How do I tell if my iPhone app is running when a Push Notification is received?

Question

I am sending Push Notifications to my iPhone app, and I\'d like a different set of instructions to execute depending on whether the app is already launched or not. I\'m new

Answer 1

Depending upon what you mean by "launched", you are either looking for:

• Kevin's answer above (differentiates between launched or not launched)
• or this (differentiates between suspended or active, but already launched):

Use a flag that is set true when the application becomes active, and false when the application is not active.

Flag (in header file [.h]):

BOOL applicationIsActive;

Code (in implementation file [.m]):

- (void)applicationDidBecomeActive:(UIApplication *)application {
    applicationIsActive = YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
    applicationIsActive = NO;
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    if (applicationIsActive) {
        // Handle notification in app active state here
    }
    else {
        // Handle notification in app suspended state here
    }

This works because when the application is suspended, the OS calls "applicationDidReceiveRemoteNotification" before it calls "applicationDidBecomeActive" during the "wake-up" process.

The "complete" answer is actually Kevin's answer plus this answer.

Hope this helps.