Handling Push Notifications when App is NOT runnin

问题:

I'm able to send push notifications to my IOS device. But when I click on that notification it just opens the app. No message is shown inside the app.

Code used by me:

if (application.applicationState == UIApplicationStateActive) {

    NSString *cancelTitle = @"Close";

    NSString *showTitle = @"Show";

    NSString *message = [[userInfo valueForKey:@"aps"] valueForKey:@"alert"];

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Some title"

                                                        message:message

                                                       delegate:self

                                              cancelButtonTitle:cancelTitle

                                              otherButtonTitles:showTitle, nil];

    [alertView show];

    [alertView release];

} else {

    //Do stuff that you would do if the application was not active

}

But unable to show my message with the help of above code. Above code only works when my app is open that is in foreground state than only this alert gets displayed else not.

Please help.

Thanks.

回答1:

When application is totally killed get notification code

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if (launchOptions != nil)
{
     //opened from a push notification when the app is closed
    NSDictionary* userInfo = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
    if (userInfo != nil)
    {
         NSLog(@"userInfo->%@",[userInfo objectForKey:@"aps"]);
         //write you push handle code here

    }

}
}

For more go through this link: Handling Push Notifications when App is Terminated

回答2:

From the apple documentation

https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/Introduction.html

"When your app must be launched to receive a notification, UIKit includes the UIApplicationLaunchOptionsLocalNotificationKey or UIApplicationLaunchOptionsRemoteNotificationKey key in the launch options dictionary passed to your app delegate’s application:willFinishLaunchingWithOptions: and application:didFinishLaunchingWithOptions: methods. The presence of those keys lets you know that there is notification data waiting to be handled and gives you a chance to configure your app’s interface appropriately. You do not need to handle the notification in these methods, though. After your app is running, UIKit calls other methods of your app delegate, such as the application:didReceiveLocalNotification: method, to give you an opportunity to process the notification data. Which methods are called depends on which methods you implemented and whether the user interacted with the system UI for the message."

So check if your app has been launched due to a notification and if so display the dialog.

回答3:

Handling Push Notifications when App is NOT running (or Totally Killed)

I'm posting this solution as it worked for me.

Go to your AppDelegate.m file.

Step 1: Write this code inside this function:

-(BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{

  UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];

 if (localNotif) {

        NSString *cancelTitle = @"Close";
        NSString *showTitle = @"OK";
        NSString *message = [[localNotif valueForKey:@"aps"] valueForKey:@"alert"];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Message Received"
                                                            message:message
                                                           delegate:self
                                                  cancelButtonTitle:cancelTitle
                                                  otherButtonTitles:showTitle, nil];
        [alertView show];


    }

}

Step 2:

Insert This full code:

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{

NSLog(@"%s..userInfo=%@",__FUNCTION__,userInfo);

/**
     * Dump your code here according to your requirement after receiving push
     */

    if (application.applicationState == UIApplicationStateActive) {
        NSString *cancelTitle = @"Close";
        NSString *showTitle = @"OK";
        NSString *message = [[userInfo valueForKey:@"aps"] valueForKey:@"alert"];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Message Received"
                                                            message:message
                                                           delegate:self
                                                  cancelButtonTitle:cancelTitle
                                                  otherButtonTitles:showTitle, nil];
        [alertView show];

    } 

    else if(application.applicationState == UIApplicationStateBackground){

        //app is in background, if content-available key of your notification is set to 1, poll to your backend to retrieve data and update your interface here


        NSString *cancelTitle = @"Close";
        NSString *showTitle = @"OK";
        NSString *message = [[userInfo valueForKey:@"aps"] valueForKey:@"alert"];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Message Received"
                                                            message:message
                                                           delegate:self
                                                  cancelButtonTitle:cancelTitle
                                                  otherButtonTitles:showTitle, nil];
        [alertView show];

    }


    else if(application.applicationState == UIApplicationStateInactive){

        //app is in background, if content-available key of your notification is set to 1, poll to your backend to retrieve data and update your interface here


        NSString *cancelTitle = @"Close";
        NSString *showTitle = @"OK";
        NSString *message = [[userInfo valueForKey:@"aps"] valueForKey:@"alert"];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Message Received"
                                                            message:message
                                                           delegate:self
                                                  cancelButtonTitle:cancelTitle
                                                  otherButtonTitles:showTitle, nil];
        [alertView show];

    }


}

This whole code will work whether app is Active, InActive or Totally Killed. It will give you AlertView for push messages.

回答4:

I think there is one easy solution.

1. You can store some flag in the app once when you receive notification you can check how to do it here
2. After that on the you have to detect when you come from background maybe like here

If you want to show the alert only when you open the application from the notification then maybe you this is your solution

回答5:

The best way to handle things like this is to use deep linking within your APN. That will let you embed data that can then be handled within your app and direct the user to a specific event.

Otherwise, you are limited to using the ApplicationDidEnterForeground method from your app delegate. Just put your alertView code in there and anytime your application is brought into the foreground that will run.