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POapplicationWillTerminate when is it called and when not
 

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    <p>Hi I have read several questions on SO about applicationWillTerminate getting called and not getting called.</p> <p>I wanted to summarize what I understood as there are several posts that speak differently.</p> <ol> <li><p>For IOS (without multitasking) it is called always when home button is pressed.</p></li> <li><p>For IOS 4 and above</p> <p>a. it is <strong>not</strong> called when pressing home button (as the app moves to background)</p> <p>b. it is called when closing the app from the multi tasking dock and if the app has a sudden terminate flag in info.plist disabled else it is not called. <strong>( I set the "Application should get App Died events" and even then on closing the app from the multitasking dock the terminate function did not get called)</strong></p></li> </ol> <p>Based on that I had a couple of questions</p> <p>Is it a good practise to set the Application should get App Died events flag? ( I set the "Application should get App Died events" and even then on closing the app from the multitasking dock the terminate function did not get called)</p> <p>or</p> <p>Is registering for "UIApplicationWillTerminateNotification" a better thing to do than the info.plist setting?</p> <p>Basically I need to do some work only when the app terminates and NOT when it moves to background.</p> <p>or</p> <p>EDIT (1): When the app is terminated the following is sent to the APP. How do I catch it?</p> <p>Program received signal: “SIGKILL”.</p> <p><strong>EDIT (2):</strong></p> <p>Please note : It is not getting called in IOS 4 and above when removing from the multitasking dock. You might think it is. But in my case it is not.</p> <p>I am asking if anyone knows why? Is there something else I am missing. </p> <p>Also Note I set the "Application should get App Died events" and even then it is not getting called.</p> <p><strong>EDIT (3):</strong></p> <p>The answer for the following question also did not work. <a href="https://stackoverflow.com/questions/4320557/applicationwillterminate-does-not-get-invoked">applicationWillTerminate does not get invoked</a></p> <p>Anybody facing the similar issue as me?</p>
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    1. COI have the same problem. One remark: you could not catch SIGKILL, this signal is handled by the OS and is equivalent with removing all the app resources (so no way for your app to catch this signal).
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    2. COthanks for that. So we are back to finding how to make "applicationWillTerminate" in IOS 4 and above.
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