How to unlock iOS screen programmatically?

Question

I'm currently exploring creating a jailbreak tweak. I want to unlock the phone screen. How is this done? What private API can be used to achieve this on iOS 7?

Answer 1

If we are talking about jailbreak then you can write a SpringBoard tweak that does this (iOS 7 only)

[[objc_getClass("SBBacklightController") sharedInstance] turnOnScreenFullyWithBacklightSource:0];
[[objc_getClass("SBLockScreenManager") sharedInstance] unlockUIFromSource:0 withOptions:nil];

Without passcode lock the code will turn on the screen and unlock the device. With passcode it will turn on the screen and request passcode.