Xcode signal to end app

Does anyone knows what signal Xcode sends to kill a running program? I need an handler to do some cle开发者_Python百科anup before the programs gets killed. I already tried SIGINT and SIGTERM but it doesn't seem to work.

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It sends sinal SIGKILL. To verify you can open any application in debug mode and check the console when you stop the task.

However if it is kill -9 you cannot trap the signal.

What kind of clean up you want to do? I don't think there is any need to handle that event as you are doing it on purpose from XCode. If you are trying to send this signal to a process from outside Xcode like Terminal then in makes sense.

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You shouldn't do that.

Use the appropriate delegate methods of your AppDelegate.