Storyboard preview differs from simulator

Question

I'm currently trying to grapple with constraints (using Xcode 6 GM seed). Using reset to suggested constraints, everything looks right in the universal storyboard and in the preview:

As you can see, I'm previewing for multiple screen sizes. All of them have the image of the dot (and the image itself takes up the whole view, set to draw in the center) in the center. However, when I load it on the simulator, I see:

I'm not sure why this is happening. As far as I can tell, the constraints are all as they should be:

Is there something I am doing? Or is there a bug here in xcode 6?

Thanks in advance!

Answer 1

You don't need to add Leading, trailing, and vertical space constraints. To place your dot in center you need to add Horizontal and Vertical center in container constraint. Place your dot in the center of controller and add these two like in the given image.