如何将UILabel文本居中?

Now I've seen a lot of examples that teach you either how to center the UILabel Text in the middle of the screen, but that's not what I'm asking for. I'm asking on how to make sure that the text of UILabel remains half way between the left and right bounds of the screen and All I have to do is make adjustments Vertically. I have the following:Now I've seen a lot of examples that teach you