNotification alloc] init];
        notice.alertBody = @"Becoan Found!!!";
        notice.alertAction =@"View";
        [[UIApplication sharedApplication] presentLocalNotificationNow:notice];

        //srart raning beacon region
        [self.locationManager startRangingBeaconsInRegion:currentBeconRegion];


        }
    } 

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

if ([beacons count] > 0) {

    int major = [beacons.firstObject major].intValue;
    int minor = [beacons.firstObject minor].intValue;

    if (major != self.foundBeacon.major.intValue || minor !=     self.foundBeacon.minor.intValue) {
        NSLog(@"Found Beacon is: %@", [beacons firstObject]);
    }

    self.foundBeacon = [[CLBeacon alloc] init];
    self.foundBeacon = [beacons firstObject];
    //Set the ui
    [self setFileds];

 }
else //[beacon count]  0
{
    statusLabel.text = @"No becaons found";
    [self clearsFileds];
   // [self.locationManager stopMonitoringForRegion:beaconRegion];
    }

}
-(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region
{
NSLog(@"didExitRegion");
if([region isKindOfClass:[CLBeaconRegion class]])
{
    currentBeconRegion = (CLBeaconRegion *)region;
    if ([beaconRegion.identifier isEqualToString:@"testRegion"])
    {
        [self.locationManager stopMonitoringForRegion:currentBeconRegion];

     }
  }
}

Answer 4

您说您在“区域内”，但您怎么知道 iBeacon 真的被检测到了？蓝牙是否已打开并正常工作？用户是否在出现提示时允许访问位置信息？

我会启用 iBeacon 测距并记录检测到的任何内容，以验证您的设备是否确实看到了 iBeacon。我怀疑您会发现自己没有检测到任何东西，或者由于校准错误，iBeacon.proximity 字段可能会返回 CLProximityUnknown。

didDetermineState 会收到额外的呼叫，即使在您启动监控时（或者如果您在您所在地区设置了notifyEntryStateOnDisplay=YES 时唤醒屏幕）没有检测到信标。这是我认为您可能会获得CLRegionStateUnknown 值的唯一情况。我从来没有见过这个值返回，所以我很好奇它是在什么条件下发生的。找到我上面问题的答案可能会解决这个问题。请回来报告！