auto-resize a XIB file to be as the screen size - objective-c

Question

I have a View Controller which has a scrollView embedded inside. In this Scroll view I have adding 4 views which are XIB file views. The XIB files size are 'Inferred' although appear to be iphone5 sizing. When loaded they are not auto-resizing to be the size of the screen, they are staying at iphone5 size.
How can I make the XIB file be the same size as the screen it is loading into?
EDIT:
I have also tried changing the the size of the nib files through the code like this:
// 1) Create the three views used in the swipe container view
let AVc :AViewController = AViewController(nibName: "AViewController", bundle: nil);
let BVc :BViewController = BViewController(nibName: "BViewController", bundle: nil);
let CVc :CViewController = CViewController(nibName: "CViewController", bundle: nil);
let DVc :DViewController = DViewController(nibName: "DViewController", bundle: nil);
AVc.view.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height)
BVc.view.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height)
CVc.view.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height)
DVc.view.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height)
// 2) Add in each view to the container view hierarchy
// Add them in opposite order since the view hieracrhy is a stack
self.addChildViewController(DVc);
self.scrollView!.addSubview(DVc.view);
DVc.didMoveToParentViewController(self);
self.addChildViewController(CVc);
self.scrollView!.addSubview(CVc.view);
CVc.didMoveToParentViewController(self);
self.addChildViewController(BVc);
self.scrollView!.addSubview(BVc.view);
BVc.didMoveToParentViewController(self);
self.addChildViewController(AVc);
self.scrollView!.addSubview(AVc.view);
AVc.didMoveToParentViewController(self);
This still has no affect and it loads the wrong size.

Answer 1

I suggest you to use size classes and then apply the necessary constants at first it'll be a little difficult but by time you'll learn how to apply the size classes and constants.
Here are the links where you'll find the best examples.

Answer 2

If you are not using Auto-Layout then you can add the four views simply by for loop:
let bounds = UIScreen.mainScreen().bounds
let width = bounds.size.width
let height = bounds.size.height
var yAxis: CGFloat = 0.0
for i in 0...3 {
let rect: CGRect = CGRectMake(0, yAxis, width, height)
swift i {
case 0:
view1.frame = rect
case 1:
view2.frame = rect
case 2:
view3.frame = rect
case 3:
view4.frame = rect
default:
break
}
yAxis = yAxis + height
}
Where view1, view2, view3 and view4 are your 4 xib views.
Also, set the content size of the scroll view to height yAxis.
Recommended, You should use AutoLayout it will reduce the lines of code.