User-friendly way to ask about locking the iPhone screen

I have an app where it will be a setting whether or not to allow the screen to auto-lock during idle periods.

My question: what's the user-friendly (and user-understandable) way to present the option. It'll be in a UI开发者_开发技巧TableView with a UISwitch, so i'll look somewhat like:

What's the best language to use? Keep screen on Prevent auto-lock

Is there a common-practice to adhere to?

Something else?

I certainly like "Disable Auto-Lock" with a UISwitch, like you have in your screenshot. I've seen this used in a number of apps, and it makes sense to me.