在我的应用程序（部署目标5.1）中，我使用CoreLocation设置提醒功能，它将基本搜索附近的项目（附加位置）作为设备更新其当前位置。
此功能在此阶段工作不稳定，有时无论设备处于活动状态，暂停状态还是终止状态，它都无法正常工作。我意识到委托方法locationManager:didUpdateToLocation:fromLocation:没有得到电话。
有没有人可以指出我的方向让这个东西正常工作？
这是我对CLLocationManager的设置
sharedLocationManager = [[CLLocationManager alloc]init];
[ESLocationManager defaultManager].delegate = someDelegateClassInstance;
[[ESLocationManager defaultManager] setDesiredAccuracy:kCLLocationAccuracyHundredMeters];
[[ESLocationManager defaultManager] startMonitoringSignificantLocationChanges];
委托回调的实现
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
// If it's a relatively recent event, turn off updates to save power
NSDate* eventDate = newLocation.timestamp;
NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
if (abs(howRecent) < 20.0) {
// If the event is recent,find nearby items.
NSLog(@"latitude %+.6f, longitude %+.6f\n",
newLocation.coordinate.latitude,
newLocation.coordinate.longitude);
//reload nearby list
NSArray *nearbyItems = [self nearbyItemsForLocation:newLocation];
if (nearbyItems && nearbyItems.count ) {
UIApplicationState appState = [[UIApplication sharedApplication] applicationState];
if (appState != UIApplicationStateActive) {
[[UIApplication sharedApplication] presentLocalNotificationNow:[self localNotificationForItems:nearbyItems]];
}
}
}
}