UILocalNotification and alertLaunchImage

Hmmm……

A question about UILocalNotification and the notificaton's alertLaunchImage.

My app uses UILocalNotifiaction(s) to get users' attention. As usual, an alert is presented with "Action" and "Close" buttons. When the user taps Action, the image specified by alertLaunchImage is presented. The alertLaunchImage is a screenshot of of one of the views of the app which is shown after the data is initialized when launched normally.

Here are the 3 cases when the notification is delivered:

1. App is running in foreground - no alert, no launchImage is shown as designed. No problems.

2. If my app is running in background when the notification is delivered, the launchImage works like a charm. No problems. The launchImage with no app-related data is shown and then the app fills up the data. This part works seamlessly.

3. However, if开发者_运维问答 the app is not running when the notification is delivered, the sequence is confusing - or I missed something. The app gets launched and shows the alertLaunchImage instead of the Default image. Then is goes thru several other screens (as part of initialization and data processing) before the actual screen (live version of alertLaunchImage) is shown.

This can get very confusing to the user. My question comes in here. How can this be avoided?

R/- Sam.!

you can try cleaning up the alert view settings in applicationWillTerminate:

According to the UIApplicationDelegate reference applicationWillTerminate::

"This method lets your application know that it is about to be terminated and purged from memory entirely. You should use this method to perform any final clean-up tasks for your application, such as freeing shared resources, saving user data, invalidating timers, and storing enough application state to reconstitute your application’s interface when it is relaunched"

HTH,

Oded

If your app is launched by a local notification, you will receive that notification in the options passed to -application:didFinishLaunchingWithOptions:. Based on that, you can write code that navigates to the correct screen without animations.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{  
    UILocalNotification *localNotification = [launchOptions valueForKey:UIApplicationLaunchOptionsLocalNotificationKey];
    if (localNotification != nil) {
        // startup by local notification
    } else {
        // normal startup
    }
}