startMonitoringForRegion when App close

问题

I am using startMonitoringForRegion to monitor specific region. When App is not running I have successfully generated a local notification when a user enters/leaves a particular location by comparing [launchOptions objectForKey:@"UIApplicationLaunchOptionsLocationKey"] in AppDelegate.

But now I am not able to understand how can I know that a user enters in a location or leaves a location. I am not able to find a way to check the response. Can I show the response in the alert body? I searched in internet but unable to find any tutorial that have written some code in AppDelegate.

回答1:

you can use location manager delegate method

- (void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region{

    if (state == CLRegionStateInside) {

        // We entered a region
         NSLog(@"Inside region");
 if([[UIApplication sharedApplication] applicationState] == UIApplicationStateBackground){

            UILocalNotification *notification = [[UILocalNotification alloc] init];
            notification.alertBody = @"Region Detected";
            notification.soundName = @"Default";
            [[UIApplication sharedApplication] presentLocalNotificationNow:notification];


    } else if (state == CLRegionStateOutside) {

       // We are outside region
        NSLog(@"Outside region");
    }
}

IN APPDELEGATE

-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
    [[NSNotificationCenter defaultCenter] postNotificationName:@"PerformAction" object:nil userInfo:nil];
}

IN your ViewController viewDidLoad Method :

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(performAction) name:@"PerformAction" object:nil];

In your same viewController add the following method and perform ur action

-(void)performAction
{
  // perform your action
}

来源：https://stackoverflow.com/questions/28831572/startmonitoringforregion-when-app-close

标签

ios

cllocationmanager