Can't resize UIView in IB
I think that you cannot edit the size while simulating any user interface elements such as the status bar in Interface Builder. You could try turning the simulated elements off if any are enabled. Not exactly sure why this is, so would appreciate feedback from anyone who knows why exactly this is - there must be a good reason.
In order to achieve that in XCode 4.6.3/5.0.2 you need to follow the screenshot below:
- Under 'File Inspector' -> untick
Use Auto Layout - Click on Attributes Selector & Choose
Freeformfor Size
This is needed when creating a headerView for a tableView
The part that you are looking for is on the first Inspector panel (Command-1). Right at the top there is a section that is labeled Simulated User Interface Elements. By default the Status Bar is on. You need to make sure all three are set to None.