问题
Currently, I'm using Xcode 6 Beta 6 for this thread. I have this single view application for iOS 8.0 and iPhone devices only. That single view have the value Inferred under the Attribute Inspector > Simulated Metrics.
At first I didn't try to apply the Add Missing Constraints since I'm trying to layout the view to support a single layout both for 3.5" and 4" display. After running the current view - WYSIWYG on the simulator. That's fine and correct. When I tried to apply Add Missing Constraints, the changes applied to the base storyboard as well as to the device previews. But when I tried to run the application on the simulator, it wasn't the same.
What went wrong here?
来源：https://stackoverflow.com/questions/25526774/simulator-and-storyboard-preview-difference