iPhone中的地理栅栏

Question

我写了一个地理围栏应用程序，当它在前台和后台运行时工作得很好。如何使该应用程序工作，并发送有关地理围栏的通知，即使该应用程序被杀死？

Answer 1

当应用程序被杀死时，iOS仍然会监控地理栅栏。如果您进入或退出一个，您的AppDelegate application:didFinishLaunchingWithOptions:将被调用。然后，您可以使用启动选项检测这是否是位置触发器：

 if (launchOptions[UIApplicationLaunchOptionsLocationKey])
    {
       //Re-Setup your location manager and take appropriate action. The locationManager:didEnterRegion: locationManager:didExitRegion delegate of the new location manager will be triggered.
    }

Answer 2

您也可以在开始监控您的区域时创建通知：

    [self.locationManager startMonitoringForRegion:region];

    UILocalNotification *regionNotification = [UILocalNotification new];
    NSString *notificationString = [NSString stringWithFormat:@"You are approaching near region%@",region.identifier];
    regionNotification.alertBody = notificationString;
    regionNotification.alertAction = @"Show me the region details.";
    regionNotification.region = region;
    regionNotification.regionTriggersOnce = NO;
    regionNotification.userInfo = [NSDictionary dictionaryWithObject:region.identifier forKey:@"regionIdentifier"];
    [[UIApplication sharedApplication]scheduleLocalNotification:regionNotification];

此通知适用于所有3种情况：

当应用程序在foreground

• when中时，应用程序在background

• when中时，应用程序是

这三种情况的通知回调都是在UIApplicationDelegate方法- application:didReceiveLocalNotification:中接收的

-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
    //Do whatever you want after you receive the notification
}