如何在提示核心位置时获得用户响应？

When I install my application on the iPhone it asks for the current location with the options "Don't allow" and "Ok" in an alert. How do I find out which option was chosen? I also want to show this option only once. If the user chooses to allow their current location to be found, I want the device to automatically get the location in the background.When I install my application on the iPhone it