How can I alert a user that they need to do something without using a push notification? For instance, if I have an alarm clock app, how can I get it to ring when it is not already running without using a push notification?
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How can I alert a user that they need to do something without using a push notification? For instance, if I have an alarm clock app, how can I get it to ring when it is not already running without using a push notification?
You can’t. As of writing, iPhone OS does not support background processes. (There wouldn’t be any need for push notifications if iPhone OS supported background processes!) You can alert the user while your application is running using
UIAlertView, but once your app is closed, you can’t do anything.As @Henrik P. Hessel mentions, it is rumoured that background processes will finally be supported in iPhone OS 4.0. Rumours also suggest that iPhone OS 4.0 will be previewed at the January 27 Apple Special Event. We’ll soon see whether they’re true…