Programmatically locking iphone (>iOS7)

Question

i am on a research to find ways to lock iphone programmatically . I have come across a private api " graphicsservices.framework " which they say it works only on devices below iOS7. Is there any possible way to do this in devices >iOS7 ?? i know Apple wont accept this , but any private frameworks other than " graphicsservices.framework " ? . Thanks in advance.

Answer 1

I am sorry to say but this is not possible in non jailbroke iPhones. There may be a private API for it but apple would reject an app using it, So careful for the same.

You can also see reference 1 and reference 2.