Autoscaling on iOS - ios

Question

Hey my iOS app is very simple and instead of messing with the auto-layout feature of Xcode is there a way to just programmatically size the screen for each resolution. I am using the storyboard feature of Xcode, but I can't seem to figure this out. I googled it quite extensively, the only thing I found was Editor > Resolve Auto Layout Issues > Reset to...
That works well, except it always squishes my images. I try to set a forced height on them and then everything goes crazy!
So Is there any techniques that shrink everything in the view by 10% vertically?
Thanks, Krkto
-BTW screen is a UIView
-edit- also When I set the autolayout to "Reset to suggested contraints in..." and I call a animation that scrolls the view up, it scrolls the assets up slowly, while the background goes up in a normal fashion.

Answer 1

Here is how I would do it with AutoLayout.
Setup your view in IB / Storyboard
Setup the constraints
Since you want to scale subviews - set their height and width constraints.
So - Width constraint:
Do this by
ctrl + drag inside the UIView from left to right (Or visa versa)
When you stop dragging a pop up will show with two options: choose Width.
So the same for height - just ctrl + drag from within the UIView you want to scale, top to bottom or bottom to top and when the pop up shows, click height.
Now that your constraints are set - find them in the left panel that shows all your UIView objects for your IB / Storyboard. They will be in the same UIView you made them in.
Now, ctrl + drag them to your view controller - these will create NSLayoutConstraint `IBOutLets
Example:
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *heightConstraint;
Now - when you want to update the height constraint (and width) - in code, do something like this:
self. heightConstraint.constant = 10; // new Size
[self.view layoutSubviews]; //Causes setNeedsDisplay to be called on all subviews in UIView
That's all there is to it. You could put this code inside a UIView animation and it will animate nicely, too. Just use some simple math to calculate the size to whatever % you want.
If you look in IB / Storyboard - you will see where the constraints in the left side of Xcode are shown, it will give you there current constant value.
Example:
Hope this helps.

Answer 2

What your missing is constraints. raywenderlich on autolayout
This tutorial provides what I believe your looking for.

Answer 3

It looks like what #krtko really wanted was to turn off Auto-Layout, Size Classes and put the app into auto-scale mode. For simpler screens this is just an easier way to handle the four screen sizes than Auto Layout. The "struts and springs" (Autoresizing) function can still be used to define what happens as the screen real-estate grows or shrinks (particularly in the case of iPhone 4 / iPhone-on-iPad mode).
The key is to use the UILaunchImages key in info.plist and specify images for only 320x480 and 320x568. This throws app into a mode where the 6 and 6+ sizes are automatically displayed as an iPhone 5 scaled up. You lose the benefits of high resolution, but gain a lot of time not having to play with AutoLayout and deliver lots of image files in all the resolutions. Great for MVPs and quick prototypes.
https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html#//apple_ref/doc/uid/TP40009252-SW28
Note that in this environment, the Assistant Editor / Preview function does not work properly; it shows what the view would look like if rendered through the usual scaling mechanisms, not the automatic scaling that is used when compiled. The simulator will show the correct layout.