CLLocationManager didEnterRegion:在应用程序暂停时使用iBeacon

我正在尝试唤醒我的应用程序(重新启动它),当它进入我定义的信标区域但我无法让它工作.这是我正在使用的步骤和代码.

将"位置更新"背景模式设置为YES.

监控我的CLBeaconRegion

NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:@"EBEFD083-70A2-47C8-9837-E7B5634DF524"];
    beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid identifier:@"daRegion"];
    beaconRegion.notifyEntryStateOnDisplay = NO;
    beaconRegion.notifyOnEntry = YES;
    beaconRegion.notifyOnExit = YES;
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    [self.locationManager startMonitoringForRegion:beaconRegion];

实现委托方法

- (void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region;
- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region;
- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region;

我可能遗失的任何东西？我已阅读文档,博客文章,论坛,似乎没有任何工作.这是我读过的网站之一,这是另一个.