ios - 如何在收到本地通知数据后创建传递给使用 objective-c 的主视图 Controller ？

Question

我已经使用 Objective C 为 iPhone 应用程序创建了本地通知流程。我想将 didReceiveLocalNotification 之后的数据传递给主视图 Controller 。

- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif {


    if (app.applicationState == UIApplicationStateInactive ) {
        NSLog(@"app not running");

       // I need to pass the data to main view controller 


    }else if(app.applicationState == UIApplicationStateActive )  {
        NSLog(@"app running");


        // I need to pass the data to main view controller

    }

    NSLog(@"Recieved Notification %@",notif);  // Handle the notificaton when the app is running 

}

Answer 1

你可以使用 NSNotificationCenter 来传递数据。

在 MainViewController.m

在 viewDidLoad

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

-(void)notifMainController:(NSNotification *)notif
{
    NSLog(@"%@",notif.object);
}

在 AppDelegate 中

- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif 
{

 NSLog(@"Recieved Notification %@",notif);  // Handle the notificaton when the app is running 

if (app.applicationState == UIApplicationStateInactive ) 
{
    NSLog(@"app not running");
   // I need to pass the data to main view controller 
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            MainViewController *obj = [[MainViewController alloc]initWithNibName:@"MainViewController" bundle:nil];
            [self.navC pushViewController:obj animated:NO];
            [[NSNotificationCenter defaultCenter] postNotificationName:@"notifMainController" object:@"your string"];
        });

}
else if(app.applicationState == UIApplicationStateActive )  
{
    NSLog(@"app running");
    // I need to pass the data to main view controller
    [[NSNotificationCenter defaultCenter] postNotificationName:@"notifMainController" object:@"your string"];
}

}

您可以在 [[NSNotificationCenter defaultCenter] postNotificationName:@"notifMainController"object:@"your string"]; 中传递字符串，就像在对象中这样。也许这会对您有所帮助。