基于位置的'本地通知'在'后台'工作，但不在'前台'

Question

通知应该在位置接近时激活，但它只在后台工作。即使触发事件同时发生在前景和背景中。

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region {
//implement local notification:
UIApplication *app = [UIApplication sharedApplication];
UILocalNotification *notification = [[UILocalNotification alloc] init];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
if (notification == nil)
    return;
notification.fireDate = [NSDate date];
notification.timeZone = [NSTimeZone defaultTimeZone];
notification.alertBody = [selectedTask discription];
notification.alertAction = [selectedTask taskName];
notification.soundName = UILocalNotificationDefaultSoundName;
notification.applicationIconBadgeNumber = 1;
[app presentLocalNotificationNow:notification];
localNotification = nil;
}

Answer 1

从didReceiveLocalNotification方法内部，你可以向用户显示一个警告，因为如果应用程序在前台，通知不会被处理。

UIAlertView *alert = [[UIAlertView alloc]
        initWithTitle: @"Something"
        message: @"Something else you want to tell the user"
        delegate:self
        cancelButtonTitle:@"OK"
        otherButtonTitles:nil];
[alert show];