iphone - iOS 7 Ranging beacons: Sometimes ranging is Unavailable, and the only solution is reboot the device -

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i'm working beacons on ios 7.x, works fine when call startranging..., device launch me error kclrangingunavailable, after check wifi disabled, restart bluetooth, , start , stop airplain mode, solution of problem reboot phone.

this sourcecode: @interface rbtmainviewcontroller () @property (nonatomic, retain) cllocationmanager* locationmanager; @end

@implementation rbtmainviewcontroller  - (id)initwithnibname:(nsstring *)nibnameornil bundle:(nsbundle *)nibbundleornil {     self = [super initwithnibname:nibnameornil bundle:nibbundleornil];     if (self) {          _locationmanager=[[cllocationmanager alloc] init];         _locationmanager.delegate=self;          nsuuid *estimoteuuid = [[nsuuid alloc] initwithuuidstring:@"00001111-2222-3333-4444-555566667777"];         clbeaconregion *region = [[clbeaconregion alloc] initwithproximityuuid:estimoteuuid                                                                     identifier:@"proves range"];          if ([cllocationmanager ismonitoringavailableforclass:[clbeaconregion class]])         {             [_locationmanager startmonitoringforregion:region];             [_locationmanager startrangingbeaconsinregion:region];         }         else         {             nslog(@"this device not support monitoring beacon regions");         }       }     return self; } ... - (void)locationmanager:(cllocationmanager *)manager monitoringdidfailforregion:(clregion *)region witherror:(nserror *)error{     nslog(@"monitoringdidfailforrange: %@ witherror: %@", region, error);  } - (void)locationmanager:(cllocationmanager *)manager rangingbeaconsdidfailforregion:(clbeaconregion *)region witherror:(nserror *)error{     nslog(@"rangingbeaconsdidfailforrange: %@ witherror: %@", region, error); }  - (void)locationmanager:(cllocationmanager *)manager didstartmonitoringforregion:(clregion *)region{     nslog(@"monitoringstart: %@", region); }  - (void)locationmanager:(cllocationmanager *)manager didrangebeacons:(nsarray *)beacons inregion:(clbeaconregion *)region{     nslog(@"rangingbeacons: %@ in (%@)", beacons, region);  } @end

and ouput in iphone when errors happens:

2014-04-14 13:20:18.628 rangingbeaconstest[9042:60b] monitoringstart: clbeaconregion (identifier:'proves range', uuid:<__nsconcreteuuid 0x15554170> 00001111-2222-3333-4444-555566667777, major:(null), minor:(null)) 2014-04-14 13:20:23.752 rangingbeaconstest[9042:60b] rangingbeaconsdidfailforrange: clbeaconregion (identifier:'proves range', uuid:<__nsconcreteuuid 0x15565390> 00001111-2222-3333-4444-555566667777, major:(null), minor:(null)) witherror: error domain=kclerrordomain code=16 "the operation couldn’t completed. (kclerrordomain error 16.)"

this code error, unavailable ranging. can me problem?

thanks.


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