how to see iphone logging (NSLog) after app restart?

How could I view iphone logging (eg NSLog) after app restart?

I'm interested in the answer both for us开发者_开发技巧ing the (a) simulator and (b) an IOS device.

Background - In this case I have some issues no doubt in my code with how the application is supposed to launch, get previous state, and goto the controller/view it was at prior to it being terminated. Hence I want to see the logging as it starts up.

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For seeing device logs, you can use Organizer tool available in XCode(your device should be connected with system).

For simulator you will have to re-run application from XCode.

Thanks,