打开通知后从AppDelegate重新加载ViewController

Question

I'm currently trying to reload my ViewController after opening a Notification from the notification center. In my AppDelegate I'm using this function:

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler{

if(application.applicationState == UIApplicationStateActive) {

    //app is currently active, can update badges count here

}else if(application.applicationState == UIApplicationStateBackground){


}else if(application.applicationState == UIApplicationStateInactive){

    //CODE

    //REFRESH VIEW HERE, AFTER THE CODE ABOVE

}

}

How can this be done? This is my first experience with Objective-C, so please don't be rude with me ihihihi.

Thanks.

Answer 1

You can use the NSNotificationCenter to let your UIViewController know you have some updated data to show.

In the UIViewController register to the notification center for your specific notification and then update your view.

In the app delegate:

[[NSNotificationCenter defaultCenter] 
    postNotificationName:@"NEW_DATA_NOTIFICATION" 
    object:nil];

In your UIViewController , in the viewDidLoad :

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

Also in your UIViewController :

- (void) receiveNewDataNotification:(NSNotification *) notification {
    if ([[notification name] isEqualToString:@"NEW_DATA_NOTIFICATION"]) {
        NSLog(@"Received New Data Notification!");
        // Update your view here...
    }
}